CPU TIME on statspack

Guys,
Does anyone know if the CPU TIME in statspack report is total time for number of executions or per execution. Much appreciated..
                                                     CPU      Elapsd
Buffer Gets    Executions Gets per Exec %Total Time (s) Time (s) Hash Value
     13,791,066            5    2,758,213.2   29.5    67.71     92.86 1051544049
Module: siebmtshmw@wasv266 (TNS V1-V3)
SELECT       T28.CONFLICT_ID,       T28.LAST_UPD,       T28.CREA
TED,       T28.LAST_UPD_BY,       T28.CREATED_BY,       T28.MODI
FICATION_NUM,       T28.ROW_ID,       T28.LAST_UPD_BY,       T28
.LAST_UPD,       T28.SR_TITLE,       T26.NAME,       T26.DESC_TE
XT,       T28.CST_OU_ID,       T26.INTEGRATION_ID,       T26.LOCThanks
G

Hi
It's the total (on 9iR2 at least). You can calculate the per-execution pretty easily if you need to.
HTH
Regards Nigel

Similar Messages

How to estimate how much CPU time is parse related DB 9i wide .

Hi,
I'm trying to estimate how much CPU time is parse related and next compare that value after i.e. cursor_cache setting. So far I've found :
parse time cpu
parse time elapsed
in v$sysstat .
Are there good indicators for my needs ?
Basically when I get CPU time from statspack and parsetime_cpu (somehow) i can derive percentage usage.
btw how is 'CPU time' in statspack calculated ?
I'm running AIX DB 9.2.0.8 EE , can take historical data from statspack .
Regards.
Greg

Hi,
I'm trying to estimate how much CPU time is parse related and next compare that value after i.e. cursor_cache setting. So far I've found :
parse time cpu
parse time elapsed
in v$sysstat .
Are there good indicators for my needs ?
Basically when I get CPU time from statspack and parsetime_cpu (somehow) i can derive percentage usage.
btw how is 'CPU time' in statspack calculated ?
I'm running AIX DB 9.2.0.8 EE , can take historical data from statspack .
Regards.
Greg

Understanding statspack report(CPU time in top time events)

