Timing Animation Events

I'm making an applet game, and I want to be able to time certain events , specified at my interval. .
Thread blah = new Thread();
try {blah.sleep(time);} catch (InterruptedException ex) {}^ doesn't work, because when this new thread is paused for x amount of time, the main thread in the applet pauses as well. Therefore, when the gun overheats, the plane, the enemy, the GAME stops animating completely.
Any suggestions?

Your thread blah is never started. sleep is a static method of Thread and it pauses the current thread and not another one.
You could create a thread and start it and call Thread.sleep() from within the run method of that thread or you could use a javax.swing.Timer and add an ActionListener to it.
Of course that doesn't give you very accurate timing. Depending on the OS it is only accurate to a few ms. or even more then 10ms.
under Windows it's usually more then 10ms which means it is not the best way to time an animation but for normal applications it has to suffice. Although I wonder how media player applications handle this. Maybe there is something in the WinAPI for that.
Games often don't pause their rendering thread at all but let it run an infinite loop and measure the elapsed time. In Java that could be done with System.nanoTime(). That would give you very precise timing but it would also use up 100% of the CPU.

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    DB CPU                                               34,818.8         32.7
    parse time elapsed                                      714.7           .7
    hard parse elapsed time                                 684.8           .6
    PL/SQL execution elapsed time                           161.9           .2
    PL/SQL compilation elapsed time                          44.2           .0
    connection management call elapsed time                  16.9           .0
    hard parse (sharing criteria) elapsed time               10.2           .0
    hard parse (bind mismatch) elapsed time                   9.4           .0
    sequence load elapsed time                                2.9           .0
    repeated bind elapsed time                                0.5           .0
    failed parse elapsed time                                 0.0           .0
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    background elapsed time                               1,753.9
    background cpu time                                      61.7
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    IDLE_TIME                             22,203,740
    IOWAIT_TIME                            2,517,864
    NICE_TIME                                      3
    SYS_TIME                                 145,696
    USER_TIME                              3,557,758
    LOAD                                           0                0
    RSRC_MGR_CPU_WAIT_TIME                         0
    VM_IN_BYTES                      358,813,045,760
    VM_OUT_BYTES                      29,514,830,848
    PHYSICAL_MEMORY_BYTES             51,539,607,552
    NUM_CPUS                                       8
    NUM_CPU_CORES                                  8
    NUM_CPU_SOCKETS                                8
    GLOBAL_RECEIVE_SIZE_MAX                4,194,304
    GLOBAL_SEND_SIZE_MAX                   1,048,586
    TCP_RECEIVE_SIZE_DEFAULT                  87,380
    TCP_RECEIVE_SIZE_MAX                   4,194,304
    TCP_RECEIVE_SIZE_MIN                       4,096
    TCP_SEND_SIZE_DEFAULT                     16,384
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    29-Feb 10:00:33      1.2     13.8     13.3      0.5     86.2      2.0
    29-Feb 11:00:43      1.3     14.5     14.0      0.5     85.5      3.8
    29-Feb 12:00:47      0.4      4.9      4.2      0.7     95.1     10.6
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    -> s  - second, ms - millisecond -    1000th of a second
    -> ordered by wait time desc, waits desc
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                                          %Time       Total Wait     wait
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    DB CPU                                                34,819               32.7
    Commit                         40,629     0              119        3       0.1
    System I/O                     26,504     0               57        2       0.1
    Network                     1,945,010     0               11        0       0.0
    Other                         125,200    99                4        0       0.0
    Application                     2,673     0                2        1       0.0
    Concurrency                     3,059     0                1        0       0.0
    Configuration                      31    19                0       15       0.0
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    db file sequential read      14,092,706     0     65,613       5    108.0   61.6
    read by other session           308,534     0      1,260       4      2.4    1.2
    direct path read                 97,454     0        987      10      0.7     .9
    db file scattered read           71,870     0        910      13      0.6     .9
    db file parallel read            35,001     0        372      11      0.3     .3
    log file sync                    40,629     0        119       3      0.3     .1
    control file sequential re       26,504     0         57       2      0.2     .1
    direct path read temp            14,499     0         49       3      0.1     .0
    direct path write temp            9,186     0         28       3      0.1     .0
    SQL*Net message to client     1,923,973     0          5       0     14.7     .0
    SQL*Net message from dblin        1,056     0          5       5      0.0     .0
    Disk file operations I/O          8,848     0          2       0      0.1     .0
    ASM file metadata operatio           36     0          2      54      0.0     .0
    SQL*Net break/reset to cli        2,636     0          1       1      0.0     .0
    ADR block file read                 472     0          1       1      0.0     .0
    os thread startup                     8     0          1      74      0.0     .0
    SQL*Net more data to clien       17,656     0          1       0      0.1     .0
    asynch descriptor resize        123,852   100          0       0      0.9     .0
    local write wait                    110     0          0       4      0.0     .0
    utl_file I/O                     55,635     0          0       0      0.4     .0
    log file switch (private s            8     0          0      52      0.0     .0
    cursor: pin S wait on X               2     0          0     142      0.0     .0
    enq: KO - fast object chec           13     0          0      20      0.0     .0
    PX Deq: Slave Session Stat          248     0          0       1      0.0     .0
    enq: RO - fast object reus           18     0          0      11      0.0     .0
    latch: cache buffers chain        2,511     0          0       0      0.0     .0
    latch: shared pool                  195     0          0       1      0.0     .0
    CSS initialization                   12     0          0       8      0.0     .0
    PX qref latch                        54   100          0       2      0.0     .0
    SQL*Net more data from cli          995     0          0       0      0.0     .0
    SQL*Net more data from dbl          300     0          0       0      0.0     .0
    kksfbc child completion               1   100          0      56      0.0     .0
    library cache: mutex X              244     0          0       0      0.0     .0
    PX Deq: Signal ACK RSG              124     0          0       0      0.0     .0
    undo segment extension                6   100          0       7      0.0     .0
    PX Deq: Signal ACK EXT              124     0          0       0      0.0     .0
    library cache load lock               3     0          0       9      0.0     .0
    ADR block file write                 45     0          0       1      0.0     .0
    CSS operation: action                12     0          0       2      0.0     .0
    reliable message                     28     0          0       1      0.0     .0
    CSS operation: query                 72     0          0       0      0.0     .0
