IT00183: BACKUP CAUSED A PERFORMANCE DEGRADATION DURING A STRESS TEST

IBM PureApplication System Version 1.1.0.2

APAR status

• Closed as program error.

Error description

• User initiated a stress test in which 27 virtual system
  deployments were initiated at once. After about 4 hours 26 has
  completed and the 27th had timed out.
  
  Investigation found that the nightly backup job was kicked off
  around the time of the last deployment. The performance
  degradation was due to the job queue getting temporarily hung
  and the virtual system deployment timed out.
  

Local fix

Problem summary

• The backup nightly task should wait until priority jobs have
  comepleted before starting. A task queue priority check and a
  task delay until priority jobs complete should be implemented.
  

Problem conclusion

• Code has been implemented to wait for priority tasks to complete
  for lower priority tasks.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  PUREAPP SYS W15

• Fixed component ID

  5725G3200

Applicable component levels

• R110 PSY

     UP

• R100 PSN

     UP

• RESP PSN

     UP