Hi,
I am using oracle 9.2.0.8 RAC on SUN solaris platform.I am trying to understand my DB statistics using the below statspack report.Can you please coment on the below report
My quetions/thoughts are:
1) CPU time is in the top timed events,Is that eman some need to do with CPU increase.Was CPU bottleneck?
2) Parse CPU to Parse Elapsd %: 80.28 .Is this means I am hard parsing most of the time.How can identify which queries doing more hard parses.what is mean by% Non-Parse CPU: 98.76
3) Memory Usage %: 96.25 96.64.It seems to be there is too much memory usage.Can you elaborate this usage about what could be the reasons for this to happen
4) global cache cr request is coming in the top wait evetns and top timed events.Is there some issue with RAC?
5) can you please explain about 5 CR Blocks Served (RAC) and 5 CU Blocks Served (RAC) and Top 5 ITL Waits per
Your help is appreciated!!
Load Profile
~~~~~~~~~~~~ Per Second Per Transaction
Redo size: 2,101,521.49 18,932.15
Logical reads: 91,525.82 824.54
Block changes: 6,720.68 60.55
Physical reads: 5,644.92 50.85
Physical writes: 464.97 4.19
User calls: 922.79 8.31
Parses: 342.37 3.08
Hard parses: 1.52 0.01
Sorts: 324.18 2.92
Logons: 2.66 0.02
Executes: 2,131.75 19.20
Transactions: 111.00
% Blocks changed per Read: 7.34 Recursive Call %: 78.48
Rollback per transaction %: 22.43 Rows per Sort: 15.89
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 99.66 Redo NoWait %: 100.00
Buffer Hit %: 93.86 In-memory Sort %: 100.00
Library Hit %: 99.95 Soft Parse %: 99.56
Execute to Parse %: 83.94 Latch Hit %: 99.79
Parse CPU to Parse Elapsd %: 80.28 % Non-Parse CPU: 98.76
Shared Pool Statistics Begin End
Memory Usage %: 96.25 96.64
% SQL with executions>1: 34.19 32.67
% Memory for SQL w/exec>1: 39.87 40.47
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
CPU time 10,406 42.54
db file sequential read 1,707,372 4,282 17.51
global cache cr request 2,566,822 2,369 9.68
db file scattered read 1,109,892 1,719 7.03
SQL*Net break/reset to client 17,287 1,348 5.51
Wait Events for DB: Instance:
-> s - second
-> cs - centisecond - 100th of a second
-> ms - millisecond - 1000th of a second
-> us - microsecond - 1000000th of a second
-> ordered by wait time desc, waits desc (idle events last)
Avg
Total Wait wait Waits
Event Waits Timeouts Time (s) (ms) /txn
db file sequential read 1,707,372 0 4,282 3 8.5
global cache cr request 2,566,822 3,356 2,369 1 12.8
db file scattered read 1,109,892 0 1,719 2 5.5
SQL*Net break/reset to clien 17,287 0 1,348 78 0.1
buffer busy waits 312,198 11 1,082 3 1.6
Message was edited by:
user509266

This statspack taken for 30 minutes interval.We have 16 CPU's.We never got ORA-4031 errors.It means you have 16 * 30 * 60 = 28,800 seconds CPU available during the interval but you only used 10,406. So you don't have a CPU problem.
For Statspack documentation, you can have a look to <ORACLE_HOME>/rdbms/admin/spdoc.txt, Metalink note 228913.1, Jonathan Lewis Scratchpad, books commended by Rajesh Kumar Yogi and also to http://www.oracle.com/technology/deploy/performance/index.html

Statspack : Top 5 Timed Events - CPU time

Hi,
I just get some statspack reports on my 10.2.0.2 database (HP-UX 11i).
I'm just surprise about the CPU time into the Top-5 events.
Top 5 Timed Events                                                    Avg %Total
~~~~~~~~~~~~~~~~~~                                                   wait   Call
Event                                            Waits    Time (s)   (ms)   Time
CPU time 4,263 97.3
latch: cache buffers chains                    197,925          42      0    1.0
log file parallel write                          8,982          22      2     .5
log file sync                                    8,620          22      3     .5
wait list latch free                               399           7     17     .2What does CPU time here ? Is it a problem here ?
Thanks in advance for your lights.

Hi,
it seems that your database experiences a high SQL workload. The section of statspack report called "Top SQLs by Buffer Gets" might give you an idea what SQLs caused this CPU workload.

CPU Time in Load Profile of STATSPACK

All,
I need a clarification on how CPU time is calculated...I have done few R&D,but i didn't get clear u'standing,but in SPDOC.txt(%ORACLE_HOME%\rdbms\admin\spdoc.txt ) as explained in below text:
===========================================================
Additionally, instead of the percentage calculation being the % Total
Wait Time (which is time for each wait event divided by the total wait
time), the percentage calculation is now the % Total Call Time.
Call Time is the total time spent in database calls (i.e. the total
non-idle time spent within the database either on the CPU, or actively
waiting).
We compute 'Call Time' by adding the time spent on the CPU ('CPU used by
this session' statistic) to the time used by all non-idle wait events.
i.e.
total call time = total CPU time + total wait time for non-idle events
The % Total Call Time shown in the 'Top 5' heading on the summary page
of the report, is the time for each timed event divided by the total call
time (i.e. non-idle time).
i.e.
previously the calculation was:
time for each wait event / total wait time for all events
now the calculation is:
time for each timed event / total call time
MY STATSPACK REPORT:
=============================================
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
CPU time 2,741 53.50
db file sequential read 299,449 1,063 20.75
db file scattered read 69,389 337 6.59
log file sync 43,220 334 6.53
log file parallel write 86,222 246 4.81
What is "total wait time for non-idle events" in the above definition...
I have good idea on interpreting the Report at basic level...
Please DONOT treat this as assignment or stuff like that...
Any help, would be great...
Regards,
~ORA

The time that you see in this report is a cumulative time for all the sessions that were running on this database, during the snap period.
What is "total wait time for non-idle events" in the above definition...As you know, not all wait events are idle in nature. F.ex. SQL*Net message from client wait event is idle event (to certain extent) but db file sequential read is not (as CPU needs to generate the address and perform other computation. All such events, where the CPU processing is still needed but is not directly servicing the end user request, contribute to the total time for non-idle events.

