Postmerge session event question
We have implemented a custom session event listener that utilizes the postmerge session event.
We have observed some unexpected behavior and were hoping that the product architect or manager could explain this behavior.
We have the following graph of objects:
A has a many-to-many privately owned collection of B
B in turn has a many-to-many privately owned collection of C
After commiting a transaction involving object A we observe:
postMerge event for A
postMerge event of each of A's privately owned Bs
yet NO postMerge event for any of B's privately owned Cs
Questions:
1) Is this the expected behavior?
2) Since we need to do some processing of Cs, we are using the postMerge event that occurs on Bs to update the Cs. Is this a safe/correct approach?
3) In a transaction that involved only updates to Cs, (no changes to A or B), would we see a postMerge event for each updated C?
Thanks in advance for any clarification you can provide.
...Steve
You could paste the results (tkprof ?) of the trace.
The "missing" time could be an uninstrumented wait --- i.e. a wait event that is not captured in v$session_event. Particularly because you are using external calls.
For example, see "Case Study 1" at http://blog.tanelpoder.com/2007/08/27/advanced-oracle-troubleshooting-guide-part-2-no-magic-is-needed-systematic-approach-will-do/
Hemant K Chitale
Similar Messages
-
I have a 88 MB table having no index on it.
select count(*) from ( select * from tbl where flag1=:1 and flag2=:2 and flag3=:3)The above sql is in the top cpu consuming session while I query "cpu used by session event"
how does above query different from :-
select count(*) from tbl where flag1=:1 and flag2=:2 and flag3=:3)version is 10.2.0.2
when tried to see the explain plan for both sql
it is showing same plan.
@?/rdms/admin/utlxpls
is showing full table scan
and with message cpu cost is not configured/shown
please help me understand this
which query is better and why?
why explain plan is not showing cpu cost?SQL> explain plan for
2 select count(*) from (select * from t1)
3 /
Explained.
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 3724264953
| Id | Operation | Name | Rows | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 3 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | | |
| 2 | TABLE ACCESS FULL| T1 | 301 | 3 (0)| 00:00:01 |
9 rows selected.
SQL> explain plan for
2 select count(*) from t1;
Explained.
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 3724264953
| Id | Operation | Name | Rows | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 3 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | | |
| 2 | TABLE ACCESS FULL| T1 | 301 | 3 (0)| 00:00:01 |
9 rows selected.
SQL> explain plan for
2 select count(*) from (select * from t1)
3 /
Explained.
SQL> @?/rdbms/admin/utlxpls
PLAN_TABLE_OUTPUT
Plan hash value: 3724264953
| Id | Operation | Name | Rows | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 3 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | | |
| 2 | TABLE ACCESS FULL| T1 | 301 | 3 (0)| 00:00:01 |
9 rows selected.
SQL>I see the same Execution Plan.
Edited by: Hemant K Chitale on Jul 23, 2009 11:34 PM -
WebDynpro ABAP - inter session events possible?
Hi Experts,
I have a ABAP-WebDynpro application with various tabstrips to show and maintain process data within a production process. Each tabstrip contains several data of a specific process step. At the beginning, very few data are already present. While production progresses, chemical analysis is being taken and machine data is gathered. Assoon as new data for the process step is available, a refresh should be performed.
Though not perfect in every aspect, we made this scenario work in a similar way in ABAP Dynpro by using inter session eventing (ISE). Is there a possibility to trigger events in WebDynpro cross-session - for example after adding data to the database?
Best regards
JensThere is no real cross session eventing available in Web Dynpro. The problem is two fold. First, UI updates can't be initiated by the server in HTTP (unlike the SAPGUI which does have a push mechanism to the client). This is a current limitaiton of HTTP itself and not something Web Dynpro related. So to trigger the phase model of Web Dynpro, something must occur on the client to trigger the server event. In NetWeaver 7.0 and 7.01 you have to use the timedTrigger UI element to acomplish this:
http://help.sap.com/saphelp_nw70ehp1/helpdata/en/da/a6884121a41c09e10000000a155106/frameset.htm
You then generally used a shared memory object (or even temporary database entries) to communicate data or events between to different processes. For instance a background job is running and places it status in a shared memory object attribute. The Web Dynpro can then fire a TimedTrigger every minute to check the value of this shared memory object attribute.
