Network Deployment (Distributed operating systems), v8.0 > Tune performance > Obtaining advice from the advisors > Use the Performance and Diagnostic Advisor
View the Performance and Diagnostic Advisor recommendations
Runtime Performance Advisor uses Performance Monitoring Infrastructure (PMI) data to provide recommendations for performance tuning. 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:
- The WAS SystemOut.log log file.
- The Runtime Messages panel in the administrative console. To view this administrative page, click Troubleshoot > 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.New feature: Beginning in WAS v8.0 you can configure the server to use the HPEL log and trace infrastructure instead of using SystemOut.log , SystemErr.log, trace.log, and activity.log files or 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.New feature:
Use the Performance and Diagnostic Advisor
Use HPEL to troubleshoot applications