Urgt:How to identify TOP 5 SQL using more CPU time without using statspack

How to identify the TOP 5 SQL queries which are consuming more CPU time during the timespan of 24 hours for entire database. There are N number of users who have issued sql queries, out of which few users have disconnected and few user are still connected to the database(I need to consider all sessions). My database version is 9.0.1. I don't want to use statspack. Is there any way to identify TOP 5 SQL consuming more CPU time without affecting the performance of the database. Can any one help me on this? Its urgent!!. I don't want to use statspack becasue it degrades the performance and i cannot afford to run it for 24 hours.

You don't run statspack for 24 hours, that would infact be pointless...
Run statspack for say a 10 or 15 minute window during a particular "busy" period on your database. If you run it for longer then all the useful data will have been "averaged out". You want a snapshot in time, not an average over the day.

How to identify TOP 5 SQL consuming more CPU time without using statspack

How to identify the TOP 5 SQL queries which are consuming more CPU time during the timespan of 24 hours for entire database. There are N number of users who have issued sql queries, out of which few users have disconnected and few user are still connected to the database(I need to consider all sessions). My database version is 9.0.1. I don't want to use statspack. Is there any way to identify TOP 5 SQL consuming more CPU time without affecting the performance of the database. Can any one help me on this? Its urgent!!.

My database version is 9.0.1. I don't want
to use statspack. Is there any way to identify TOP 5
SQL consuming more CPU time without affecting the
performance of the database. Can any one help me on
this? Its urgent!!.I cant understand why you dont want to use statspack. As it is very easy to use and very quick to identify bottlenecks. Try using statspack. Its really wonderful.
Particularly in your case statspack is the best.
Regards,
Sanju.

Statspackの「CPU time」と「DB CPU」の違い

お世話になっております。
Statspackを取得し調査しているのですが、
下記の二つ項目のtime(s)がまったく一致しません。（桁が異なるほど）
①「Top 5 Timed Events」の「CPU time」
②「Time Model System Stats,SQL ordered by CPU」等の「DB　CPU」
この二つの項目はSQLに使用したCPU時間だと考えていました。
定義の違いをご存知の方がいらっしゃいましたら、教えていただけないでしょうか。
以上、宜しくお願い致します。

こんにちは。
英語記事ですが･･･
http://www.dba-oracle.com/m_db_cpu.htm
元ネタ
https://kr.forums.oracle.com/forums/thread.jspa?threadID=665376

Breakdown of CPU Time

Hi,
I have make a statspack about our database, and I upload about oraperf website.
But I don't understand "Breakdown of CPU Time"
Detail :
Parse CPU Time 1190 58.42%
Recursive CPU Time 1542 75.70%
Other CPU Time 18446744073709550921 -34.12%
Why The percentage is higher than 100% ?
Nicolas.

Well, you're getting a total of 100% if you include the -34.12% figure. There is clearly a bug in the computation-- you might ask the oraperf folks whether that's a bug in their application or the trace output from your database.
If you run tkprof on your trace file, that should include breakdowns of parse/execute time for each statement. If you see a lot of parsing, your application might benefit significantly by using bind variables appropriately.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Cpu time is high

