Value SKPT requests in ACCUM mode lost over 4 billion records within Sysview for Db2

Products

• SYSVIEW Performance Management Option for DB2 for z/OS

Issue/Introduction

Changes made to EDM_SKELETON_POOL have effects on the Sysview Performance Management Option for Db2 for z/OS (IDB2) 
SKPT requests and loads using ACCUM mode daily. It appears that the requests are loosing values with time.

Example:
On this instance day before requests was 4221779K and loads 148443 the next day requests was 174361K and loads 153982.
The requests field lost over 4 billion.

Resolution

The values in question come from the Db2 QISE block in the statistics trace record. The SKPT requests and loads are from fields
QISEKTG and QISEKTL, both of which are defined as fullword (DS F) fields. The maximum value for a fullword is a little over 4 billion,
so it will eventually roll over. The best option here is to request that IBM make these fields doublewords. If IBM is not going to do it,
then there is the option for IDB2 is to create a separate, larger field for these values and track rollovers of the IBM field.
This option is a more complicated option and would need to be scheduled as a product enhancement.