In NetWeaver 7.02 we improve this process with a new capability called the Web Dynpro Notification Service. Instead of the timedTrigger, we can simulate a push of data/events to the client using AJAX. We open an secondary server request to the ICM to check the status of an event. That way we don't have to disrupt the client side activity or incurre the full Web Dynpro Phase Model until we know a change in the status of our event has occured. Also since the status info is stored in the ICM Cache, you don't even have to fall into an ABAP Workprocess to check the status. -
When calling webservice Session event listener threw exception
Hi All,
I have Schdule the process to call webservice for 1 hour.
When it accessed It is throwing Exception But data send to Server and received response as true from webservice.
Exception details found in log file.
2007-12-04 01:00:36 StandardManager[npbpqa] Session event listener threw exception
java.lang.IllegalStateException: getAttribute: Session already invalidated
at org.apache.catalina.session.StandardSession.getAttribute(StandardSession.java:925)
at org.apache.catalina.session.StandardSessionFacade.getAttribute(StandardSessionFacade.java:124)
at org.apache.axis.transport.http.AxisHTTPSessionListener.destroySession(AxisHTTPSessionListener.java:43)
at org.apache.axis.transport.http.AxisHTTPSessionListener.sessionDestroyed(AxisHTTPSessionListener.java:72)
at org.apache.catalina.session.StandardSession.expire(StandardSession.java:623)
at org.apache.catalina.session.StandardSession.expire(StandardSession.java:572)
at org.apache.catalina.session.StandardManager.processExpires(StandardManager.java:746)
at org.apache.catalina.session.StandardManager.run(StandardManager.java:823)
at java.lang.Thread.run(Thread.java:534)
Can any one help me urgently.
Thanks in advance.
Venkat K
Edited by: venkat2007 on Dec 4, 2007 2:44 PMThe service is working fine from a web page that my coworker did. I have not installed soap UI yet, but I used it at my last job. Since I posted this I have a new computer, have installed BizTalk Server 2013 R2 and Visual Studio 2013 Premium.
This is what I've done...
Created a new Host called BizTalkServerApplication64 with the '32-Bit only' unchecked.
Created a new host instance using the new host.
Created a new Send Handler for both Adapters 'WCF-BasicHttp' and 'WCF-Custom' using the new host.
configured both Send Ports (WCF-BasicHttp and WCF-Custom) to use the new send handler.
Have tried binding the logical port to both basic and the custom ports.
Now I get a different error which is:
Error Description: System.ServiceModel.CommunicationException: An error occurred while receiving the HTTP response to http://lbenson/MDSVC2/Service1.svc. This could be due to the service endpoint binding not using the HTTP protocol. This could also be due
to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details. ---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. --->
System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host...
Any suggestions for this error? I'm not sure if this means I'm closer to getting it work or further.
Thanks for your help!
Jean
jRenae.s -
Session Timeout Question in EME
If I login to eManager Web and instead of logging out I just close the browser will I be logged out? Will the license be released? What is the session timeout for this and is it possible to set this value?
If you close the browser in e-Manager Enterprise Web instead of logging out there is a TimeOut that will release your license. This can be seen and is reported on in the e-Manager logs. By default the session TimeOut value is 30 minutes. You can find this and/or change this value by opening "<installdir>\Empirix\EmpAppServer\server\default\deploy\jbossweb-tomcat55.sar\conf\web.xml" in a notepad. Once the file is open, go the the ?Default Session Configuration? Section. Here you can change the TimeOut value. You will then need to save the file and restart the Empirix Application Service. The idle sessions are retired after the specified timeout is reached and the licenses are also checked upon this value. I hope this answers your questions.
-
Performance issue showing read by other session Event
Hi All,
we are having a severe performance issue in my database when we are running batch jobs.
This was a new database(11.2.0.2) and we are testing the performance by running some batch jobs. These batch jobs included some inserts and updates.
I am seeing read by other session in top 5 timed events and cache buffers chains in Latch Miss Sources section.
Please help me to solve this out.
