How To Tune Performance of OpenDS

Set the following JVM_ARGS in the file $OPENDS_INSTALL_DIR/config/java.properties for the start-ds command.

-Xms1536m -Xmx1536m -XX:NewSize=768m -XX:MaxNewSize=768m -XX:SurvivorRatio=5 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=12 -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+CMSIncrementalPacing -XX:+CMSParallelRemarkEnabled -XX:+UseParNewGC -XX:MaxPermSize=128m -XX:+UseTLAB -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled -XX:+DisableExplicitGC -XX:+HeapDumpOnOutOfMemoryError

Also to prevent the OPENDS HIGH CPU USAGE problem you must enable the beackendDB (berkley JE Database) cache by using the following command.Note that this command can be used while system is running up and have load.Tested enough :)

[root@ochemw bin]# ./dsconfig -h localhost --port 4444 -D "cn=Directory Manager" -w password-X -n set-backend-prop --backend-name userRoot --set db-cache-percent:50
For the details and cache percentage calculations you can refer to the opends perf. tuning page.