The client stopped their CA Deliver RMOSTC task using "P RMOSTC", rather than the recommended "F RMOSTC,OFF".
As a result, their ECSA consumption alertingly increased.
CA Deliver - All Releases
The client had stopped their CA Deliver RMOSTC task using "P RMOSTC".
Stopping it in that way does not remove the "hooks" Deliver places in the system for its pre-spool processing.
As a result, requests still queue up for the Deliver task.
Note: The recommended method to bring down the RMOSTC task is with "F RMOSTC,OFF".
After stopping with "P RMOSTC", starting soon thereafter with "S RMOSTC,PARM=OFF" will free PQE requests allocated beyond the fixed 512 PQE requests pre-allocated by the Deliver task.
The 512 PQEs are allocated from ECSA and occupy 70K worth of storage.
This 70K of ECSA is not freed with PARM=OFF.
The number of requests queued to the Deliver task can be determined with the SSXTINFO REXX program.
The program SSXTINFO is in View library CVDECLS0(SSXTINFO).
The client used "S RMOSTC,PARM=OFF", and ECSA consumption dropped from 93% to 80%.