Pool Utilization situations
You can take corrective action when applications stall or terminate.
- IMS_Largest_Freeblock_Critical
- The pool identified in this exception has exceeded the threshold
for largest free storage area. When the largest area available becomes
too small to handle the request, applications can stall or terminate.
You can address this issue by reducing the amount of work being requested
or increasing the amount of storage available in the pool.
The formula is:
Pool_Utilization.Largest_Free_Block LE 4096 - IMS_Largest_Freeblock_Warning
- The pool identified in this exception has exceeded the threshold
for largest free storage area. When the largest area available becomes
too small to handle the request, applications can stall or terminate.
You can address this issue by reducing the amount of work being requested
or increasing the amount of storage available in the pool.
The formula is:
Pool_Utilization.Largest_Free_Block LE 4916 AND Pool_Utilization.Largest_Free_Block GT 4096 - IMS_PoolFreeBlocks
- The pool identified in this exception has exceeded the threshold
for number of pool fragments. This can lead to excessive amounts of
paging or to applications stalling because they cannot get a large
enough pool area to handle the request. You can attempt to reduce
the fragmentation by terminating tasks that might not be critical
to your environment.
The formula is:
Pool_Utilization.Free_Blocks GT 1 - IMS_Pool_Util_High_Warning
- The pool identified in this exception has exceeded the threshold
for utilization. When pool space is exhausted, applications will stall
while waiting for the pool space to become available again. You can
address this issue by reducing the amount of work being requested
or increasing the amount of storage available in the pool.
The formula is:
Pool_Utilization.Utilization_Percentage GE 48.00 AND Pool_Utilization.Utilization_Percentage LT 60.00 - IMS_Pool_Util_High_Critical
- The pool identified in this exception has exceeded the threshold
for utilization. When pool space is exhausted, applications will stall
while waiting for the pool space to become available again. You can
address this issue by reducing the amount of work being requested
or increasing the amount of storage available in the pool.
The formula is:
Pool_Utilization.Utilization_Percentage GE 60.00