Performance advisors

 

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IBM WebSphere Application Server includes two performance advisors to help tune systems for optimal performance. These performance advisors use the PMI data to suggest configuration changes based on which settings might need to be adjusted for your environment.

The Runtime Performance Advisor runs in the application server process, while the other advisor runs in the Tivoli Performance Viewer. The following table outlines the difference between the two advisors:

  Runtime Performance Advisor Performance Advisor in Tivoli Performance Viewer
Location of execution Application server Tivoli Performance Viewer client
Location of tool Administrative console Tivoli Performance Viewer
Output SystemOut.log file and WebSphere run-time messages in WebSphere status panel in the administrative console Tivoli Performance Viewer graphical user interface
Frequency of operation Every 10 seconds in background When you select refresh in Tivoli Performance Viewer
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

For more detailed information about the performance advisors, see these topics:

Use the Performance Advisor in Tivoli Performance Viewer
The Performance Advisor in Tivoli Performance Viewer provides information to help you optimize performance. This topic describes how to configure and use the Performance Advisor.

Use the Runtime Performance Advisor
The Runtime Performance Advisor provides information to help you optimize performance. This topic describes how to configure and use the Runtime Performance Advisor.