Hitachi

JP1 Version 12 JP1/Automatic Job Management System 3 System Design (Configuration) Guide


3.4.8 Estimating the size of performance log files

This subsection explains how to estimate the size of performance log files.

Performance log files are binary-format log files that are output if the performance report output function is enabled. The data recorded in performance log files can be exported to CSV files by using the ajsreport command. For details about the performance report output function, see 5.3.1 Overview of the performance report output function in the JP1/Automatic Job Management System 3 Administration Guide.

The following information is output to the performance log files:

For the performance log files, the minimum period for which data is retained in performance log files can be specified by using the AJSREPORTSTOREDAYPERIOD environment setting parameter. If the scheduler service is not running or the number of jobs being run is fewer than expected, the data might be retained longer than the specified number of days. In an environment in which the ajsreport command is periodically run to output CSV files, you do not need to lengthen the data retention period. For details about the AJSREPORTSTOREDAYPERIOD setting parameter, see 20.4.2(116) AJSREPORTSTOREDAYPERIOD in the JP1/Automatic Job Management System 3 Configuration Guide.

The maximum size of performance log files is determined by the value specified for the AJSREPORTSTOREDAYPERIOD environment setting parameter. You can calculate the maximum size of performance log files by using the following formula:

The maximum size of performance log files (units: kilobytes) =

86,400 x value-of-AJSREPORTSTOREDAYPERIOD-environment-setting-parameter (units: days)

Example:

If the data in a performance log file is retained for at least 14 days, the maximum size of performance log files is as follows:

86,400 x 14 = 1,209,600 kilobytes