IBM Tivoli Monitoring > Version 6.3 Fix Pack 2 > Installation Guides > Installation Guide > Performance tuning > Tivoli Data Warehouse > Summarization and Pruning Agent

IBM Tivoli Monitoring, Version 6.3 Fix Pack 2


Set the maximum Java heap size

The Summarization and Pruning Agent runs in a Java virtual machine (JVM), which uses the JDBC (Java Database Connectivity) interface to communicate with the warehouse database. If the maximum Java heap size of the JVM is set to a low value, performance can be degraded by frequent garbage collections.

The maximum Java heap size is controlled by the -Xmx option. By default, this option is not specified in the Summarization and Pruning Agent configuration file. If this option is not specified, the default value used by Java applies as follows:

The above values are from the IBM Developer Kit and Runtime Environment, Java Technology Edition, Version 6 Diagnostics Guide.

To set the size of maximum Java heap size for the Summarization and Pruning Agent, edit the configuration file (KSYENV on Windows, sy.ini on UNIX or Linux) and modify the KSZ_JAVA_ARGS variable as shown below:


Parent topic:

Summarization and Pruning Agent

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