    latch: row cache objects             14     0          0       1      0.0     .0
    enq: SQ - contention                 17     0          0       0      0.0     .0
    latch free                           32     0          0       0      0.0     .0
    buffer busy waits                    52     0          0       0      0.0     .0
    enq: PS - contention                 16     0          0       0      0.0     .0
    enq: TX - row lock content            6     0          0       1      0.0     .0
    SQL*Net message to dblink         1,018     0          0       0      0.0     .0
    cursor: pin S                        23     0          0       0      0.0     .0
    latch: cache buffers lru c            8     0          0       0      0.0     .0
    SQL*Net message from clien    1,923,970     0    944,508     491     14.7
    jobq slave wait                  66,732   100     33,334     500      0.5
    Streams AQ: waiting for me        6,481   100     32,412    5001      0.0
    wait for unread message on       32,858    98     32,411     986      0.3
    PX Deq: Execution Msg             1,448     0        190     131      0.0
    PX Deq: Execute Reply             1,196     0         74      62      0.0
    HS message to agent                 228     0          4      19      0.0
    single-task message                  42     0          4      97      0.0
    PX Deq Credit: send blkd            904     0          2       3      0.0
    PX Deq Credit: need buffer          205     0          1       3      0.0
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    -> s  - second, ms - millisecond -    1000th of a second
    -> Only events with Total Wait Time (s) >= .001 are shown
    -> ordered by wait time desc, waits desc (idle events last)
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    Event                             Waits -outs   Time (s)    (ms)     /txn   time
    PX Deq: Table Q Normal            4,291     0          1       0      0.0
    PX Deq: Join ACK                    124     0          0       1      0.0
    PX Deq: Parse Reply                 124     0          0       0      0.0
    KSV master wait                     256     0          0       0      0.0
    Latch Miss Sources                
    -> only latches with sleeps are shown
    -> ordered by name, sleeps desc
                                                         NoWait              Waiter
    Latch Name               Where                       Misses     Sleeps   Sleeps
    ASM map operation freeli kffmTranslate2                   0          2        0
    DML lock allocation      ktadmc                           0          2        0
    FOB s.o list latch       ksfd_allfob                      0          2        2
    In memory undo latch     ktiFlushMe                       0          5        0
    In memory undo latch     ktichg: child                    0          3        0
    PC and Classifier lists  No latch                         0          6        0
    Real-time plan statistic keswxAddNewPlanEntry             0         20       20
    SQL memory manager worka qesmmIRegisterWorkArea:1         0          1        1
    active service list      kswslogon: session logout        0         23       12
    active service list      kswssetsvc: PX session swi       0          6        1
    active service list      kswsite: service iterator        0          1        0
    archive process latch    kcrrgpll                         0          3        3
    cache buffers chains     kcbgtcr_2                        0      1,746      573
    cache buffers chains     kcbgtcr: fast path (cr pin       0      1,024    2,126
    cache buffers chains     kcbgcur_2                        0         60        8
    cache buffers chains     kcbchg1: kslbegin: bufs no       0         16        3
    cache buffers chains     kcbgtcr: fast path               0         14       20
    cache buffers chains     kcbzibmlt: multi-block rea       0         10        0
    cache buffers chains     kcbrls_2                         0          9       53
    cache buffers chains     kcbgtcr: kslbegin shared         0          8        1
    cache buffers chains     kcbrls_1                         0          7       84
    cache buffers chains     kcbgtcr: kslbegin excl           0          6       14
    cache buffers chains     kcbnew: new latch again          0          6        0
    cache buffers chains     kcbzgb: scan from tail. no       0          6        0
    cache buffers chains     kcbzwb                           0          5        8
    cache buffers chains     kcbgcur: fast path (shr)         0          3        0
    cache buffers chains     kcbget: pin buffer               0          3        0
    cache buffers chains     kcbzhngcbk2_1                    0          1        0
    cache buffers lru chain  kcbzgws                          0         19        0
    cache buffers lru chain  kcbo_link_q                      0          3        0
    call allocation          ksuxds                           0         14       10
    call allocation          ksudlp: top call                 0          2        3
    enqueue hash chains      ksqgtl3                          0          2        1
    enqueue hash chains      ksqrcl                           0          1        2
    enqueues                 ksqgel: create enqueue           0          1        0
    object queue header oper kcbo_unlink_q                    0          5        2
    object queue header oper kcbo_sw_buf                      0          2        0
    object queue header oper kcbo_link_q                      0          1        2
    object queue header oper kcbo_switch_cq                   0          1        2
    object queue header oper kcbo_switch_mq_bg                0          1        4
    parallel query alloc buf kxfpbalo                         0          1        1
    process allocation       ksucrp:1                         0          2        0
    process queue reference  kxfpqrsnd                        0          1        0
    qmn task queue latch     kwqmnmvtsks: delay to read       0          1        0
    redo allocation          kcrfw_redo_gen: redo alloc       0         17        0
    row cache objects        kqreqd: reget                    0          6        0
    row cache objects        kqrpre: find obj                 0          6       13
    row cache objects        kqrso                            0          2        0
    row cache objects        kqreqd                           0          1        2
    row cache objects        kqrpre: init complete            0          1        1
    shared pool              kghalo                           0        199      106
    shared pool              kghupr1                          0         39      109
    shared pool              kghfre                           0         18       19
    shared pool              kghalp                           0          7       29
    space background task la ktsj_grab_task                   0         21       27
    Mutex Sleep Summary                
    -> ordered by number of sleeps desc
                                                                             Wait
    Mutex Type            Location                               Sleeps    Time (ms)
    Library Cache         kglhdgn2 106                              338           12
    Library Cache         kgllkc1   57                              259           10
    Library Cache         kgllkdl1  85                              123           21
    Cursor Pin            kkslce [KKSCHLPIN2]                        70          286
    Library Cache         kglget2   2                                31            1
    Library Cache         kglhdgn1  62                               31            2
    Library Cache         kglpin1   4                                26            1
    Library Cache         kglpnal1  90                               18            0
    Library Cache         kglpndl1  95                               15            2
    Library Cache         kgllldl2 112                                6            0
    Library Cache         kglini1   32                                1            0
              -------------------------------------------------------------Thanks in advance.

