You can configure user and logging settings of the Tivoli® Performance Viewer. Configuring the Tivoli Performance Viewer settings affects the performance of your application server.
Tivoli Performance Viewer monitors the performance activity of all servers on a node.
You can configure the activity monitoring of Tivoli Performance Viewer on a per-user basis. Any changes made to Tivoli Performance Viewer settings are only for the server being monitored and only affect the user viewing the data.
You can change the user and log Tivoli Performance Viewer settings in the administrative console.
Setting | Description |
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Refresh Rate | Specifies how frequently Tivoli Performance Viewer collects
performance data for a server from the Performance Monitoring Infrastructure
(PMI) service provided by that server. The default is 30 seconds. To collect performance data for the server more frequently, set the refresh rate to a smaller number. To collect performance data less frequently, set the refresh rate to a larger number. The allowed range is 5 to 500 seconds. |
Buffer Size | Specifies the number of entries to be stored for a server. Data displayed in Tivoli Performance Viewer is stored in a short in-memory buffer. After the buffer is full, each time a new entry is retrieved the oldest entry is discarded. The default buffer size is 40 entries. Supported values are 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100. The larger the buffer size, the more memory is consumed. Thus, specify a buffer size that allows you capture enough monitoring data for analysis without wasting memory storing unneeded data. |
View Data As | Specifies how counter values are displayed. Viewing options
include the following:
|
The refresh rate and buffer size settings combine to control how much temporal history you have for the application server. The default values for Refresh Rate (30 seconds) and Buffer Size (40 entries) provide you with a 20-minute history of the application server's performance. Changing one of these parameters affects the length of the temporal history.
The values you set for Refresh Rate and Buffer Size depend on your use of Tivoli Performance Viewer. To diagnose a known problem on a test machine, you might poll data more frequently while having a decreased buffer size. To monitor a production server, you might poll data less frequently and specify a buffer size depending on how much history you want. However, Tivoli Performance Viewer is not intended to be a full-time monitoring solution.
Setting | Description |
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Duration | Specifies the length of time, in minutes, that logging continues, unless Stop Logging is clicked first. Tivoli Performance Viewer is not intended as a full-time logging solution. |
Maximum File Size | Specifies the maximum size, in megabytes, of a single file. Note that Tivoli Performance Viewer automatically zips log files to save space and this parameter controls the pre-zipped file size and not the post-zipped, which is smaller. |
Maximum Number of Historical Files | Specifies the number of files Tivoli Performance Viewer writes before stopping. If Tivoli Performance Viewer reaches the maximum file size before the logging duration ends, it continues logging in another file, up to the maximum. If Tivoli Performance Viewer reaches the maximum number of historical files before the logging duration ends, Tivoli Performance Viewer deletes the oldest historical file and continues logging in a new file. The total amount of data that is stored is constrained by the Maximum File Size and Maximum Number of Historical Files parameters. |
File Name | Specifies the name of the log file. The server name and the time at which the log is started is appended to the log name to help users identify a log file. |
Log Output Format | Specifies whether Tivoli Performance Viewer writes log files as XML or in a binary format. Binary format provides a smaller log file when uncompressed and is recommended if space is a consideration. |