Configuration weblogic server script for profiling by YourKit

You have to add in setDoaminEnv.sh the followed changes:

PRODUCTION_MODE="true"

export PRODUCTION_MODE

yourkitFlag="true"

export yourkitFlag

debugFlag="true"

export debugFlag

specialFlag="false"

export specialFlag

DOMAIN_PRODUCTION_MODE="true"

export DOMAIN_PRODUCTION_MODE

...

...

if [ "${JAVA_VENDOR}" = "Sun" ] ; then

export JAVA_VM="-server"

MEM_ARGS="-Xms1024m -Xmx1024m -XX:+AggressiveHeap -XX:+UseAdaptiveSizePolicy -XX:MaxPermSize=128m"

if [ "$yourkitFlag" = "true" ]; then

MEM_ARGS="-Xms1024m -Xmx1024m -XX:MaxPermSize=128m"

fi

export MEM_ARGS

if [ "${PRODUCTION_MODE}" = "" ] ; then

MEM_DEV_ARGS="-XX:CompileThreshold=8000 -XX:PermSize=32m "

export MEM_DEV_ARGS

fi

fi

...

...

# PROFILING SUPPORT

if [ "$JAVA_VENDOR" = "Sun" ]; then

if [ "$yourkitFlag" = "true" ]; then

export PRE_CLASSPATH="${PRE_CLASSPATH}${CLASSPATHSEP}/data/yjp/yjp-controller-api-redist.jar"

export LD_LIBRARY_PATH="/data/yjp:$LD_LIBRARY_PATH"

JAVA_PROFILE="${JAVA_PROFILE} -Xrunyjpagent:port=9999"

# uncomment if you use java 5
# JAVA_PROFILE="${JAVA_PROFILE} -agentlib:yjpagent=port=9999"
export JAVA_PROFILE

fi

fi

SERVER_CLASS="weblogic.Server"

export SERVER_CLASS

...

4 steps to see the memory leek

each session is 3.2 MB

Analyze memory snapshot by YourKit

I chose "Path from GC Roots" for NodeList


then I chose "Select Objects" for MemorySessionData