    Hi,
    Thanks for reply.
    I provided one hour report.
    Inst Num Startup Time    Release     RAC
    1 27-Feb-12 09:03 11.2.0.2.0  NO
      Platform                         CPUs Cores Sockets Memory(GB)
    Linux x86 64-bit                    8     8       8      48.00
                  Snap Id      Snap Time      Sessions Curs/Sess
    Begin Snap:      5606 29-Feb-12 04:00:35        63       3.7
      End Snap:      5607 29-Feb-12 05:00:41        63       3.6
       Elapsed:               60.11 (mins)
       DB Time:              382.67 (mins)
    Cache Sizes                       Begin        End
    ~~~~~~~~~~~                  ---------- ----------
                   Buffer Cache:     1,952M     1,952M  Std Block Size:        16K
               Shared Pool Size:     1,024M     1,024M      Log Buffer:    18,868K
    Load Profile              Per Second    Per Transaction   Per Exec   Per Call
    ~~~~~~~~~~~~         ---------------    --------------- ---------- ----------
          DB Time(s):                6.4                0.8       0.03       0.03
           DB CPU(s):                1.0                0.1       0.00       0.00
           Redo size:           84,539.3           10,425.6
       Logical reads:           23,345.6            2,879.1
       Block changes:              386.5               47.7
      Physical reads:            1,605.0              197.9
    Physical writes:                7.1                0.9
          User calls:              233.9               28.9
              Parses:                4.0                0.5
         Hard parses:                0.1                0.0
    W/A MB processed:                0.1                0.0
              Logons:                0.1                0.0
            Executes:              210.9               26.0
           Rollbacks:                0.0                0.0
        Transactions:                8.1
    Instance Efficiency Percentages (Target 100%)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                Buffer Nowait %:   99.62       Redo NoWait %:  100.00
                Buffer  Hit   %:   95.57    In-memory Sort %:  100.00
                Library Hit   %:   99.90        Soft Parse %:   98.68
             Execute to Parse %:   98.10         Latch Hit %:   99.99
    Parse CPU to Parse Elapsd %:   32.08     % Non-Parse CPU:   99.90
    Shared Pool Statistics        Begin    End
                 Memory Usage %:   89.25   89.45
        % SQL with executions>1:   96.79   97.52
      % Memory for SQL w/exec>1:   95.67   96.56
    Top 5 Timed Foreground Events
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                               Avg
                                                              wait   % DB
    Event                                 Waits     Time(s)   (ms)   time Wait Class
    db file sequential read           3,054,464      17,002      6   74.0 User I/O
    DB CPU                                            3,748          16.3
    read by other session               199,603         796      4    3.5 User I/O
    direct path read                     46,301         439      9    1.9 User I/O
    db file scattered read               21,113         269     13    1.2 User I/O
    Host CPU (CPUs:    8 Cores:    8 Sockets:    8)
    ~~~~~~~~         Load Average
                   Begin       End     %User   %System      %WIO     %Idle
                    1.45      1.67      13.2       0.6      15.8      86.2
    Instance CPU
    ~~~~~~~~~~~~
                  % of total CPU for Instance:      13.0
                  % of busy  CPU for Instance:      94.7
      %DB time waiting for CPU - Resource Mgr:       0.0
    Memory Statistics
    ~~~~~~~~~~~~~~~~~                       Begin          End
                      Host Mem (MB):     49,152.0     49,152.0
                       SGA use (MB):      3,072.0      3,072.0
                       PGA use (MB):        513.5        467.7
        % Host Mem used for SGA+PGA:         7.29         7.20
    Time Model Statistics            
    -> Total time in database user-calls (DB Time): 22960.5s
    -> Statistics including the word "background" measure background process
       time, and so do not contribute to the DB time statistic
    -> Ordered by % or DB time desc, Statistic name
    Statistic Name                                       Time (s) % of DB Time
    sql execute elapsed time                             22,835.9         99.5
    DB CPU                                                3,748.4         16.3
    parse time elapsed                                       15.4           .1
    hard parse elapsed time                                  14.3           .1
    PL/SQL execution elapsed time                             7.5           .0
    PL/SQL compilation elapsed time                           6.0           .0
    connection management call elapsed time                   1.6           .0
    sequence load elapsed time                                0.4           .0
    hard parse (sharing criteria) elapsed time                0.0           .0
    repeated bind elapsed time                                0.0           .0
    failed parse elapsed time                                 0.0           .0
    DB time                                              22,960.5
    background elapsed time                                 238.1
    background cpu time                                       4.9
    Operating System Statistics        
    -> *TIME statistic values are diffed.
       All others display actual values.  End Value is displayed if different
    -> ordered by statistic type (CPU Use, Virtual Memory, Hardware Config), Name
    Statistic                                  Value        End Value
    BUSY_TIME                                396,506
    IDLE_TIME                              2,483,725
    IOWAIT_TIME                              455,495
    NICE_TIME                                      0
    SYS_TIME                                  16,163
    USER_TIME                                380,052
    LOAD                                           1                2
    RSRC_MGR_CPU_WAIT_TIME                         0
    VM_IN_BYTES                       95,646,943,232
    VM_OUT_BYTES                       1,686,059,008
    PHYSICAL_MEMORY_BYTES             51,539,607,552
    NUM_CPUS                                       8
    NUM_CPU_CORES                                  8
    NUM_CPU_SOCKETS                                8
    GLOBAL_RECEIVE_SIZE_MAX                4,194,304
    GLOBAL_SEND_SIZE_MAX                   1,048,586
    TCP_RECEIVE_SIZE_DEFAULT                  87,380
    TCP_RECEIVE_SIZE_MAX                   4,194,304
    TCP_RECEIVE_SIZE_MIN                       4,096
    TCP_SEND_SIZE_DEFAULT                     16,384
    TCP_SEND_SIZE_MAX                      4,194,304
    TCP_SEND_SIZE_MIN                          4,096
    Operating System Statistics -
    Snap Time           Load    %busy    %user     %sys    %idle  %iowait
    29-Feb 04:00:35      1.4      N/A      N/A      N/A      N/A      N/A
    29-Feb 05:00:41      1.7     13.8     13.2      0.6     86.2     15.8
    Foreground Wait Class              
    -> s  - second, ms - millisecond -    1000th of a second
    -> ordered by wait time desc, waits desc
    -> %Timeouts: value of 0 indicates value was < .5%.  Value of null is truly 0
    -> Captured Time accounts for         97.6%  of Total DB time      22,960.46 (s)
    -> Total FG Wait Time:            18,651.75 (s)  DB CPU time:       3,748.35 (s)
                                                                      Avg
