Central processing unit (CPU) and save-while-active

The relationship between the server's CPU and a save-while-active operation depends on the available CPU capacity and the characteristics of other jobs on the server

Parent topic: Performance considerations for save-while-active

Available CPU capacity

The amount of CPU capacity that is available for the save process can have a large influence on the time required for the save operation to complete. Therefore, be prepared for the save-while-active operation to take longer than a save operation on a restricted server. The change in the time required for the save operation to complete may be as little as 10 percent longer to four to five times longer or more. This depends on the server resources that are available for the save. As a guideline, allow only about 30% of the CPU for workloads that are running in the background.

Characteristics of other jobs on the server

The active jobs during a save-while-active operation can affect both the response time and the duration of the save operation. Try to use the save-while-active function when CPU utilization is low and the amount of update activity on the server is low.