In the below statspack report CPU time is very high.....how to voercome this prole....is there any other problem also pls suggest me.
OS:SUN Solris
DB=Oracle 9.2.0.6
STATSPACK report for
DB Name         DB Id    Instance     Inst Num Release     Cluster Host
ICAI          1372079993 icai12              2 9.2.0.6.0   YES     icai2
              Snap Id     Snap Time      Sessions Curs/Sess Comment
Begin Snap:        11 12-Sep-08 13:55:54      931       7.2
End Snap:        12 12-Sep-08 17:04:24      623       7.4
   Elapsed:              188.50 (mins)
Cache Sizes (end)
~~~~~~~~~~~~~~~~~
               Buffer Cache:     2,512M      Std Block Size:          8K
           Shared Pool Size:       608M          Log Buffer:        977K
Load Profile
~~~~~~~~~~~~                            Per Second       Per Transaction
                  Redo size:              1,026.01              8,844.68
              Logical reads:              4,270.92             36,817.17
              Block changes:                  5.28                 45.55
             Physical reads:                243.47              2,098.82
            Physical writes:                  0.41                  3.52
                 User calls:                 37.58                323.93
                     Parses:                  5.82                 50.19
                Hard parses:                  0.31                  2.65
                      Sorts:                  2.59                 22.29
                     Logons:                  0.07                  0.58
                   Executes:                 17.69                152.49
               Transactions:                  0.12
% Blocks changed per Read:    0.12    Recursive Call %:     41.69
Rollback per transaction %:   25.61       Rows per Sort:    100.12
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            Buffer Nowait %: 100.00       Redo NoWait %:    100.00
            Buffer Hit   %:   94.30    In-memory Sort %:    100.00
            Library Hit   %:   98.28        Soft Parse %:     94.72
         Execute to Parse %:   67.09         Latch Hit %:     99.93
Parse CPU to Parse Elapsd %:   54.11     % Non-Parse CPU:     99.75
Shared Pool Statistics        Begin   End
             Memory Usage %:   90.81   89.84
    % SQL with executions>1:   51.49   48.75
% Memory for SQL w/exec>1:   52.77   51.31
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~                                                     % Total
Event                                               Waits    Time (s) Ela Time
CPU time                                                       20,029    75.44
global cache cr request                           873,734       1,904     7.17
db file scattered read                            346,161       1,577     5.94
db file sequential read                           173,543       1,558     5.87
db file parallel read                              14,902         616     2.32