                                          %Time       Total Wait     wait
    Wait Class                      Waits -outs         Time (s)     (ms)  %DB time
    User I/O                    3,327,253     0           18,576        6      80.9
    DB CPU                                                 3,748               16.3
    Commit                         23,882     0               69        3       0.3
    System I/O                      1,035     0                3        3       0.0
    Network                       842,393     0                2        0       0.0
    Other                          10,120    99                0        0       0.0
    Configuration                       3     0                0       58       0.0
    Application                       264     0                0        1       0.0
    Concurrency                     1,482     0                0        0       0.0
    Foreground Wait Events            
    -> s  - second, ms - millisecond -    1000th of a second
    -> Only events with Total Wait Time (s) >= .001 are shown
    -> ordered by wait time desc, waits desc (idle events last)
    -> %Timeouts: value of 0 indicates value was < .5%.  Value of null is truly 0
                                                                 Avg
                                            %Time Total Wait    wait    Waits   % DB
    Event                             Waits -outs   Time (s)    (ms)     /txn   time
    db file sequential read       3,054,464     0     17,002       6    104.5   74.0
    read by other session           199,603     0        796       4      6.8    3.5
    direct path read                 46,301     0        439       9      1.6    1.9
    db file scattered read           21,113     0        269      13      0.7    1.2
    log file sync                    23,882     0         69       3      0.8     .3
    db file parallel read             4,727     0         68      14      0.2     .3
    control file sequential re        1,035     0          3       3      0.0     .0
    SQL*Net message to client       840,792     0          2       0     28.8     .0
    direct path read temp                95     0          2      18      0.0     .0
    local write wait                     79     0          0       4      0.0     .0
    Disk file operations I/O            870     0          0       0      0.0     .0
    ASM file metadata operatio            4     0          0      50      0.0     .0
    log file switch (private s            3     0          0      58      0.0     .0
    ADR block file read                  36     0          0       3      0.0     .0
    enq: RO - fast object reus            5     0          0      16      0.0     .0
    latch: cache buffers chain        1,465     0          0       0      0.1     .0
    SQL*Net break/reset to cli          256     0          0       0      0.0     .0
    asynch descriptor resize         10,059   100          0       0      0.3     .0
    SQL*Net more data to clien        1,510     0          0       0      0.1     .0
    enq: KO - fast object chec            3     0          0       8      0.0     .0
    SQL*Net more data from cli           91     0          0       0      0.0     .0
    latch: shared pool                   14     0          0       0      0.0     .0
    ADR block file write                  5     0          0       1      0.0     .0
    reliable message                      8     0          0       0      0.0     .0
    direct path write temp                1     0          0       2      0.0     .0
    SQL*Net message from clien      840,794     0     68,885      82     28.8
    jobq slave wait                   7,365   100      3,679     499      0.3
    Streams AQ: waiting for me          721   100      3,605    5000      0.0
    wait for unread message on        3,648    98      3,603     988      0.1
    KSV master wait                      20     0          0       0      0.0
    Background Wait Events            
    -> ordered by wait time desc, waits desc (idle events last)
    -> Only events with Total Wait Time (s) >= .001 are shown
    -> %Timeouts: value of 0 indicates value was < .5%.  Value of null is truly 0
                                                                 Avg
                                            %Time Total Wait    wait    Waits   % bg
    Event                             Waits -outs   Time (s)    (ms)     /txn   time
    log file parallel write          29,353     0         83       3      1.0   34.8
    db file parallel write            5,753     0         17       3      0.2    6.9
    db file sequential read           1,638     0         15       9      0.1    6.1
    control file sequential re        5,142     0         13       2      0.2    5.4
    os thread startup                   140     0          8      58      0.0    3.4
    control file parallel writ        1,440     0          8       6      0.0    3.4
    log file sequential read            304     0          8      26      0.0    3.3
    db file scattered read              214     0          2       9      0.0     .8
    ASM file metadata operatio        1,199     0          1       1      0.0     .3
    direct path write                    35     0          0       6      0.0     .1
    direct path read                     41     0          0       5      0.0     .1
    kfk: async disk IO                    6     0          0       9      0.0     .0
    Disk file operations I/O          1,266     0          0       0      0.0     .0
    ADR block file read                  16     0          0       2      0.0     .0
    read by other session                 3     0          0       8      0.0     .0
    Log archive I/O                       2     0          0      10      0.0     .0
    log file sync                         3     0          0       5      0.0     .0
    asynch descriptor resize            341   100          0       0      0.0     .0
    CSS initialization                    1     0          0       6      0.0     .0
    log file single write                 4     0          0       1      0.0     .0
    latch: redo allocation                3     0          0       1      0.0     .0
    ADR block file write                  5     0          0       1      0.0     .0
    LGWR wait for redo copy              45     0          0       0      0.0     .0
    CSS operation: query                  6     0          0       0      0.0     .0
    CSS operation: action                 1     0          0       1      0.0     .0
    SQL*Net message to client           420     0          0       0      0.0     .0
    rdbms ipc message                47,816    39     61,046    1277      1.6
    DIAG idle wait                    7,200   100      7,200    1000      0.2
    Space Manager: slave idle         1,146    98      5,674    4951      0.0
    class slave wait                    284     0      3,983   14026      0.0
    dispatcher timer                     61   100      3,660   60006      0.0
    Streams AQ: qmn coordinato          258    50      3,613   14003      0.0
    Streams AQ: qmn slave idle          130     0      3,613   27789      0.0
    Streams AQ: waiting for ti            7    71      3,608  515430      0.0
    wait for unread message on        3,605   100      3,606    1000      0.1
    pmon timer                        1,201   100      3,604    3001      0.0
    smon timer                           15    73      3,603  240207      0.0
    ASM background timer                754     0      3,602    4777      0.0
    shared server idle wait             120   100      3,601   30006      0.0