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: 5605 29-Feb-12 03:00:27 63 4.5
End Snap: 5614 29-Feb-12 12:00:47 63 4.3
Elapsed: 540.32 (mins)
DB Time: 1,774.23 (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): 3.3 0.8 0.02 0.05
DB CPU(s): 1.1 0.3 0.01 0.02
Redo size: 55,763.8 13,849.3
Logical reads: 23,906.6 5,937.4
Block changes: 325.7 80.9
Physical reads: 665.6 165.3
Physical writes: 40.4 10.0
User calls: 60.7 15.1
Parses: 10.6 2.6
Hard parses: 1.1 0.3
W/A MB processed: 0.6 0.2
Logons: 0.1 0.0
Executes: 151.2 37.6
Rollbacks: 0.0 0.0
Transactions: 4.0
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 99.94 Redo NoWait %: 100.00
Buffer Hit %: 97.90 In-memory Sort %: 100.00
Library Hit %: 98.06 Soft Parse %: 90.16
Execute to Parse %: 92.96 Latch Hit %: 100.00
Parse CPU to Parse Elapsd %: 76.71 % Non-Parse CPU: 98.57
Shared Pool Statistics Begin End
Memory Usage %: 89.38 87.96
% SQL with executions>1: 97.14 95.15
% Memory for SQL w/exec>1: 96.05 92.46
Top 5 Timed Foreground Events
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Avg
wait % DB
Event Waits Time(s) (ms) time Wait Class
db file sequential read 14,092,706 65,613 5 61.6 User I/O
DB CPU 34,819 32.7
read by other session 308,534 1,260 4 1.2 User I/O
direct path read 97,454 987 10 .9 User I/O
db file scattered read 71,870 910 13 .9 User I/O
Host CPU (CPUs: 8 Cores: 8 Sockets: 8)
~~~~~~~~ Load Average
Begin End %User %System %WIO %Idle
0.43 0.36 13.7 0.6 9.7 85.7
Instance CPU
~~~~~~~~~~~~
% of total CPU for Instance: 13.5
% of busy CPU for Instance: 94.2
%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): 506.5 629.1
% Host Mem used for SGA+PGA: 7.28 7.53
Time Model Statistics
-> Total time in database user-calls (DB Time): 106453.8s
-> 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 105,531.1 99.1
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
DB time 106,453.8
background elapsed time 1,753.9
background cpu time 61.7
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 3,704,415
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
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 03:00:27 0.4 N/A N/A N/A N/A N/A
29-Feb 04:00:35 1.4 11.9 11.2 0.6 88.1 14.3
29-Feb 05:00:41 1.7 13.8 13.2 0.6 86.2 15.8
29-Feb 06:00:48 1.5 14.0 13.5 0.6 86.0 12.3
29-Feb 07:01:00 1.8 16.3 15.8 0.5 83.7 10.4
29-Feb 08:00:12 2.6 23.2 22.5 0.6 76.8 12.6
29-Feb 09:00:26 1.3 16.6 16.0 0.5 83.4 5.7
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
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 97.9% of Total DB time 106,453.79 (s)
-> Total FG Wait Time: 69,415.64 (s) DB CPU time: 34,818.79 (s)
Avg
%Time Total Wait wait
Wait Class Waits -outs Time (s) (ms) %DB time
User I/O 14,693,843 0 69,222 5 65.0
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
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 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
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
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
------------------------------------------------------------- -
General Design With Database and Session Bean Question
I have an application I am developing where users connect to individual databases located on a server. When they login an admin table is accessed which shows what databases they have permissions to. I am then storing the connection to the database in a backing bean. Hoping to use this connection throughout the session. Is this a good practice to have a users connection left open over the session? I can't create a database pool for each individual database and each user for that database.
If I can store that database connection in a session bean. How do I access that connection from another bean. Or from another java class? I am using Glassfish for my application server with JSF1.2. I have looked at resource injection but have not had any luck with sharing the session bean information.
Sorry if this is a trivial question. I have been a Java developer for years. But just starting developing webapps using JSF.
ThanksJuCobb2 wrote:
I am then storing the connection to the database in a backing bean. Hoping to use this connection throughout the session. Is this a good practice to have a users connection left open over the session? No it is not. Why should you do so? Always keep the lifetime of connection, statement and resultset as short as possible. -
Hi when I drag folders containing photos into Iphoto it creates an event. What I currently do is after the event is created, I select an event, I hit the + sign in the bottom left and create an album.
I like having my albums on the left side for quick access to my library of photos. The problem is that if I add 30 folders, 30 events are then created.
I have to manually create an album out of each event one at a time. Is there any way that once an event is created it automatically creates and album. So say that 10 events are created, 10 albums will appear on the left.
If I select a couple events and hit the + option and hit create an album, it will only create one album out of the events selected. I would like to select multiple events at one time and have multiple albums created instead of just one. How do I do that?
