Hi Kristof,
there is no such mechanism as far as I know. Instead of terminating
the
threads that are idling, they are suspended, in order to be resumed if
required.
They could be self-terminating, but creating a new thread is quite
resource intensive and it is better to reuse existing threads (in
nearly
every case). This is most likely the reason why the number does never
decrease.
I assume that you will have the same results if creating a new empty
WebObjects Application if refreshing its main page as fast as possible
in the browser (maybe a Thread.sleep(1000) will be required every
time a
session is created in order to enforce "concurrency").
Andri
Kristof Cossement <kristof.cossem...@nss.be> schrieb am Mittwoch,
14. Oktober
2009 um 14:06 in Nachricht
<ae12cf24-ffe4-41cc-afe8-5443e1d69...@nss.be>:
Hi all,
when deploying a webobjects app, we can see the min and max number of
WOWorkerThread specified by variables 'WOWorkerThreadCountMin' and
'WOWorkerThreadCountMax'
root 43233 0.1 1,5 2612824 498428 ?? R Mi10am
160:15.03 /usr/bin/java -XX:NewSize=2m -Xmx64m -Xms32m -
DWORootDirectory=/System -DWOLocalRootDirectory= -DWOUserDirectory=/
System/Library/WebObjects/JavaApplications/wotaskd.woa -
DWOEnvClassPath= -DWOApplicationClass=Application -DWOPlatform=MacOS
-
Dcom.webobjects.pid=43233 -Xms512m -Xmx2048m -DWOHost=192.168.11.8 -
DDatabasePoolSize=20 -classpath WOBootstrap.jar
com.webobjects._bootstrap.WOBootstrap -WOPort 12346 -WOCachingEnabled
YES -WODebuggingEnabled NO -WOOutputPath /Library/WebObjects/Logs/
AdvitServer-1 -WOAutoOpenInBrowser NO -WOAutoOpenClientApplication NO
-
WOLifebeatInterval 30 -WOLifebeatEnabled YES -
WOLifebeatDestinationPort 1085 -WOAdaptor WODefaultAdaptor -
WOWorkerThreadCount 8 -WOListenQueueSize 128 -WOWorkerThreadCountMin
16 -WOWorkerThreadCountMax 256 -NSProjectSearchPath () -
WOSessionTimeOut 3600 -WOApplicationName AdvitServer
-WOMonitorEnabled
YES -WONoPause YES -DWOHost=192.168.11.8 -DDatabasePoolSize=20
At some point, the number of threads in my application is 326, of
which 256 of them are WOWorkerThread's (dumped the threads with
jstack)
Even if load decreases, the 256 WOWorkerThread's do not disappear
anymore, it seems once created, they don't get released anymore.
Is there a mechanism in WebObjects that should release
WOWorkerThread's when not needed anymore ?
greetz
Kristof
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