    SQL*Net message from clien          554     0          4       7      0.0
    KSV master wait                     101     0          0       2      0.0
    Wait Event Histogram              
    -> Units for Total Waits column: K is 1000, M is 1000000, G is 1000000000
    -> % of Waits: value of .0 indicates value was <.05%; value of null is truly 0
    -> % of Waits: column heading of <=1s is truly <1024ms, >1s is truly >=1024ms
    -> Ordered by Event (idle events last)
                                                        % of Waits
                               Total
    Event                      Waits  <1ms  <2ms  <4ms  <8ms <16ms <32ms  <=1s   >1s
    ADR block file read           52  73.1   1.9   9.6  13.5               1.9
    ADR block file write          10 100.0
    ADR file lock                 12 100.0
    ARCH wait for archivelog l     3 100.0
    ASM file metadata operatio  1203  97.3    .5    .7    .3    .2          .9
    CSS initialization             1                   100.0
    CSS operation: action          1       100.0
    CSS operation: query           6  83.3  16.7
    Disk file operations I/O    2118  95.4   4.5    .1
    LGWR wait for redo copy       45 100.0
    Log archive I/O                2                         100.0
    SQL*Net break/reset to cli   256  99.6    .4
    SQL*Net message to client  839.9 100.0    .0
    SQL*Net more data from cli    91 100.0
    SQL*Net more data to clien  1503 100.0
    asynch descriptor resize   10.4K 100.0
    buffer busy waits              2 100.0
    control file parallel writ  1440   5.7  35.1  24.0  16.3  12.0   5.5   1.5
    control file sequential re  6177  69.4   7.5   5.9   8.1   7.1   1.7    .3
    db file parallel read       4727   1.7   3.2   3.2  10.1  46.6  33.3   1.8
    db file parallel write      5755  42.3  21.3  18.6  11.2   4.6   1.4    .5
    db file scattered read     21.5K   8.4   4.3  11.9  18.9  26.3  25.3   4.9
    db file sequential read    3053.  28.7  15.1  11.1  17.9  21.5   5.4    .3    .0
    direct path read           46.3K   9.9   8.8  18.5  21.7  22.8  15.7   2.7
    direct path read temp         95               9.5   9.5  23.2  49.5   8.4
    direct path write             35  11.4  31.4  17.1  22.9  11.4   2.9   2.9
    direct path write temp         1       100.0
    enq: KO - fast object chec     3                    66.7  33.3
    enq: RO - fast object reus     5  20.0              20.0  20.0  20.0  20.0
    kfk: async disk IO             6  50.0  16.7              16.7        16.7
    latch free                     3 100.0
    latch: cache buffers chain  1465 100.0
    latch: cache buffers lru c     1 100.0
    latch: object queue header     2 100.0
    latch: redo allocation         3  33.3  33.3  33.3
    latch: row cache objects       2 100.0
    latch: shared pool            15  93.3   6.7
    local write wait              79        35.4  34.2  21.5   8.9
    log file parallel write    29.4K  47.8  21.7  11.9   9.9   6.8   1.6    .3
    log file sequential read     304   6.3   3.0   3.6  10.2  23.4  24.3  29.3
    log file single write          4  25.0  75.0
    log file switch (private s     3                                     100.0
    log file sync              23.9K  40.9  28.0  12.9   9.7   6.7   1.5    .3
    os thread startup            140                                     100.0
    read by other session      199.6  37.1  19.9  12.9  13.1  13.8   3.1    .2
    reliable message               8 100.0
    ASM background timer         755   2.9    .4    .1    .1    .3    .1    .3  95.8
    DIAG idle wait              7196                                     100.0
    KSV master wait              121  88.4   2.5   3.3   2.5    .8    .8   1.7
    SQL*Net message from clien 840.1  97.1   1.8    .5    .2    .2    .1    .0    .1
    Space Manager: slave idle   1147    .1                                  .5  99.4
    Streams AQ: qmn coordinato   258  49.6                .4                    50.0
    Streams AQ: qmn slave idle   130    .8                                      99.2
    Streams AQ: waiting for me   721                                           100.0
    Streams AQ: waiting for ti     7  28.6                                42.9  28.6
    class slave wait             283  39.9   2.5   2.5   3.5   4.9   9.2  15.2  22.3
    dispatcher timer              60                                           100.0
    jobq slave wait             7360    .0    .0    .0                    99.9
    pmon timer                  1201                                           100.0
    rdbms ipc message          47.8K   2.7  31.6  17.4   1.1   1.1    .9  20.9  24.3
    Wait Event Histogram               DB/Inst: I2KPROD/I2KPROD  Snaps: 5606-5607
    -> Units for Total Waits column: K is 1000, M is 1000000, G is 1000000000
    -> % of Waits: value of .0 indicates value was <.05%; value of null is truly 0
    -> % of Waits: column heading of <=1s is truly <1024ms, >1s is truly >=1024ms
    -> Ordered by Event (idle events last)
                                                        % of Waits
                               Total
    Event                      Waits  <1ms  <2ms  <4ms  <8ms <16ms <32ms  <=1s   >1s
    shared server idle wait      120                                           100.0
    smon timer                    16                                       6.3  93.8
    wait for unread message on  7250                                  .1  99.9
    Latch Miss Sources                
    -> only latches with sleeps are shown
    -> ordered by name, sleeps desc
                                                         NoWait              Waiter
    Latch Name               Where                       Misses     Sleeps   Sleeps
    In memory undo latch     ktichg: child                    0          1        0
    active service list      kswslogon: session logout        0          2        0
    cache buffers chains     kcbgtcr_2                        0      1,123      483
    cache buffers chains     kcbgtcr: fast path (cr pin       0        496    1,131
    cache buffers chains     kcbrls_2                         0          5        6
    cache buffers chains     kcbgcur_2                        0          4        0
    cache buffers chains     kcbgtcr: fast path               0          3        1
    cache buffers chains     kcbzwb                           0          2        4
    cache buffers chains     kcbchg1: kslbegin: bufs no       0          1        0
    cache buffers chains     kcbnew: new latch again          0          1        0
    cache buffers chains     kcbrls_1                         0          1        6
    cache buffers chains     kcbzgb: scan from tail. no       0          1        0
    cache buffers lru chain  kcbzgws                          0          1        0
    object queue header oper kcbo_switch_cq                   0          1        0
    object queue header oper kcbo_switch_mq_bg                0          1        2
    redo allocation          kcrfw_redo_gen: redo alloc       0          3        0
    row cache objects        kqrpre: find obj                 0          1        1
    row cache objects        kqrso                            0          1        0
    shared pool              kghalo                           0         13        3
    shared pool              kghupr1                          0          4       15
    shared pool              kghalp                           0          1        0
    space background task la ktsj_grab_task                   0          2        2
              -------------------------------------------------------------