Is what I want to do possible? thanksWell let me answer a question with a question
Why have all your Events mimicked in Albums? IF you can find the pic in an Event, you can find it in an Album.
To say nothing of all the basics: If you have the year, month, day. Title, keywords, camera a model etc etc you can use any (and all) of these to find your pics too.
To merge Events: Simply drag one to another in the iPhoto Window.
Regards
TD -
Alter system set events Question
Version 10202 on AIX
sql> alter system set events '4030 trace name heapdump level 536870917; name errorstack level 3';
Questions about this statement..
what this command is doing, i guess creating tracefile for event 4030...& the location of trace file would be the current direcotry?
& how to setup same kind of event trace for other events, any tips....& what to check in tracefile for problem?The values for level I have record are 1, 2, 3, 8, and 32 so I am guessing the number shown is the address of a specific heap to be dumped. The address of a heap would potentially change with a change in the shared pool storage parameters. Where did you get the address value?
The dump should go to the user background dump destination and not the current directory.
PS - if you have metalink look at document: #218105.1 Introduction to ORACLE Diagnostic EVENTS
HTH -- Mark D Powell --
Message was edited by: MDP add PS to Metalink Doc
mpowel01 -
Hi Gurus
I have a question regarding of the meaning of some columns in the V$SESSION table. I wonder what does the values in the following columns means?
ROW_WAIT_O
ROW_WAIT_F
ROW_WAIT_B
TADDR
LOCKWAIT
I find out that these columns always have some values when my users unable to log into the application. Even I kill the session that have lockwait, other users are still unable to connect and it happens around once every 2 months.
Thanks for the answer in advanced
OuiV$SESSION
This view lists session information for each current session.
Column Datatype Description
SADDR
RAW(4 | 8)
Session address
SID
NUMBER
Session identifier
SERIAL#
NUMBER
Session serial number. Used to identify uniquely a session's objects. Guarantees that session-level commands are applied to the correct session objects if the session ends and another session begins with the same session ID.
AUDSID
NUMBER
Auditing session ID
PADDR
RAW(4 | 8)
Address of the process that owns this session
USER#
NUMBER
Oracle user identifier
USERNAME
VARCHAR2(30)
Oracle username
COMMAND
NUMBER
Command in progress (last statement parsed); for a list of values, see Table 3-3. These values also appear in the AUDIT_ACTIONS table.
OWNERID
NUMBER
The column contents are invalid if the value is 2147483644. Otherwise, this column contains the identifier of the user who owns the migratable session.
For operations using Parallel Slaves, interpret this value as a 4-byte value. The low-order 2 bytes of which represent the session number, and the high-order bytes the instance ID of the query coordinator.
TADDR
VARCHAR2(8)
Address of transaction state object
LOCKWAIT
VARCHAR2(8)
Address of lock waiting for; NULL if none
STATUS
VARCHAR2(8)
Status of the session: ACTIVE (currently executing SQL), INACTIVE, KILLED (marked to be killed), CACHED (temporarily cached for use by Oracle*XA), SNIPED (session inactive, waiting on the client)
SERVER
VARCHAR2(9)
Server type (DEDICATED| SHARED| PSEUDO| NONE)
SCHEMA#
NUMBER
Schema user identifier
SCHEMANAME
VARCHAR2(30)
Schema user name
OSUSER
VARCHAR2(30)
Operating system client user name
PROCESS
VARCHAR2(9)
Operating system client process ID
MACHINE
VARCHAR2(64)
Operating system machine name
TERMINAL
VARCHAR2(30)
Operating system terminal name
PROGRAM
VARCHAR2(48)
Operating system program name
TYPE
VARCHAR2(10)
Session type
SQL_ADDRESS
RAW(4)
Used with SQL_HASH_VALUE to identify the SQL statement that is currently being executed
SQL_HASH_VALUE
NUMBER
Used with SQL_ADDRESS to identify the SQL statement that is currently being executed
PREV_SQL_ADDR
RAW(4)
Used with PREV_HASH_VALUE to identify the last SQL statement executed
PREV_HASH_VALUE
NUMBER
Used with SQL_HASH_VALUE to identify the last SQL statement executed
MODULE
VARCHAR2(48)
Contains the name of the currently executing module as set by calling the DBMS_APPLICATION_INFO.SET_MODULE procedure
MODULE_HASH
NUMBER
The hash value of the above MODULE
ACTION
VARCHAR2(32)
Contains the name of the currently executing action as set by calling the DBMS_APPLICATION_INFO.SET_ACTION procedure
ACTION_HASH
NUMBER
The hash value of the above action name
CLIENT_INFO
VARCHAR2(64)
Information set by the DBMS_APPLICATION_INFO.SET_CLIENT_INFO procedure
FIXED_TABLE_SEQUENCE
NUMBER
This contains a number that increases every time the session completes a call to the database and there has been an intervening select from a dynamic performance table. This column can be used by performance monitors to monitor statistics in the database. Each time the performance monitor looks at the database, it only needs to look at sessions that are currently active or have a higher value in this column than the highest value that the performance monitor saw the last time. All the other sessions have been idle since the last time the performance monitor looked at the database.
