Viewing the Performance and Diagnostic Advisor recommendations

Runtime Performance Advisor uses Performance Monitoring Infrastructure (PMI) data to provide recommendations for performance tuning.

About this task

The Performance and Diagnostic Advisor uses Performance Monitoring Infrastructure (PMI) data to provide recommendations for performance tuning. Running in the Java virtual machine (JVM) of the application server, this advisor periodically checks for inefficient settings, and issues recommendations as standard product warning messages.

Procedure

The Performance and Diagnostic Advisor recommendations are displayed in two locations:
  1. The WebSphere® Application Server SystemOut.log log file.
  2. The Runtime Messages panel in the administrative console. To view this administrative page, click Troubleshooting > Runtime Messages > Runtime Warning.

Example

The following log file is a sample output of advice on the SystemOut.log file:
[4/2/04 15:50:26:406 EST] 6a83e321 TraceResponse W CWTUN0202W: 
Increasing the web container thread pool Maximum Size to 48 
might improve performance. 

Additional explanatory data follows.

Average number of threads: 48.

Configured maximum pool size: 2.

This alert has been issued 1 time(s) in a row. 
The threshold will be updated to reduce the 
overhead of the analysis.
Note: This topic references one or more of the application server log files. As a recommended alternative, you can configure the server to use the High Performance Extensible Logging (HPEL) log and trace infrastructure instead of using SystemOut.log , SystemErr.log, trace.log, and activity.log files on distributed and IBM® i systems. You can also use HPEL in conjunction with your native z/OS® logging facilities. If you are using HPEL, you can access all of your log and trace information using the LogViewer command-line tool from your server profile bin directory. See the information about using HPEL to troubleshoot applications for more information on using HPEL.
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Last updated: April 17, 2014 10:32 PM CDT
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