  • Log file sync top event during performance test -av 36ms

    Hi,
    During the performance test for our product before deployment into product i see "log file sync" on top with Avg wait (ms) being 36 which i feel is too high.
                                                               Avg
                                                              wait   % DB
    Event                                 Waits     Time(s)   (ms)   time Wait Class
    log file sync                       208,327       7,406     36   46.6 Commit
    direct path write                   646,833       3,604      6   22.7 User I/O
    DB CPU                                            1,599          10.1
    direct path read temp             1,321,596         619      0    3.9 User I/O
    log buffer space                      4,161         558    134    3.5 ConfiguratAlthough testers are not complaining about the performance of the appplication , we ,DBAs, are expected to be proactive about the any bad signals from DB.
    I am not able to figure out why "log file sync" is having such slow response.
    Below is the snapshot from the load profile.
                  Snap Id      Snap Time      Sessions Curs/Sess
    Begin Snap:    108127 16-May-13 20:15:22       105       6.5
      End Snap:    108140 16-May-13 23:30:29       156       8.9
       Elapsed:              195.11 (mins)
       DB Time:              265.09 (mins)
    Cache Sizes                       Begin        End
    ~~~~~~~~~~~                  ---------- ----------
                   Buffer Cache:     1,168M     1,136M  Std Block Size:         8K
               Shared Pool Size:     1,120M     1,168M      Log Buffer:    16,640K
    Load Profile              Per Second    Per Transaction   Per Exec   Per Call
    ~~~~~~~~~~~~         ---------------    --------------- ---------- ----------
          DB Time(s):                1.4                0.1       0.02       0.01
           DB CPU(s):                0.1                0.0       0.00       0.00
           Redo size:          607,512.1           33,092.1
       Logical reads:            3,900.4              212.5
       Block changes:            1,381.4               75.3
      Physical reads:              134.5                7.3
    Physical writes:              134.0                7.3
          User calls:              145.5                7.9
              Parses:               24.6                1.3
         Hard parses:                7.9                0.4
    W/A MB processed:          915,418.7           49,864.2
              Logons:                0.1                0.0
            Executes:               85.2                4.6
           Rollbacks:                0.0                0.0
        Transactions:               18.4Some of the top background wait events:
    ^LBackground Wait Events       DB/Inst: Snaps: 108127-108140
    -> ordered by wait time desc, waits desc (idle events last)
    -> Only events with Total Wait Time (s) >= .001 are shown
    -> %Timeouts: value of 0 indicates value was < .5%.  Value of null is truly 0
                                                                 Avg
                                            %Time Total Wait    wait    Waits   % bg
    Event                             Waits -outs   Time (s)    (ms)     /txn   time
    log file parallel write         208,563     0      2,528      12      1.0   66.4
    db file parallel write            4,264     0        785     184      0.0   20.6
    Backup: sbtbackup                     1     0        516  516177      0.0   13.6
    control file parallel writ        4,436     0         97      22      0.0    2.6
    log file sequential read          6,922     0         95      14      0.0    2.5
    Log archive I/O                   6,820     0         48       7      0.0    1.3
    os thread startup                   432     0         26      60      0.0     .7
    Backup: sbtclose2                     1     0         10   10094      0.0     .3
    db file sequential read           2,585     0          8       3      0.0     .2
    db file single write                560     0          3       6      0.0     .1
    log file sync                        28     0          1      53      0.0     .0
    control file sequential re       36,326     0          1       0      0.2     .0
    log file switch completion            4     0          1     207      0.0     .0
    buffer busy waits                     5     0          1     116      0.0     .0
    LGWR wait for redo copy             924     0          1       1      0.0     .0
    log file single write                56     0          1       9      0.0     .0
    Backup: sbtinfo2                      1     0          1     500      0.0     .0During a previous perf test , things didnt look this bad for "log file sync. Few sections from the comparision report(awrddprt.sql)
    {code}
    Workload Comparison
    ~~~~~~~~~~~~~~~~~~~ 1st Per Sec 2nd Per Sec %Diff 1st Per Txn 2nd Per Txn %Diff
    DB time: 0.78 1.36 74.36 0.02 0.07 250.00
    CPU time: 0.18 0.14 -22.22 0.00 0.01 100.00
    Redo size: 573,678.11 607,512.05 5.90 15,101.84 33,092.08 119.13
    Logical reads: 4,374.04 3,900.38 -10.83 115.14 212.46 84.52
    Block changes: 1,593.38 1,381.41 -13.30 41.95 75.25 79.38
    Physical reads: 76.44 134.54 76.01 2.01 7.33 264.68
    Physical writes: 110.43 134.00 21.34 2.91 7.30 150.86
    User calls: 197.62 145.46 -26.39 5.20 7.92 52.31
    Parses: 7.28 24.55 237.23 0.19 1.34 605.26
    Hard parses: 0.00 7.88 100.00 0.00 0.43 100.00
    Sorts: 3.88 4.90 26.29 0.10 0.27 170.00
    Logons: 0.09 0.08 -11.11 0.00 0.00 0.00
    Executes: 126.69 85.19 -32.76 3.34 4.64 38.92
    Transactions: 37.99 18.36 -51.67
    First Second Diff
    1st 2nd
    Event Wait Class Waits Time(s) Avg Time(ms) %DB time Event Wait Class Waits Time(s) Avg Time
    (ms) %DB time
    SQL*Net more data from client Network 2,133,486 1,270.7 0.6 61.24 log file sync Commit 208,355 7,407.6
    35.6 46.57
    CPU time N/A 487.1 N/A 23.48 direct path write User I/O 646,849 3,604.7
    5.6 22.66
    log file sync Commit 99,459 129.5 1.3 6.24 log file parallel write System I/O 208,564 2,528.4
    12.1 15.90
    log file parallel write System I/O 100,732 126.6 1.3 6.10 CPU time N/A 1,599.3
    N/A 10.06
    SQL*Net more data to client Network 451,810 103.1 0.2 4.97 db file parallel write System I/O 4,264 784.7 1
    84.0 4.93
    -direct path write User I/O 121,044 52.5 0.4 2.53 -SQL*Net more data from client Network 7,407,435 279.7
    0.0 1.76
    -db file parallel write System I/O 986 22.8 23.1 1.10 -SQL*Net more data to client Network 2,714,916 64.6
    0.0 0.41
    {code}
    *To sum it sup:
    1. Why is the IO response getting such an hit during the new perf test? Please suggest*
    2. Does the number of DB writer impact "log file sync" wait event? We have only one DB writer as the number of cpu on the host is only 4
    {code}
    select *from v$version;
    BANNER
    Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
    PL/SQL Release 11.1.0.7.0 - Production
    CORE 11.1.0.7.0 Production
    TNS for HPUX: Version 11.1.0.7.0 - Production
    NLSRTL Version 11.1.0.7.0 - Production
    {code}
    Please let me know if you would like to see any other stats.
    Edited by: Kunwar on May 18, 2013 2:20 PM

