JVMArguments - cws-khuntly/WebSphere GitHub Wiki

date: 2025-05-08 13:44:59 created: 2025-05-08 13:34:15 categories:

  • WebSphere / Server Build / Application Server / JVM Configuration

Generic JVM Arguments


-Dibm.stream.nio=true -Djava.io.tmpdir=${WAS_TEMP_DIR} -Xdump:stack:events=allocation,filter=#10m -Xgcpolicy:gencon -verbose:gc -Xverbosegclog:${SERVER_LOG_ROOT}/verbosegc.%Y%m%d.%H%M%S.%pid.txt,20,10000

-XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=10M -XX:-TraceClassUnloading -Dcom.ibm.websphere.alarmthreadmonitor.threshold.millis=40000

-Xmns512M -Xmnx512M -XX:MaxDirectMemorySize=256000000 -Xshareclasses:none -Dsun.reflect.inflationThreshold=0 -Djava.security.egd=file:/dev/./urandom -Dcom.sun.jndi.ldap.connect.pool.maxsize=200

-Dcom.sun.jndi.ldap.connect.pool.prefsize=200 -Dcom.sun.jndi.ldap.connect.pool.timeout=3000 -Djava.net.preferIPv4Stack=true -Dsun.net.inetaddr.ttl=600 -Djava.awt.headless=true -Dlog4j2.formatMsgNoLookups=true

-Xjit:iprofilerMemoryConsumptionLimit=67108864 -Xcodecache20m -Dcom.ibm.xml.xlxp.jaxb.opti.level=3 -Dcom.ibm.cacheLocalHost=true -XtlhPrefetch -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=${SERVER_LOG_ROOT}/heapdump.%Y%m%d.%H%M%S.%pid.txt


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