CAS9 is holding on to excessive amount of CSA

Products

• COMMON SERVICES FOR Z/OS

Issue/Introduction

An IPL was executed to activate Common Services Maintenance. CAS9 is holding additional CSA (then from the previous IPL) as flagged by IBM health check VSM_CSA_THRESHOLD

Environment

Release : 15.0
Component : Resource Initialization Manager(Comm)

Cause

COMMON SERVICES MAINTENANCE

The increase in CSA usage can be attributed to fix LU05527,  which provides performance improvements to CCS SMF processing.   This storage usage is completely normal.

We have come to realize a calculation error that has resulted in more CSA usage that originally thought. Rather than ~140K increase, customers have reported
seeing an increase of ~240K.  A new PTF will be released to correct this problem and reduce CSA increase to the expected value.

Resolution

PTF LU08112 is available to resolve this problem.