[jboss-user] [Performance Tuning] - Re: 100% CPU usage with lots of memory

DeanoUK do-not-reply at jboss.com
Wed Mar 19 09:37:12 EDT 2008


Ok so we've had this running for around 12 hours+ and we're seeing similar issues.

Receiving the following (over and over):

[GC 2515286K->2130638K(5238528K), 0.0748890 secs]
  | [GC 2515406K->2137619K(5237440K), 0.0824530 secs]
  | [GC 2521619K->2144601K(5237312K), 0.0933110 secs]
  | [GC 2528601K->2151535K(5236608K), 0.0912180 secs]
  | [GC 2533231K->2151543K(5237120K), 0.0885810 secs]
  | 

Using the settings you suggested:

  | JAVA_OPTS="$JAVA_OPTS -Xms5g -Xmx5g -XX:MaxNewSize=384m -XX:NewSize=384m -XX:Per
  | mSize=512m -XX:MaxPermSize=1g -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.
  | dgc.server.gcInterval=3600000 -Djava.awt.headless=true -d64 -verbose:gc"
  | 

After some time, the CPU was sticking around 50% (even when there was no activity) then during the time above it rose to 75% and seems to be stuck there...see JConsole output here:
http://www.allstarconsultants.com/jconsole1.jpg

Any further help would be appreciated :-/

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