Sorry for being late....
I think there is only one or two query causing problem....is it true that if there is only one or two query causing problem that is if the query is taking near about 30% elaspsed time cpu does it have a impact on the performance of the db......
SQL ordered by Reads for DB: ICAI Instance: icai12 Snaps: 11 -12
-> End Disk Reads Threshold:      1000
                                                     CPU      Elapsd
Physical Reads Executions Reads per Exec %Total Time (s) Time (s) Hash Value
      1,097,317           11       99,756.1   39.8   386.68   1778.96 1585476974
SELECT NVL(TO_CHAR(A.DEH_APPLICATION_DT,'DD/MM/RRRR'), NULL ),NV
L(TO_CHAR(A.DEH_DT,'DD/MM/RRRR'), NULL )   FROM OT_DAK_ENTRY_HEA
D A,OT_DAK_ENTRY_DETL B,OT_FIRM_NAME_APPR_HEAD C WHERE A.DEH_SY
S_ID = B.DED_DEH_SYS_ID AND B.DED_DAK_SYS_ID = C.FNAH_DED_SYS_I
D AND C.FNAH_SYS_ID = (SELECT MAX(B.FNAH_SYS_ID)   FROM OT_FIR
        407,436            6       67,906.0   14.8   122.60    720.09 1414719916
UPDATE OM_MEM_REG_HEAD SET MRH_MRN=:b1 WHERE MRH_SYS_ID = :b2
        407,436            6       67,906.0   14.8   122.54    720.00 1414796677
UPDATE OT_DAK_ACTV_HISTORY SET DAH_REG_NO = :B1 WHERE DAH_REG_NO
= :B3 AND TRUNC(DAH_ACTV_ED_DT ) <= TRUNC(:B2 ) AND DAH_ACTV_ST
ATUS = 'C'
        288,612           23       12,548.3   10.5    61.05    312.13 3146526985
Module: JDBC Thin Client
BEGIN PACK_INSERT_INTERNET_TEST.IT_INSERT_MEM_ADD_CHG_REQ(:1,:2,
:3,:4,:5,:6,:7,:8,:9,:10,:11,:12,:13); END;
        110,742            1      110,742.0    4.0    35.17    172.63 1517630850
SELECT NVL(TO_CHAR(A.DEH_APPLICATION_DT,'DD/MM/RRRR'), NULL ),NV
L(TO_CHAR(A.DEH_DT,'DD/MM/RRRR'), NULL )   FROM OT_DAK_ENTRY_HEA
D A,OT_DAK_ENTRY_DETL B,OM_FIRM_OPENCLOSE_SO C WHERE A.DEH_SYS_
ID = B.DED_DEH_SYS_ID AND B.DED_DAK_SYS_ID = C.FSO_DED_SYS_ID
AND C.FSO_SYS_ID = (SELECT MAX(B.FSO_SYS_ID)   FROM OM_FIRM_OPE
         90,155          104          866.9    3.3   255.47    986.07 4142254844
SELECT LTRIM(RTRIM(DECODE(TIT_NAME,'MR.','CA.','MS.','CA.','MRS.
','CA.') || ' ' || MRH_FIRST_NAME || ' ' || MRH_MIDDLE_NAME
|| ' ' || MRH_SUR_NAME || ' ' || DECODE(MRH_APPR_UID, NULL ,
NULL ,DECODE(MRH_MEM_STATUS,2, NULL ,DECODE(MRH_FELLOW_STATUS_YN
,'Y','FCA','ACA'))) || DECODE(MRH_RESI_STATUS,'A','
         82,002            1       82,002.0    3.0   121.61    459.95 2335688323
SELECT 'X'   FROM OV_APPROVED_DOCUMENTS WHERE APPR_DOC_TXN_CODE
= :b1 AND APPR_DOC_NO = :b2 AND EXISTS (SELECT 'X'   FROM OT
DAKENTRY_HEAD A,OT_DAK_ENTRY_DETL B,OM_DAK C WHERE A.DEH_SYS_
ID = B.DED_DEH_SYS_ID AND A.DEH_SYS_ID = APPR_DOC_SYS_ID AND C
.DAK_TXN_CODE = :b3 AND C.DAK_CHANGE_TYPE IN ( 'F' ) AND B.DED
         65,494           12        5,457.8    2.4    23.18    137.86 3958290687
SELECT MEP_DOC_STATUS   FROM OT_MEM_EMPLOYMENT WHERE MEP_REF_SY
S_ID = :b1 AND MEP_REF_FROM = 'MG'
         60,028            3       20,009.3    2.2    12.59    157.78 2405844617
Module: JDBC Thin Client
INSERT INTO IT_ADD_DTL (ADD_DT_ACK_NO, ADD_DT_SR_NO, ADD_DT_MRN,
ADD_DT_TYPE, ADD_DT_LINE1, ADD_DT_LINE2, ADD_DT_LINE3, ADD_DT_L
INE4, ADD_DT_CITY_CODE, ADD_DT_OTHER_CITY, ADD_DT_PIN_CODE, ADD_
DT_TEL, ADD_DT_EMAIL, ADD_DT_OP_DT, ADD_DT_CL_DT, ADD_DT_CL_YN,
ADD_DT_INCHG_MRN, ADD_CORR_DT_LINE1, ADD_CORR_DT_LINE2, ADD_CORR
         60,022            6       10,003.7    2.2    12.31    155.97 3242469259
SQL ordered by Reads for DB: ICAI Instance: icai12 Snaps: 11 -12
-> End Disk Reads Threshold:      1000
SQL ordered by Gets for DB: ICAI Instance: icai12 Snaps: 11 -12
-> End Buffer Gets Threshold:     10000
-> Note that resources reported for PL/SQL includes the resources used by
   all SQL statements called within the PL/SQL code. As individual SQL
   statements are also reported, it is possible and valid for the summed
   total % to exceed 100
                                                     CPU      Elapsd
Buffer Gets    Executions Gets per Exec %Total Time (s) Time (s) Hash Value
     12,271,784           58      211,582.5   25.4   484.35   1453.46   17574787
SELECT /*+ INDEX (OM_COURSE_FEE OCF_CFC_CODE) */DISTINCT CF_COU
RSE_CODE   FROM OM_COURSE_FEE,OT_STUDENT_FEE_COL_HEAD,OT_STUDENT
FEECOL_DETL WHERE SFCH_SYS_ID = SFCD_SFCH_SYS_ID AND SFCD_FE
E_TYPE_CODE = CF_TYPE_CODE AND CF_COURSE_CODE IN ( 'PE1','PE2',
'CCT','CPT' ) AND SFCH_TXN_CODE = :b1 AND SFCD_SUBSCRBE_JOURNA
      7,064,924          120       58,874.4   14.6   102.74    226.01 3102119461
SELECT ROWID,AR_DT,AR_TXN_CODE,AR_NO,AR_AMD_NO,AR_REF_FROM,AR_RE
F_TXN_CODE,AR_REF_NO,AR_DAK_CODE,AR_DED_SYS_ID,AR_COMP_CODE,AR_A
CNT_YR,AR_AMD_DT,AR_AMD_UID,AR_AMD_RES_CODE,AR_REF_SYS_ID,AR_STU
D_SRN,AR_APPL_DT,AR_ISSUE_DT,AR_ENROL_FRM_COURSE,AR_ENROL_DT,AR_
JOURNAL_YN,AR_TYPE,AR_TITLE,AR_VACANCY_CODE,AR_MRH_MRN,AR_INDUST

