6.1.2 Considering maintenance methods

To maintain an embedded database, you need to enable the automatic maintenance function or execute the ajsembdbreclaim command manually or automatically.

Organization of this subsection

(1) Selecting the maintenance method
(2) Precautions on using the automatic maintenance function
(3) JP1/AJS3 - Manager configuration that does not need maintenance

(1) Selecting the maintenance method

The following table shows the characteristics of the automatic maintenance function and the ajsembdbreclaim command. Use the appropriate method for your operation.

Table 6‒2: Database maintenance methods
Maintenance method	Advantages	Disadvantages
The automatic maintenance function	Maintenance is automatically performed every day at the user-specified time. After the function is set, the user does not need to perform subsequent operations.	Maintenance must be performed on a daily basis. Maintenance performed with a different frequency (for example, once every two weeks or once a month) is not possible. Maintenance cannot be performed individually for a scheduler database or an agent management database.
Execute the `ajsembdbreclaim` command	The user can specify desired maintenance intervals. Maintenance can be performed in accordance with the operation, such as performing maintenance based on the calendar or after a specific job. Maintenance can be performed for each scheduler service or agent management database.	The user must manually perform maintenance or create a job that executes the command.

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(2) Precautions on using the automatic maintenance function

If maintenance by using the automatic maintenance function and maintenance by using the ajsembdbreclaim command are performed concurrently, either maintenance processing might terminate abnormally. If you enable the automatic maintenance function, do not execute the ajsembdbreclaim command while maintenance is being performed.

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(3) JP1/AJS3 - Manager configuration that does not need maintenance

When JP1/AJS3 - Manager is configured as follows, maintenance is not required because an embedded database is not used.

When the functionality of JP1/AJS3 - Manager is restricted to job execution

For details about restricting the functionality of JP1/AJS3 - Manager to job execution, see 13.1.6 Limiting JP1/AJS3 - Manager resources to those used for job operation in the JP1/Automatic Job Management System 3 Administration Guide.
When the functionality of JP1/AJS3 - Manager is restricted to the registration and operation of submit jobs

For details about restricting the functionality of JP1/AJS3 - Manager to the registration and operation of submit jobs, see 7.1.2(4) Restricting JP1/AJS3 - Manager to the registration and operation of submit jobs (Windows host).
When JP1/AJS3 - Manager is used in an external database environment

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