Java Heap Size problem? Help?

Question

Hello Everybody,
Now i'm facing very big problem.
I think, about 100 users access to our app, it is stopped.
My configuration below:
XMS_SUN_64BIT="16384"
export XMS_SUN_64BIT
XMS_SUN_32BIT="256"
export XMS_SUN_32BIT
XMX_SUN_64BIT="32768"
export XMX_SUN_64BIT
XMX_SUN_32BIT="512"
export XMX_SUN_32BIT
XMS_JROCKIT_64BIT="16384"
export XMS_JROCKIT_64BIT
XMS_JROCKIT_32BIT="256"
export XMS_JROCKIT_32BIT
XMX_JROCKIT_64BIT="32768"
export XMX_JROCKIT_64BIT
XMX_JROCKIT_32BIT="6144"
export XMX_JROCKIT_32BIT
if [ "${JAVA_VENDOR}" = "Sun" ] ; then
     WLS_MEM_ARGS_64BIT="-Xms16384m -Xmx32768m -XX:NewSize=640m -XX:MaxNewSize=640m -XX:SurvivorRatio=16"
     export WLS_MEM_ARGS_64BIT
     WLS_MEM_ARGS_32BIT="-Xms16384m -Xmx32768m -XX:NewSize=640m -XX:MaxNewSize=640m -XX:SurvivorRatio=16"
     export WLS_MEM_ARGS_32BIT
else
     WLS_MEM_ARGS_64BIT="-Xms16384m -Xmx32768m -XX:NewSize=640m -XX:MaxNewSize=640m -XX:SurvivorRatio=16"
     export WLS_MEM_ARGS_64BIT
     WLS_MEM_ARGS_32BIT="-Xms16384m -Xmx32768m -XX:NewSize=640m -XX:MaxNewSize=640m -XX:SurvivorRatio=16"
     export WLS_MEM_ARGS_32BITI installed on linux 64bit, jrocket 64bit, 64GB ram only weblogic running.
How can i configure JVM?
Please help.
BR,
Eba

Answer 1

There are different examples given here: http://middlewaremagic.com/weblogic/?page_id=7132
In the setDomainEnv file you can use USER_MEM_ARGS to override the memory argument, for example,
if [ "${JAVA_VENDOR}" = "Oracle" ] ; then
     JAVA_HOME="${BEA_JAVA_HOME}"
     export JAVA_HOME
else
     if [ "${JAVA_VENDOR}" = "Sun" ] ; then
          JAVA_HOME="${SUN_JAVA_HOME}"
          export JAVA_HOME
     else
          JAVA_VENDOR="Oracle"
          export JAVA_VENDOR
          JAVA_HOME="/home/weblogic/jrockit-jdk1.6.0_29-R28.2.2-4.1.0"
          export JAVA_HOME
     fi
fi
if [ "${SERVER_NAME}" = "" ] ; then
     SERVER_NAME="AdminServer"
     export SERVER_NAME
fi
if [ "${SERVER_NAME}" = "AdminServer" ] ; then
     # JMX configuration for JRockit
        JMX_OPTIONS="-Djava.rmi.server.hostname=192.168.1.150 -Xmanagement:ssl=false,authenticate=false,port=7091,autodiscovery=true"
        export JMX_OPTIONS
        # Memory arguments for JRockit
        USER_MEM_ARGS="-jrockit -Xms512m -Xmx512m -Xns128m -XXkeepAreaRatio:25 -Xgc:pausetime -XpauseTarget:200ms -XX:+UseCallProfiling -XX:+UseLargePagesForHeap ${JMX_OPTIONS}"
        export USER_MEM_ARGS
fiAbove an example is shown for JRockit. Xms and Xmx can be set accordingly (with a hundred users 4096m would probably be enough).