JVM Configuration and Tuning

Recommended Core Settings

JVM Logging Options

The JVM can be configured to log details about garbage collection and classloading that may be helpful when analyzing portal performance.

# GC Logging
-verbose:gc
-XX:+PrintGCTimeStamps
-XX:+PrintGCDetails
-XX:+PrintTenuringDistribution
-XX:+PrintAdaptiveSizePolicy
-XX:AdaptiveSizePolicyOutputInterval=1
-Xloggc:/my/up/logs/gc.log

# Classloading Logging
-verbose:class

JVM Monitoring Options

# Enable JMX Remote Monitoring
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.password.file=/my/password
-Dcom.sun.management.jmxremote.access.file=/my/access

JVM Debugging Options

# Debuging
-Xdebug
-Xrunjdwp:transport=dt_socket,address=7000,server=y,suspend=n

Additional Resources

Having problems with these instructions?

Please send us feedback at uportal-user@lists.ja-sig.org