Performance Issue on ADSMI002
Article ID: 134692
Updated On:
Products
Issue/Introduction
Upgrading hardware environment from zEC12 to z14.
One of required task is evaluate the performance issues on the new hardware. We did the collection to run a zCP3000 study.
Our study identified a SIIS (Store Into Instruction Stream) issue mainly related to two of our jobs.
Both jobs have in common the same program ADSMI002, that we believe is the source of the impact.
How to mitigate this issue before our migration?
Environment
Release : Disk Backup and Restore 12.5
Resolution
Use SYSVIEW Performance Management
Use the TASKMON Navigation Line Command against an executing STC, SYStem task or Batch Job.
Use the Activity command to display the executing task.
Use the TM Line command against the Jobname.
The Count and Percent columns will show you where the task is spending its time.
The offset column will show you the offset into the module where the STC/JOB is spending its time.
The value in the Offset column will match up to the LIST option of the COBOL compile to find the source code line number.
The TASKMON command monitors the activity of work units within an address space over an interval.
This can be used to identify the modules that are being executed and the amount of time spent at different offsets within the modules.
Feedback
