Hitachi

JP1 Version 12 JP1/Automatic Job Management System 3 Administration Guide


9.1 Estimating a maintenance time

If you are using a JP1/AJS3 database, you periodically need to make unavailable areas usable again or reorganize the database by using the automatic maintenance function or the ajsembdbreclaim command. If the automatic maintenance function is enabled, the system performs maintenance of the embedded database every day at the specified time. If you use the ajsembdbreclaim command, you can execute the command at any time or register the command as a job to perform maintenance periodically.

To estimate when to execute the ajsembdbreclaim command and when to perform reorganization, analyze the database area. Estimate when to perform reorganization based on the values measured in the procedure below.

When estimating the reorganization time, consider weekly and monthly peak days and weekly and monthly increases.

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