ROW_WAIT_OBJ#
NUMBER
Object ID for the table containing the ROWID specified in ROW_WAIT_ROW#
ROW_WAIT_FILE#
NUMBER
Identifier for the datafile containing the ROWID specified in ROW_WAIT_ROW#. This column is valid only if the session is currently waiting for another transaction to commit and the value of ROW_WAIT_OBJ# is not -1.
ROW_WAIT_BLOCK#
NUMBER
Identifier for the block containing the ROWID specified in ROW_WAIT_ROW#. This column is valid only if the session is currently waiting for another transaction to commit and the value of ROW_WAIT_OBJ# is not -1.
ROW_WAIT_ROW#
NUMBER
The current ROWID being locked. This column is valid only if the session is currently waiting for another transaction to commit and the value of ROW_WAIT_OBJ# is not -1.
LOGON_TIME
DATE
Time of logon
LAST_CALL_ET
NUMBER
The last call
PDML_ENABLED
VARCHAR2(3)
This column has been replaced by column PDML_STATUS
FAILOVER_TYPE
VARCHAR2(13)
Indicates whether and to what extent transparent application failover (TAF) is enabled for the session:
NONE - failover is disabled for this session
SESSION - the client is able to fail over its session following a disconnect
SELECT - the client is able to fail over queries in progress as well
See Also:
Oracle9i Database Concepts for more information on TAF
Oracle9i Net Services Administrator's Guide for information on configuring TAF
FAILOVER_METHOD
VARCHAR2(10)
Indicates the transparent application failover method for the session:
NONE - failover is disabled for this session
BASIC - the client itself reconnects following a disconnect
PRECONNECT - the backup instance can support all connections from every instance for which it is backup
FAILED_OVER
VARCHAR2(3)
Indicates (YES|NO) whether the session is running in failover mode and failover has occurred
RESOURCE_CONSUMER_GROUP
VARCHAR2(32)
Name of the session's current resource consumer group
PDML_STATUS
VARCHAR2(8)
If ENABLED, the session is in a PARALLEL DML enabled mode. If DISABLED, PARALLEL DML enabled mode is not supported for the session. If FORCED, the session has been altered to force PARALLEL DML.
PDDL_STATUS
VARCHAR2(8)
If ENABLED, the session is in a PARALLEL DDL enabled mode. If DISABLED, PARALLEL DDL enabled mode is not supported for the session. If FORCED, the session has been altered to force PARALLEL DDL.
PQ_STATUS
VARCHAR2(8)
If ENABLED, the session is in a PARALLEL QUERY enabled mode. If DISABLED, PARALLEL QUERY enabled mode is not supported for the session. If FORCED, the session has been altered to force PARALLEL QUERY.
CURRENT_QUEUE_DURATION
NUMBER
If queued (1), the current amount of time the session has been queued. If not currently queued, value is 0.
CLIENT_IDENTIFIER
VARCHAR2(64)
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96536/ch3171.htm#1122127
Joel P�rez -
10.1.3, Session Edior, Specifying custom session event listener
When in 9.0.4.4, we can specify custom sesson event listener in session editor.
Using 10.1.3 mapping workbench/session editor, I haven't found a way of doing it. Is this supported?
Thanks.
HaiweiNever mind. After adding jar to the classpath, I now can specify custom sesson event listener in the session editor. Thanks.
-
Hello All,
I might be missing something, but I am trying to bind a session when a user logs
in and out of my web application in order to be able to actively track online usage,
however I can't seem to get it to work.
I would appreciate any help that may shed some light on the problem.
