IT38428: PERFORMANCE COLLECTION INTERVALS SWITCHES FROM 5 MINUTES TO 10 MINUTES AT TIMES

APAR status

• Closed as program error.

Error description

• Observation of performance metrics for an SVC storage device
  show a noticeable change in the performance graph where it
  spikes up and down in an exagerated sawtooth pattern for a
  period of time and then goes back to the expected metric
  tracking.  During these bursts of sawtooth activity, it is found
  that the collection interval for the storage device alternates
  between 5 minutes (expected) and 10 minutes (unexpected).
  
  
  The storage devices that are configured as the backend of the
  SVC are also monitored but are not providing the expected
  performance metrics at times and this is unexpectedly affecting
  the SVC and its metrics.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Storage Insights users monitoring SVC storage devices    *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * In Storage Insights the observation of performance           *
  * metrics for an SVC storage device show a noticeable          *
  * change in the performance graph where it spikes up           *
  * and down in an exaggerated sawtooth pattern for a            *
  * period of time and then goes back to the expected            *
  * metric tracking.  During these bursts of sawtooth            *
  * activity, it is found that the collection interval for the   *
  * storage device alternates between 5 minutes                  *
  * (expected) and 10 minutes (unexpected).                      *
  *                                                              *
  * The storage devices that are configured as the               *
  * backend of the SVC are also monitored but are not            *
  * providing the expected performance metrics at times          *
  * and this is unexpectedly affecting the SVC and its           *
  * metrics.                                                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• The fix for this APAR is targeted for the following release:
  
  IBM Storage Insights 4Q21   [ 54X-IBM-SI ]
  ( release target 4Q 2021 / October )
  
  The target dates for future releases do not represent a formal
  commitment by IBM. The dates are subject to change without
  notice.
  

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

  STORAGE INSIGHT

• Fixed component ID

  5608TPCSI

Applicable component levels