APAR status |
Closed with unknown close code.
| Error description
Customer was running a high stress testcase. After a period of
time they noticed a significant performance degradation. When
they looked at GC stats, the heap utilization was increasing
and the amount of time that the jvm was taking to do GC was
increasing.
An analysis of the java heap showed that there were a number of
HttpSession objects in the heap that were not getting garbage
collected.
KeyWords: slow performance heap growth GC Finalizer Local fixProblem summary
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* USERS AFFECTED: WebSphere Application Server -- Session *
* Manager Users *
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* PROBLEM DESCRIPTION: Performance slowdown is being caused *
* by delay in garbage collection of *
* Session Objects. *
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* RECOMMENDATION: *
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The Session Objects after getting timed out are eligible for
removal from the JVM by the garbage collection thread. Since
the session object overrides the finalize method the garbage
collecton thread takes longer to perform the removal operation
of the session object from the JVM leading to performance
degradation. Problem conclusion
This fix removes the overridden finalize method implementation
from the session object causing its removal from the JVM to take
place much more quickly. Temporary fixComments
APAR information | APAR number | PQ65717 | Reported component name | WEBSPHERE AE SO | Reported component ID | 5648C8402 | Reported release | 350 | Status | CLOSED | PE | NoPE | HIPER | NoHIPER | Submitted date | 2003-03-03 | Closed date | 2003-03-03 | Last modified date | 2003-03-26 |
APAR is sysrouted FROM one or more of the following: PQ67566
APAR is sysrouted TO one or more of the following:APAR is sysrouted FROM one or more of the following:PQ67566
Modules/Macros APAR is sysrouted TO one or more of the following:Modules/Macros
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Fix information |
Fixed component name | WEBSPHERE AE SO | Fixed component ID | 5648C8402 |
Applicable component levels | R400 PSY | UP |
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