CPU Time Wait Event

I am running perfstat in Oracle9i Enterprise Edition Release 9.2.0.4.0. When I create a perfstat report using the standard scripts I see a wait event called "CPU time." I don't understand what this means. The OEM server monitoring tool does not indicate that the CPU is being used more than 50%, often more like 20%. The top 5 wait events is below.
What does "CPU time" time mean?
the following top 5 wait events:
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
CPU time 2,200 61.88
db file sequential read 113,042 639 17.96
control file parallel write 9,345 471 13.24
log file sync 4,722 122 3.44
db file scattered read 13,375 67 1.87

Hi,
Below is part of my Statspack
```````
Snap Id Snap Time Sessions Curs/Sess Comment
Begin Snap: 13805 26-Mar-08 08:00:03 85 173.2
End Snap: 13806 26-Mar-08 09:00:05 98 154.4
Elapsed: 60.03 (mins)
Cache Sizes (end)
~~~~~~~~~~~~~~~~~
Buffer Cache: 1,024M Std Block Size: 8K
Shared Pool Size: 400M Log Buffer: 2,048K
Load Profile
~~~~~~~~~~~~ Per Second Per Transaction
Redo size: 183,878.75 16,898.36
Logical reads: 61,602.61 5,661.25
Block changes: 1,255.54 115.38
Physical reads: 7,370.56 677.35
Physical writes: 55.64 5.11
User calls: 341.11 31.35
Parses: 56.26 5.17
Hard parses: 0.32 0.03
Sorts: 56.43 5.19
Logons: 0.80 0.07
Executes: 712.67 65.49
Transactions: 10.88
% Blocks changed per Read: 2.04 Recursive Call %: 82.56
Rollback per transaction %: 9.29 Rows per Sort: 1043.63
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 99.98 Redo NoWait %: 100.00
Buffer Hit %: 88.06 In-memory Sort %: 100.00
Library Hit %: 99.96 Soft Parse %: 99.42
Execute to Parse %: 92.11 Latch Hit %: 99.95
Parse CPU to Parse Elapsd %: 69.60 % Non-Parse CPU: 99.64
Shared Pool Statistics Begin End
Memory Usage %: 89.25 89.26
% SQL with executions>1: 40.51 39.68
% Memory for SQL w/exec>1: 29.05 29.45
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
CPU time 9,272 43.73
db file sequential read 5,203,772 7,027 33.14
db file scattered read 2,198,721 1,547 7.30
log file parallel write 20,935 1,126 5.31
log file sync 10,277 759 3.58
``````````````````
From my observation I found that it seems CPU is bottneck on this Server. I have gathered few SQLs to find out whether any scope for tuning but still I believe that by reducing the cache size also I can divide the load or can say transfer the load from CPU to I/O. Am I correct or do I need to look over else ?
Thanks
MJ

Firefox is using large amounts of CPU time and disk access, and I need to know how to shut down most of this so I can actually use the browser.

