Tuning

Tuning involves adjusting application code, configurations, and system settings to improve performance.

To help administrators identify and maximize tuning opportunities, the product provides tools to suggest performance improvements.

[Version 5.0.2 and later]Performance Advisors

[Version 5.0.2 and later]IBM WebSphere Application Server includes two performance advisors to help tune systems for optimal performance. Both advisors use the PMI data to suggest configuration changes to Object Request Broker (ORB) service thread pools, Web container thread pools, connection pool size, persisted session size and time, prepared statement cache size, and session cache size. The Runtime Performance Advisor runs in the application server process, while the other advisor runs in the Tivoli Performance Viewer (TPV). The following summary chart outlines the difference between the two advisors. For more information, see the articles, Using the Runtime Performance Advisor and Using the Performance Advisor in Tivoli Performance Viewer.

[Version 5.0.2 and later]

  Runtime Performance Advisor Performance Advisor in Tivoli Performance Viewer (TPV)
Location of execution Application server TPV client
Location of tool Administrative console TPV
Output SystemOut.log file and WebSphere run-time messages in WebSphere status panel in the administrative console TPV graphical user interface (GUI)
Frequency of operation Every 10 seconds in background When you select refresh in TPV
Types of advice
  • ORB service thread pools
  • Web container thread pools
  • Connection pool size
  • Persisted session size and time
  • Prepared statement cache size
  • Session cache size
  • ORB service thread pools
  • Web container thread pools
  • Connection pool size
  • Persisted session size and time
  • Prepared statement cache size
  • Session cache size
  • Dynamic cache size
  • JVM heap size
  • DB2 Performance Configuration Wizard



Related tasks
Tuning performance parameter index



Searchable topic ID:   welc_tuning
Last updated: Jun 21, 2007 4:55:42 PM CDT    WebSphere Application Server Network Deployment, Version 5.0.2
http://publib.boulder.ibm.com/infocenter/wasinfo/index.jsp?topic=/com.ibm.websphere.nd.doc/info/ae/ae/welc_tuning.html

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