Weblogic getting off/shutdown by own sometimes

Question

I have some problem in my production server. The server using app server weblogic 8.1, jrockit-R27.5.0-jdk1.4.2_16, oracle 9..
the prob is sometimes my production application getting slow down and when i check the weblogic getting off/shutdown by own self..
and a part error say "Out off memory....", i didn't know what memory they purpose..
I just think are they purpose is the memory configuration in "startWeblogic.sh"
and my configuration like this;
- MEM_ARGS="-Xms1536m -Xmx1536m -XgcPrio:deterministic -XpauseTarget=30ms -Xmanagement"
can someone tell me about the utility of
- MEM_ARGS?
- Xms1536m?
- Xmx1536m?
- XgcPrio?
- XpauseTarget?
- Xmanagement?
and i read "-XX:permsize=256M -XX:Maxpermsize=256M" in forum..tell me too this setting utility?
or maybe having other cause that make this prob.
I'm newbie in weblogic!
Thanks,
Atan S.
Edited by: 784614 on Jul 27, 2010 3:04 AM

Answer 1

Hello
It seems that memory you assigned for the jvm is not enough or your application needs to be tunned.
MEM_ARGS--Memory arguments
- Xms1536m---Minimum and initial memory which jvm use
- Xmx1536m--Max memory which jvm use
-XgcPrio: sets a dynamic garbage collection mode. This garbage collector combines all types of garbage collection heuristics and optimizes the performance accordingly. When running this garbage collector, you only need to determine whether your application responds best to optimal memory throughput during collection or minimized pause times. The dynamic garbage collector will then adapt its choice of collector type, in runtime, to what is suiting your application the best.
-Xmanagement
This option starts the JRockit JVM concurrently with the management server and allows you to either enable and configure or explicitly disable security features such as SSL encryption and authentication.
For more information, you can view this link:
http://download.oracle.com/docs/cd/E13150_01/jrockit_jvm/jrockit/jrdocs/refman/optionX.html#wp999527