IBM Support

How to Optimize TM1 Memory management on AIX

Question & Answer


Question

Tm1 web/tm1 applications it taking up a lot of memory and not releasing it. How do I optimize memory management on my AIX machine?

Cause

garbage collection is set to gencon

Answer

In order to optimize memory management of tm1 use balanced garbage collection instead of gencon.

Balanced garbage collection was introduced in IBM SDK Java Technology Edition Version 7
Refer to the following documentation.
http://www-01.ibm.com/support/docview.wss?uid=swg21516002

In order to enable balanced garbage collection:
Navigate to /bin64/startup_pmpsvc.sh file
This can be modified either of the following lines:

CATALINA_OPTS="$PROTOCOL $JAVA_64BIT_OPTS $JAVA_IBM_OPTS $DISP_OPTS
$UDECODER_OPTS $JMX_OPTIONS $KEYSTORE_OPTIONS -Xmx${MEM}m $MAX_NEW_SIZE
$NEW_SIZE $MAX_PERM_SIZE -Xgcpolicy:balanced"
or
JMX_OPTIONS="-Dcom.sun.management.jmxremote.port=7999
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=true
-Dcom.sun.management.jmxremote.password=false
-Djmx.remote.x.server.connection.timeout=1000 -Xgcpolicy:balanced"

Once this change has been made restart the application server.

Useful resources for IBM monitoring and diagnostic tools
http://www.ibm.com/developerworks/java/jdk/tools/gcmv/

[{"Product":{"code":"SS9RXT","label":"Cognos TM1"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Component":"TM1","Platform":[{"code":"PF002","label":"AIX"}],"Version":"10.2;10.2.2","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
15 June 2018

UID

swg21882866

Page Feedback