    1. A snapshot interval of 3 hours always generates meaningless results
    Below are some details from the 1 hour interval AWR report.
    Platform                         CPUs Cores Sockets Memory(GB)
    HP-UX IA (64-bit)                   4     4       3      31.95
                  Snap Id      Snap Time      Sessions Curs/Sess
    Begin Snap:    108129 16-May-13 20:45:32       140       8.0
      End Snap:    108133 16-May-13 21:45:53       150       8.8
       Elapsed:               60.35 (mins)
       DB Time:              140.49 (mins)
    Cache Sizes                       Begin        End
    ~~~~~~~~~~~                  ---------- ----------
                   Buffer Cache:     1,168M     1,168M  Std Block Size:         8K
               Shared Pool Size:     1,120M     1,120M      Log Buffer:    16,640K
    Load Profile              Per Second    Per Transaction   Per Exec   Per Call
    ~~~~~~~~~~~~         ---------------    --------------- ---------- ----------
          DB Time(s):                2.3                0.1       0.03       0.01
           DB CPU(s):                0.1                0.0       0.00       0.00
           Redo size:          719,553.5           34,374.6
       Logical reads:            4,017.4              191.9
       Block changes:            1,521.1               72.7
      Physical reads:              136.9                6.5
    Physical writes:              158.3                7.6
          User calls:              167.0                8.0
              Parses:               25.8                1.2
         Hard parses:                8.9                0.4
    W/A MB processed:          406,220.0           19,406.0
              Logons:                0.1                0.0
            Executes:               88.4                4.2
           Rollbacks:                0.0                0.0
        Transactions:               20.9
    Top 5 Timed Foreground Events
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                               Avg
                                                              wait   % DB
    Event                                 Waits     Time(s)   (ms)   time Wait Class
    log file sync                        73,761       6,740     91   80.0 Commit
    log buffer space                      3,581         541    151    6.4 Configurat
    DB CPU                                              348           4.1
    direct path write                   238,962         241      1    2.9 User I/O
    direct path read temp               487,874         174      0    2.1 User I/O
    Background Wait Events       DB/Inst: Snaps: 108129-108133
    -> ordered by wait time desc, waits desc (idle events last)
    -> Only events with Total Wait Time (s) >= .001 are shown
    -> %Timeouts: value of 0 indicates value was < .5%.  Value of null is truly 0
                                                                 Avg
                                            %Time Total Wait    wait    Waits   % bg
    Event                             Waits -outs   Time (s)    (ms)     /txn   time
    log file parallel write          61,049     0      1,891      31      0.8   87.8
    db file parallel write            1,590     0        251     158      0.0   11.6
    control file parallel writ        1,372     0         56      41      0.0    2.6
    log file sequential read          2,473     0         50      20      0.0    2.3
    Log archive I/O                   2,436     0         20       8      0.0     .9
    os thread startup                   135     0          8      60      0.0     .4
    db file sequential read             668     0          4       6      0.0     .2
    db file single write                200     0          2       9      0.0     .1
    log file sync                         8     0          1     152      0.0     .1
    log file single write                20     0          0      21      0.0     .0
    control file sequential re       11,218     0          0       0      0.1     .0
    buffer busy waits                     2     0          0     161      0.0     .0
    direct path write                     6     0          0      37      0.0     .0
    LGWR wait for redo copy             380     0          0       0      0.0     .0
    log buffer space                      1     0          0      89      0.0     .0
    latch: cache buffers lru c            3     0          0       1      0.0     .0     2 The log file sync is a result of commit --> you are committing too often, maybe even every individual record.
    Thanks for explanation. +Actually my question is WHY is it so slow (avg wait of 91ms)+3 Your IO subsystem hosting the online redo log files can be a limiting factor.
    We don't know anything about your online redo log configuration
    Below is my redo log configuration.
        GROUP# STATUS  TYPE    MEMBER                                                       IS_
             1         ONLINE  /oradata/fs01/PERFDB1/redo_1a.log                           NO
             1         ONLINE  /oradata/fs02/PERFDB1/redo_1b.log                           NO
             2         ONLINE  /oradata/fs01/PERFDB1/redo_2a.log                           NO
             2         ONLINE  /oradata/fs02/PERFDB1/redo_2b.log                           NO
             3         ONLINE  /oradata/fs01/PERFDB1/redo_3a.log                           NO
             3         ONLINE  /oradata/fs02/PERFDB1/redo_3b.log                           NO
    6 rows selected.
    04:13:14 perf_monitor@PERFDB1> col FIRST_CHANGE# for 999999999999999999
    04:13:26 perf_monitor@PERFDB1> select *from v$log;
        GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS                 FIRST_CHANGE# FIRST_TIME
             1          1      40689  524288000          2 YES INACTIVE              13026185905545 18-MAY-13 01:00
             2          1      40690  524288000          2 YES INACTIVE              13026185931010 18-MAY-13 03:32
             3          1      40691  524288000          2 NO  CURRENT               13026185933550 18-MAY-13 04:00Edited by: Kunwar on May 18, 2013 2:46 PM

  • Animation Performance and Optimization

    Hi, and thanks for reading in advance!
    I'm struggling with getting "smooth-enough" performance for a simple application I'm writing.  I was hoping someone could give some pointers.  Briefly my proof of concept application creates between 1 and 10 independently moving filled circles over a PNG backdrop.  I'm currently getting a very dissapointing, stuttering animation and unacceptably slow frame rates - I would guess in the 10FPS area.
    I removed all Alpha from the fill (originally I did want some alpha)... the only way I get smooth animation is if I totally remove the background PNG (leave white background) and limit the bubbles to 2-3 at a time.  As soon as I introduce a backdrop however even 1 bubble does not animate smoothly.
    Basic architecture I am using:
    "bubble Class" -- creates an individual "bubble" and manages that bubble's life
    the class draws a filled circle shape - then tries to cache it per Adobe Recommendations for GPU acceleration.
    my "main" class then addsChild and modifies .x and .y to translate bubble's motion.  I also tried doing translation via matrix transform with no better results.
    Excerpt from Bubble Class:
    myBubble:Shape = new Shape();  
    myBubble.graphics...........
    this.addChild(myBubble);
    myBubble.cacheAsBitmap = true;
    myBubble.cacheAsBitmapMatrix = new Matrix();
    Now I am doing 2 movements per bubble.  I'm doing a rock (rotate) using the following transform matrix (which I'm assuming will be accelerated by GPU?)
    Further code from Bubble Class
    private function rotateAroundCenter (ob:*, angleDegrees) {
    var point:Point=new Point(ob.x+ob.width/2, ob.y+ob.height/2);
       var m:Matrix=ob.transform.matrix;
    m.tx -= point.x;
        m.ty -= point.y;
        m.rotate (angleDegrees*(Math.PI/180));
        m.tx += point.x;
        m.ty += point.y;
        ob.transform.matrix=m;
    And I'm doing a translation in X and Y.   I do this in the root class....ie:
    code from Main Class
    var thisBubble:Bubble = new Bubble();
    addChild(thisBubble);
    bubbles.push(thisBubble);
    this.addEventListener(Event.ENTER_FRAME, processFrame);
    function processFrame(myEvent:Event):void {
       var thisBubble:Bubble = bubbles[0];
       thisBubble.x++;
       thisBubble.y++;
    or something like that
    Is this too many layers of embed? should I be caching somewhere other than at the Shape level within my Bubble class?  I basically addChild for my shape in the bubble class  and then I addChild bubble instance to my stage.
    Any help is appreciated!!!  I am ready to give up on animating with AS3 and resorting to Objective-C (I hate Objective-C)..... so please!!!  what else needs to be done to take advantage of Hardware GPU acceleration?
    Cheers,
    Tom