I invoke the bind listener in a servlet thus:
session.setAttribute("listener", listener);
I have a simple BindListener Class:
import javax.servlet.http.*;
public class BindListener implements HttpSessionBindingListener
public int numSessions = 0;
public BindListener()
public synchronized void valueBound(HttpSessionBindingEvent event)
numSessions++;
public synchronized void valueUnbound(HttpSessionBindingEvent event)
numSessions--;
public int getNumSessions()
return numSessions;
However when I call a jsp page to monitor the online connections with the command
BindListener listener = new BindListener();
listener.getNumSessions()
It always reports a 0 value even though I have serveral sessions running.
Can anyone help explain why the counter is not working?
I would extremely grateful of any assistance on this issue.
Thanks in advance.
Regards
Les,Greetings,
I would appreciate any help that may shed some light
on the problem.First, it's important to understand a couple things about binding listeners:
1. A session binding listener is an object that listens for its own binding; IOW, it receives notifications when it specifically is bound to or unbound from the session; and
2. A session binding listener is specific to the session to which it is bound.
I invoke the bind listener in a servlet thus:
session.setAttribute("listener", listener);After the container binds the specified listener instance to this particular session, it calls the object's valueBound method...
Conversely, when (after) the object is removed from the session by calling
session.removeAttribute( "listener" );or
session.invalidate(); // Which implicitly calls the above ;)then it's valueUnbound method is called.
I have a simple BindListener Class:
import javax.servlet.http.*;
public class BindListener implements
HttpSessionBindingListener
public int numSessions = 0;
public BindListener()
public synchronized void
valueBound(HttpSessionBindingEvent event)Synchronizing this method only keeps multiple threads from concurrently calling it on this instance... Since it's the current container instance that calls these (container callback) methods, there will (should) be only one thread calling it...
numSessions++;
}numSessions will only ever be 1 (at most), since this method only gets called when the instance is bound to the session - which is only when your user logs in. Again, session objects ('listener' or otherwise), unless persisted, exist only for the life of the current session...
public synchronized void
valueUnbound(HttpSessionBindingEvent event)
numSessions--;
}Refer again to the above. Incidentally, what are you trying to achieve with this?
public int getNumSessions()
return numSessions;
}Refer again to the above. :)
However when I call a jsp page to monitor the online
connections with the command
BindListener listener = new BindListener();This simply invokes the class' constructor and - most importantly in this case ;) - creates a new instance of the class, and...
listener.getNumSessions();
It always reports a 0 value even though I haveSince this is a new instance whose 'numSessions' member is initialized to '0', the accessor is reporting correctly.
To get an existing listener object for the current session use:
<jsp:useBean id="listener" scope="session" class="BindListener"/>...then one of:
<jsp:getProperty name="listener" property="numSessions"/>
<%-- or --%>
<%= listener.getNumSessions() %>Keep in mind, however, that the above only retrieves the listener object for, again, the current session and whose 'numSessions' will still only be '1' (as currently implemented ;).
serveral sessions running.A session is a reference to a client's life in the application (refer to thread http://forum.java.sun.com/thread.jsp?forum=13&thread=249978 for further discussion on "session life"); one session cannot access the (in memory ;) information of other sessions...
Can anyone help explain why the counter is not
working?Refer again to all the above. :)
I would extremely grateful of any assistance on this
issue.If your goal is to track "online usage" then you're on the right track. However, as explained, the current implementation will only count the current session. To keep track of all sessions for a user your bean needs to persist and re-load the current count statistics for the user. The following illustrates:
import java.io.*;
import java.util.*;
import javax.servlet.http.*;
* <p>Tracks user login counts. A count of user's accesses is stored
* in a file within the webapp space.</p>
* <p>NOTE: This class is intended only to illustrate a method for
* managing persistent session tracking.</p>
* @author Tony "Vee Schade" Cook, [email protected]
public class SessionTracker implements HttpSessionBindingListener
* <p>Creates a new session tracking instance.
* @param sessionFile the user specific session file.
public SessionTracker( File sessionFile )
this.sessionFile = sessionFile;
* <p>Loads current session count.
public void valueBound( HttpSessionBindingEvent event )
Properties data = new Properties();
try {
data.load( new FileInputStream( sessionFile ) );
numSessions = Integer.parseInt( data.getProperty( "count" ) );
catch( Exception ex ) {
/* Assume no persistent data, or corrupt/invalid...
