3.2 Overview of statistics collection functionality
This section provides an overview of monitoring the operating information about the J2EE server and batch server by using statistics files.
Using the statistics collection functionality, you can monitor the operating status of a J2EE server and a batch server periodically and can obtain the statistics such as server performance and resource information in a statistics file. Operating information about the functions executed on the J2EE server and batch server is periodically output to statistics files. A statistics file is created for each function of the J2EE server. The information output to statistics files can be used to check the operational statuses of the J2EE server and batch server, look at the operating results statistically, and tune the server configuration parameters.
The information output to statistics files includes the number of Full GC occurrences and the number of pending requests for each URL group. By monitoring either of these numbers, a message (threshold event) can be output when the number exceeds the threshold. You can issue a management event using the output message, and can specify settings to automatically execute the required processes corresponding to this alert. For details on setting the automatic execution of processes with Management events, see the section 9.4 Settings for automatic execution of processes by management events.
You can use the following functionality by monitoring the statistics:
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Output the statistics
You can output the obtained statistics in a statistics file. For details on the output of statistics files, see 3.3 Statistics File Output Functionality.
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Issue an event
You can set a threshold value for the monitoring targets and issue an event when the monitoring targets exceed this threshold value. For details on issuing the events, see 3.4 Event issuing functionality.
When monitoring the statistics, you use the statistics file described in this chapter for normal operations. When you want to obtain more detailed information than the information obtained in the statistics file, only in that case you use the management commands to monitor the statistics. For details on the monitoring statistics using the management commands, see 8.2 Overview of statistics output using management commands.