    Mr 12 - you are the man.  I really appreciate the time you took in writing your reply.  It was indeed helpful.
    I did the following (see below the line) and it has improved performance.  I can now get smooth-ish animation but by sacrificing significant frame rate.  I also am somewhat limited to the number of moving parts (7). 
    My question to you --- can I cache bitmapData?  right now I am only caching bitmaps...... is that the right thing to do?  reason I ask is when I pop these bubbles I'd like to cycle through a series of bitmap images which I'm now pre-loading at bubble creation into bitmapData variables.  I'm then adding a Bitmap to the stage as child and cycling through each to execute a "pop" animation.  IE 
    addChild(myBitmap)
    mybitmap.bitmapData = mybitmapData1;  // first frame
    mybitmap.bitmapData = mybitmapData9;  // 9th frame of animation etc.
    would be nice to be able to pre-cache that BitmapData in the GPU... can that be done?
    Here is a list of the changes I made which did improve performance:
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    2) added myEvent.stopPropagation(); to all event handlers (now I only have 1 such handler for the Timer).
    3) removed the "rocking" rotation effect from the Bubble class.
    4) removed code which used graphics class to draw the bubbles.  Instead I pre-drew them in Fireworks and imported to flash library.   I am then loading each bitmapData on application launch.  I assign a unique bitmap pointer on bubble creation, cache it, and then pass it to the Bubble class for use and display like this: (bubType is an Array that contains 3 unique bitmapData objects which reference).
    Bubble creation routine: (run 1x per bubble at creation):
    private function timerBlow(myEvent:TimerEvent):void {
       myEvent.stopPropagation();
      if (bubbles.length < 7) {
          var bubBM:Bitmap = new Bitmap(bubType[randomType]);
          bubBM.cacheAsBitmapMatrix = new Matrix();
          bubBM.cacheAsBitmap = true;
          var thisBubble:drawnBubble = new drawnBubble(bubBM,10,0xFFFFFF,"up");  // my bubble class
          thisBubble.x = 100;
          thisBubble.y = 300;
          addChild(thisBubble);
          bubbles.push(thisBubble);
    5) removed variable creation in my old ENTER_FRAME (now TIMER) event handler to move the bubbles as such:
    private function processFrame(myEvent:TimerEvent):void {
       myEvent.stopPropagation();
       if (bubbles.length > 0) {
          var numBubbles:uint = bubbles.length;
          for (var i:uint = 0; i < numBubbles; i++) {
             checkBounds(drawnBubble(bubbles[i]));
             drawnBubble(bubbles[i]).x += drawnBubble(bubbles[i]).xVelocity;
             drawnBubble(bubbles[i]).y += drawnBubble(bubbles[i]).yVelocity;
    Any other clues that someone has as to how to do this faster or things to try are *very* much appreciated.  
    Cheers
    Tom

  • Event handler method

    Hi all,
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    Hi Sushant,
    1. In ABAP Objects, triggering and handling an event means that certain methods act as triggers and trigger events, to which other methods - the handlers - react. This means that the handler methods are executed when the event occurs.
    2.To trigger an event, a class must
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      Trigger the event in one of its methods
    3.You declare events in the declaration part of a class or in an interface. To declare instance events, use the following statement:
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    4. An instance event in a class can be triggered by any instance method in the class. Static events can be triggered by any method. However, static methods can only trigger static events. To trigger an event in a method, use the following statement:
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    Any class can contain event handler methods for events from other classes. You can, of course, also define event handler methods in the same class as the event itself. To declare an event handler method, use the following statement:
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    After the RAISE EVENTstatement, all registered handler methods are executed before the next statement is processed (synchronous event handling). If a handler method itself triggers events, its handler methods are executed before the original handler method continues. To avoid the possibility of endless recursion, events may currently only be nested 64 deep.
    Handler methods are executed in the order in which they were registered. Since event handlers are registered dynamically, you should not assume that they will be processed in a particular order. Instead, you should program as though all event handlers will be executed simultaneously.
    Reward if useful.

  • Event creation  in oops abap

    cud u plz guide me how to create the events in oops abap .
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    Hi,
    Triggering and Handling Events
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    This section contains explains how to work with events in ABAP Objects. For precise details of the relevant ABAP statements, refer to the corresponding keyword documentation in the ABAP Editor.
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    Declaring Events
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    It links a list of handler methods with corresponding trigger methods. There are four different types of event.
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    · An instance event declared in an interface
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    · A static event declared in an interface
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    Timing of Event Handling
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    Handler methods are executed in the order in which they were registered. Since event handlers are registered dynamically, you should not assume that they will be processed in a particular order. Instead, you should program as though all event handlers will be executed simultaneously.
    "Example  :
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      PUBLIC SECTION.
        METHODS increment_counter.
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    CLASS counter IMPLEMENTATION.
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        DATA diff TYPE i.
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  • Latch: session allocation in top 5 wait events

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    This database is only being used for migration activities currently,which means a lot of imports going on.
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    ++++++++++++++++++
    Event     Waits     Time(s)     Avg wait (ms)     % DB time     Wait Class
    DB CPU          8,437          57.95     
    latch: session allocation     2,035,326     3,671     2     25.22     Other
    wait list latch free     243,511     2,448     10     16.81     Other
    direct path write     504,262     363     1     2.49     User I/O
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    user9131570 wrote:
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    PFB the Top 5 Timed Foreground Events
    ++++++++++++++++++
    Event     Waits     Time(s)     Avg wait (ms)     % DB time     Wait Class
    DB CPU          8,437          57.95     
    latch: session allocation     2,035,326     3,671     2     25.22     Other
    wait list latch free     243,511     2,448     10     16.81     Other
    direct path write     504,262     363     1     2.49     User I/O
    log file sync     39,396     156     4     1.07     Commit
    ++++++++++++++++++
    A little more information would help - you could start with the Load Profile section, and the summary of the number of sessions, CPU, and memory. Also OSSTATs might be helpful and the Time Model stats. The version of Oracle might also be relevant.
    See the note below about using the "code" tag and preview option.
    Regards
    Jonathan Lewis
    http://jonathanlewis.wordpress.com
    http://www.jlcomp.demon.co.uk
    To post code, statspack/AWR report, execution plans or trace files, start and end the section with the tag {noformat}{noformat} (lowercase, curly brackets, no spaces) so that the text appears in fixed format.
    There is a +"Preview"+ tab at the top of the text entry panel. Use this to check what your message will look like before you post the message. If it looks a complete mess you're unlikely to get a response. (Click on the +"Plain text"+ tab if you want to edit the text to tidy it up.)
    +"Science is more than a body of knowledge; it is a way of thinking"+
    +Carl Sagan+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

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    Edited by: Insaponata on Jan 9, 2011 8:00 AM

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