The APM Configuration and Administration Guide recommends that tess-default.properties and tess-customer.properties be identical across all Enterprise Managers in a cluster, including the MOM. All EMs will need to be restarted for any change to take effect.
If you have a 32-bit operating system, keep this property set to 'true' and allocate more heap to the JVM that runs the defect aggregation service.
To increase the amount of heap allocated to the JVM running the defect aggregation service, edit tess-default.properties or tess-customer.properties.
Locate the entry:
defects.jvmArgs= -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC -XX:+UseBiasedLocking -XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=90 -Dlog4j.configuration=log4j.properties -Xms256M -XX:ThreadStackSize=128
Increase heap by altering the setting: -Xms256M to a larger value.
After copying the modified .properties file to each EM, restart all of the EMs.