Firefox is a very busy piece of software. It's using large amounts of CPU time and disk access. It puts my usage at low priority, so I have to wait for some time to be able to use my pointer or keyboard. I don't know what it uses all that CPU and disk access time for, but it's of no use to me. It often takes off with massive use of resources when I'm not doing anything, and I may not have use of my pointer for several minutes. How can I shut down most of this so I can use the browser to get my work done. I just want to use the web site access part of the software, and drop all the extra. I don't want Firefox to be able to recover after a crash. I just want to browse with a minimum of interference from Firefox. I would think that this is the most commonly asked question.

Firefox consumes a lot of CPU resources
* https://support.mozilla.com/en-US/kb/Firefox%20consumes%20a%20lot%20of%20CPU%20resources
High memory usage
* https://support.mozilla.com/en-US/kb/High%20memory%20usage
Check and tell if its working.

Cpu time is not getting displayed in explain plan

Hi All,
I am trying to analyze one query using explain plan .like below
1) explain plan for
SELECT /*+ parallel(tsp,8) use_hash( tsp tp) */ count(1)
FROM router tp,
receiver tsp
WHERE tp.rs = tsp.rp
AND creater_date >=to_date('04032009000000','ddmmyyyyhh24miss')
and tsp.XVF is not null
and tp.XVF is not null
and tp.role_name='BR';
2)@$ORACLE_HOME/rdbms/admin/utlxpls.sql
But i am getting only following columns in result .
| Id | Operation | Name | Rows | Bytes | Cost |
No Cpu time preset .
How can i extimate CPU time ?
Pls help
Thanks

am_73798 wrote:
I am trying to analyze one query using explain plan .like below
But i am getting only following columns in result .
| Id | Operation | Name | Rows | Bytes | Cost |
No Cpu time preset .
How can i extimate CPU time ?You need to mention your database version (4-digits, e.g. 9.2.0.8).
In Oracle 9i CPU costing is disabled by default, you need to gather WORKLOAD system statistics to enable the CPU costing.
In 10g CPU costing is enabled by default and uses default NOWORKLOAD system statistics if no WORKLOAD system statistics have been gathered. It can only be disabled by setting an undocumented parameter or by changing the OPTIMIZER_FEATURES_ENABLE parameter back to 9i compatibility.
You can check the status of your system statistics by running the following query in SQL*Plus:
column sname format a20
column pname format a20
column pval2 format a20
select
sname
, pname
, pval1
, pval2
from
sys.aux_stats$;Can you show us the actual (complete) output you get from "utlxpls.sql"? Use the \ tag to preserve formatting here:
\output
\will show asoutput
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/

Mail in 10.6.4 not usable: it consumes all CPU time and will not quit

Mail application does not work properly.
It eats up most of the available CPU time (till >300% on my machine), becomes unresponsive and will only quit when killed by a force quit in the Activity Monitor.
I have only two accounts set up. One Gmail account and a google apps one.
I used to synch with a Blackberry but now I synch directly through google apps.
The problem was sporadic at best at first but has become the usual behaviour now. Major change has been installing 10.6.4
I have switched to Thunderbird since Mail is not usable.
Tx for any hint on how to solve this issue

It seems to be a recurring issue with 10.6.4...there's probably not much mere mortals like us can do. I haven't found a solution. Try re-installing 10.6.4.

ITunes 10.6.3 hogs CPU time

I'll notice the system bogging down...and find that iTunes is use 80% or more of my CPU time in Activity Monitor. This did not happen with 10.6.1. Tips/tricks/suggestions would be appreciated.

I'll notice the system bogging down...and find that iTunes is use 80% or more of my CPU time in Activity Monitor.
There's a couple of different things that can hit folks in this way.
Doublechecking ... are you getting this when iTunes is in the mini player mode? Or in the main player?

CPU TIME on statspack

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