* either way, accept default numSessions = 0
/* Remember this session too! ;)
numSessions++;
* <p>Stores current session count for later retrieval.
public void valueUnbound( HttpSessionBindingEvent event )
Properties data = new Properties();
data.setProperty( "count", Integer.toString( numSessions ) );
try {
data.store( new FileOutputStream( sessionFile ), sessionFile.toString() );
catch( Exception ex ) {
/* Sorry, Charley - "log" the error for the administrator.
ex.printStackTrace();
* <p>Returns current session count for this user.
public int getNumSessions()
return numSessions;
private File sessionFile;
private int numSessions;
}The above should actually be using a database for the persistence if you also want to be able to efficiently access the count statistics from a separate session. Yet, the above illustrates what is needed (session persistence) and should get you started in the right direction. :)
I hope this helps.
Thanks in advance.
Regards
Les,Regards,
Tony "Vee Schade" Cook -
Oracle Database Session events auditing
Hi,
I've have a unique audit requirement for which I want to design the solution. Kindly help me in this.
What I want to do is that whenever the user create a session, say through scott schema and perform whatever in this session,
it should be logged in the audit table. What I know about features that Oracle database provide for auditing like Mendatory.standard, value
and fined grain auditing does not fullfill exect the about requirement.
Like I can audit the user machine from which It login to database and other info through after log on trigger, but how can I log the information
what he did after login like performing specific actions.
Regards,
KamranWhat version of Oracle? Oracle supports over 200 auditing events, so basically if there is a system privilege you can audit it. If there is an object owned in a schema, you can audit access or attempts to modify it.
Check out the 11g docs for auditing (or your relevant version) http://docs.oracle.com/cd/E11882_01/network.112/e16543/auditing.htm#BCGIDBFI
You are going to have a lot of design work to understand your system and what is acceptable accesses, acceptable privileges, etc. and what is not. For example, you probably don't want to audit successful selects against a table when the application primarily does selects. You may only want to see unsuccessful select attempts audited. And you don't want a trigger to does this work for you. You want to turn auditing on (audit_trail=DB_EXTENDED for example) and allow the Oracle kernel to handle populating the audit trail. -
never mind...got it
Edited by: mbowles on Aug 27, 2009 6:03 AMTo answer your question no. For security reasons, you cannot retrieve a sessoin using its ID.
Is it an extremely secure piece of information?
If the servlet and applet are talking to the same web application, you could possibly pass the data via the application scope (have a map in application scope, keyed by the session ID, and put the value to pass in that)
Its not completely secure, because any servlet/jsp in the application can view that data, but it is a sidestep hack to accomplish what you wish :-) -
Click Event Question - VB6 SDK 6.5
A quick question for you guys:
On the A/R Invoice form, I have a UDF that exists as a combo box. I can trap the et_COMBO_SELECT event on that combo box just fine, however, I would like to generate a click event on the 'Name' field on the main form from the UDF et_COMBO_SELECT event. The problem I'm running into is that because the form that contains the UDF has a different UID from the actual A/R Invoice main form, I get an error when I try to perform the click event on the 'Name' field. The code I'm using is below. Any help would be appreciated.
Thanks,
Greg
'(A/R Invoice) Change value of eqp_DivisionCode global variable when combo select event triggers
If eqp_pVal.FormType = -133 And eqp_pVal.FormMode = fm_ADD_MODE And _
eqp_pVal.ItemUID = "U_Division" And eqp_pVal.EventType = et_COMBO_SELECT Then
Set eqp_frm = SBO_Application.Forms.Item(FormUID)
Set eqp_cmbDivision = eqp_frm.Items("U_Division").Specific
eqp_DivisionCode = eqp_cmbDivision.Selected.Value
End IfHi Greg,
if you want to access a User Defined Field on a System Form but in header level you need to approach it as follows:
If (pVal.EventType = et_FORM_LOAD And pVal.FormType = 139 And _
pVal.Before_Action = True) Then
Set oform = m_App.Forms.Item(FormUID)
Dim oUsrForm As SAPbouiCOM.Form
Dim num As Long
Dim UDFformUID As String
num = Right(FormUID, (Len(FormUID) - 2))
num = num + 1
UDFformUID = "F_" & num
Set oform = m_App.Forms.Item(UDFformUID)
oform.Items.Item("U_1").Specific.String = "Test"
End If
Regards,
Lisa Mulchinock
SAP SDK Consultant
Galway
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