WebSphere Application Server V7.0: Concepts ... - IBM Redbooks

7.9 WebSphere performance tools
When reviewing the application environment, you often need to delve deeper into
the behavior of the application than what is presented at the operating system
layer. This requires the use of specialized tools to capture the information.
WebSphere Application Server provides tools that allow the administrator to
gather information related to the performance of various components in the J2EE
environment. In this section, we discuss the following tool sets:
► Performance monitoring considerations on page 268
► Tivoli performance viewer on page 271
► WebSphere performance advisors on page 271
► WebSphere request metrics on page 273
7.9.1 Performance monitoring considerations
The Tivoli Performance Viewer is a monitoring tool that is used to capture data
presented through the WebSphere Application Server Performance Monitoring
Infrastructure (PMI) The PMI is a server-side monitoring component. WebSphere
PMI complies with the Performance Data Framework as defined in the J2EE 1.4
standard.
Configured through the Integrated Solutions Console, the PMI allows monitoring
tools to peer inside the WebSphere environment to capture specific details about
the application behavior. Using this interface, you are able to capture information
about the following resources:
► Application resources
– Custom PMI
– Enterprise bean counters
– JDBC connections counters
– J2C connections counters
– Servlets/JSPs counters
– SIP counters
– Web services counters
– ITCAM counters
– Any custom that runs in the environment
► WebSphere runtime resources
– JVM memory
– Thread pools
– Database connection pools
– Session persistence
– Dynamic caching
268 WebSphere Application Server V7.0: Concepts, Planning, and Design