The Tivoli Performance Viewer (TPV) provides an easy way to store real-time data for system resources, WebSphere pools and queues, and applications in log files for later retrieval. You can start and stop logging while viewing current activity for a server, and later replay this data. Logging of performance data captures performance data in windows of time so you can later analyze the data.
Before you begin
This article assumes that one or more servers have been created and are running on the node, and that you have configured the TPV log settings. The log settings can affect performance and are described in detail in Using the Tivoli Performance Viewer. The TPV logging feature is not intended to be a full-time monitoring solution.Why and when to perform this task
You can study the sequence of events that led to a peculiar condition in the application server. First, enable TPV logging so performance data generated in the application server persists in a log file stored at a specific location. Later, using the replay feature in TPV, view the performance data that was generated in exactly the same chronological order as it was generated in real time, enabling you to analyze a prior sequence of events.You do not need to know the syntax and format in which log files are generated and stored. Do not edit log files generated by TPV; doing so can corrupt or destroy the performance data stored in the log files.
If monitoring for the node agent is enabled, the log file includes system data from the node agent so that data is available when you replay the log. If monitoring for the node agent is disabled, then that data is not available. By default, TPV starts monitoring the node agent whenever monitoring starts on a server in the node.
You create and view logs in the administrative console.
Steps for this task (dependent on configuration)
Rewind | Returns to the beginning of the log file. |
Stop | Stops the log at its current location. |
Play | Begins playing the log from its current location. |
Fast Forward | Loads the next data point every three (3) seconds. |
Fast Forward 2 | Loads ten data points every three (3) seconds. |
TPV automatically compresses the log file when finishes writing it. The log does not need to be decompressed before viewing it, though TPV can view logs that have been decompressed.
Related tasks
Configuring TPV settings
Monitoring performance with Tivoli Performance Viewer (TPV)
Related reference
Using the Tivoli Performance Viewer