One of our Deliver databases has a RMOPARM setting of JOBCLSL=*.
There was a spike in common storage which resulted in an IPL due to how badly fragmented common storage was left.
A dump found that there were over 83,000 PQE control blocks obtained in common storage, which is what filled common storage, and these blocks are obtained by Deliver.
During this time, there were tens of thousands of UNIX related started task address spaces started.
The RMOPARM JOBCLSL=* is set, so that Deliver is processing started tasks and TSO users.
We then updated JOBCLSL=* to JOBCLSL=ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 (minus @ and #).
Why is "JOBCLSL=*" causing such a large spike in common storage? Is this expected?
Release : 14.0