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Release Notes › Installation Considerations › Improve Performance on WebSphere and AIX

Improve Performance on WebSphere and AIX

For a WebSphere installation on AIX, you can achieve better performance in the User Console by setting the maximum heap size.

Follow these steps:

  1. Locate the server.xml in the following location: 
    WAS_HOME/profiles/Profile/config/cells/Cell/nodes/Node/servers/Server
  2. Add maximumHeapSize="1000" to the jvmEntries element.

    You can use a higher value if necessary. For example, to set maximumHeapSize to 2 GB (2048 MB), you add it as shown in bold in the following excerpt from this file:

    <jvmEntries xmi:id="JavaVirtualMachine_1183122130078" verboseModeClass="false"
	verboseModeGarbageCollection="false" maximumHeapSize="2048"  verboseModeJNI="false" runHProf="false" hprofArguments="" debugMode="false" debugArgs="-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=7777" genericJvmArguments="">
      <systemProperties xmi:id="Property_1" name="com.ibm.security.jgss.debug" value="off" required="false"/>
      <systemProperties xmi:id="Property_2" name="com.ibm.security.krb5.Krb5Debug" value="off" required="false"/>
    </jvmEntries>