Hi,
We have configured Liferay servers on JBoss AS 7.1.1. We have two environments Stage and Prod which are pretty much identical in terms of the hardware and software. However we are seeing some heavy swapping happening on the Prod servers. About a few hours after the servers are started they start swapping memory and this is how it read (as below):
Memory Used Total Percentage
============================
Physical 4079M 7872M 51%
Actual 3630M 7872M 46%
Swap 878M 2047M 42%
This is not a good sign for us. The JAVA_OPTS setting in standalone.conf is as below
JAVA_OPTS="$JAVA_OPTS -Dfile.encoding=UTF-8 -Djava.net.preferIPv4Stack=true -Duser.timezone=GMT -server -XX:NewSize=700m -XX:MaxNewSize=700m -Xms2048m -Xmx4096m -XX:MaxPermSize=1536m -XX:SurvivorRatio=6 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=15 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:ParallelGCThreads=16 -XX:+CMSCompactWhenClearAllSoftRefs -XX:CMSInitiatingOccupancyFraction=85 -XX:+CMSScavengeBeforeRemark -XX:+CMSConcurrentMTEnabled -XX:ParallelCMSThreads=2"
There are 2 nodes with 8 GB of RAM each
I found a thread which mentioned that the -Xms and -Xmx should ideally have the same values. This is the thread https://community.jboss.org/message/221207
Any help on this is really appreciated. I