[jboss-user] [Performance Tuning] - Generall Memory Question
Andi Beckar
do-not-reply at jboss.com
Fri Apr 1 04:32:03 EDT 2011
Andi Beckar [http://community.jboss.org/people/abeckar] created the discussion
"Generall Memory Question"
To view the discussion, visit: http://community.jboss.org/message/597091#597091
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Hi there,
could anyone please explain the following to me.
Settings of my JVM: (jboss4.4.2 - java 1.5.0_10)
"-Xms128m -Xmx1536m -XX:MaxPermSize=512m -verbose:gc -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000"
# should be 2048MB
And this is what i see when the Machine is running a few hours:
--- snip cmd top ---
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7401 jboss 25 0 2802m 1.9g 291m S 39 11.8 33:14.50 java
--- snip cmd top END ---
why are the "RES" and the "VIRT" Mem even higher than my Setting tells the JVM to be ?
and how many jboss instances, with the above described JVM Settings, can i run on a single machine with 8GB RAM with the goal not to come in any SWAP Situations.
Thanks
Andi ;)
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