Troubleshooting
Problem
The "above bar" (64-bit) storage usage reported by the IBM MQ queue manager suddenly increased.
Symptom
The "above bar" values increased in message:
CSQY220I Queue manager storage usage: local storage: used mmMB, free nnMB: above bar: used aabb, free cc
The System Action in the description of CSQY225E says:
"Processing continues. Storage contraction processing was performed, but the remaining deallocated virtual storage is less than a predetermined safe amount. If storage use continues to increase, the queue manager might terminate abnormally in an unpredictable way."
CSQY220I Queue manager storage usage: local storage: used mmMB, free nnMB: above bar: used aabb, free cc
The values can increase to be larger than the MEMLIMIT value specified in the JCL for the queue manager.
The following messages might also appear:
CSQY224I CSQSCTL Queue Manager is short of local storage above the bar.
CSQY225E CSQSCTL Queue Manager is critically short of local storage above the bar - take action
The System Action in the description of CSQY225E says:
"Processing continues. Storage contraction processing was performed, but the remaining deallocated virtual storage is less than a predetermined safe amount. If storage use continues to increase, the queue manager might terminate abnormally in an unpredictable way."
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Document Information
Modified date:
28 April 2025
UID
swg22017139