Learn how to effectively reduce JES2 spool utilization when it exceeds the set limit. Discover the best approach to manage spool space and optimize your mainframe performance.
Table of Contents
Question
To reduce the spool percentage when it exceeds its limit,
A. can purge some jobs from output queue
B. can rerun rollback jobs
C. can schedule some jobs
D. none
Answer
A. can purge some jobs from output queue
Explanation
When the JES2 spool utilization exceeds its predefined limit, the most effective action to take is to purge some jobs from the output queue (option A).
The JES2 spool is a dedicated area of DASD that stores job input and output data. Each job processed by JES2 utilizes a portion of this spool space. When the spool utilization reaches its limit, it can lead to performance issues and even prevent new jobs from being processed.
To address this situation, purging selected jobs from the output queue is the recommended approach. By removing unnecessary or completed jobs that are still occupying spool space, you can quickly free up resources and bring the spool utilization back below the limit.
Rerunning rollback jobs (option B) or scheduling some jobs (option C) will not directly address the immediate issue of excessive spool utilization. These actions may be part of a longer-term solution but do not provide the prompt relief needed in this scenario.
Therefore, purging jobs from the output queue (option A) is the most appropriate action to reduce the spool percentage when it exceeds its limit, allowing the system to continue processing jobs efficiently.
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