IT45611: STORAGE INSIGHTS PERFORMANCE MONITORING DATA POINTS CONSISTENTLY MISSING, APPROXIMATELY EVERY 40 MINUTES.

APAR status

• Closed as program error.

Error description

• The customer is using Storage Insights to monitor a SpecV device
  with a 5-minute Performance Monitoring (PM) interval. In
  approximately every 40 minutes, there is an occurrence where
  Storage Insights "misses" a Performance Monitor data point for
  that particular device. This results in temporary values of
  "Device is not providing valid performance data" for Data
  Collection and Performance Monitoring Status in the Block
  Storage Systems table. However, this issue is momentary as the
  next Storage Insights performance monitoring collection from the
  device is successful.
  
  This problem has the potential to impact all SpecV devices
  being monitored by a data collector. However, devices monitored
  by Call Home with Cloud services remain unaffected.
  
  To verify the problem, navigate to the Resource tab, right-click
  on the selected device, and choose "View performance." Compare
  the Performance Monitoring (PM) interval by choosing 'Toggle
  chart/table' located in the upper right corner.
  
  During the reproduction of the issue, observed the missing
  samples in a scenario where the storage device had a 2-minute
  interval, and Storage Insights was configured with a 5-minute
  interval.
  

Local fix

• To address the issue, modify the performance stats interval on
  the device to either 5 minutes or 1 minute using the startstats
  command. The preferred and default interval for Storage Insights
  is 5 minutes. Utilize the following command to set the interval
  on the device.
  
  startstats -interval 5
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Storage Insights users monitoring IBM Storage Virtualize *
  * devices                                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * The customer is using Storage Insights to monitor a SpecV    *
  * device                                                       *
  * with a 5-minute Performance Monitoring (PM) interval. In     *
  * approximately every 40 minutes, there is an occurrence where *
  * Storage Insights "misses" a Performance Monitor data point   *
  * for                                                          *
  * that particular device. This results in temporary values of  *
  * "Device is not providing valid performance data" for Data    *
  * Collection and Performance Monitoring Status in the Block    *
  * Storage Systems table. However, this issue is momentary as   *
  * the                                                          *
  * next Storage Insights performance monitoring collection from *
  * the                                                          *
  * device is successful.                                        *
  *                                                              *
  * This problem has the potential to impact all SpecV devices   *
  * being monitored by a data collector. However, devices        *
  * monitored                                                    *
  * by Call Home with Cloud services remain unaffected.          *
  *                                                              *
  * To verify the problem, navigate to the Resource tab,         *
  * right-click                                                  *
  * on the selected device, and choose "View performance."       *
  * Compare                                                      *
  * the Performance Monitoring (PM) interval by choosing 'Toggle *
  * chart/table' located in the upper right corner.              *
  *                                                              *
  * During the reproduction of the issue, observed the missing   *
  * samples in a scenario where the storage device had a         *
  * 2-minute                                                     *
  * interval, and Storage Insights was configured with a         *
  * 5-minute                                                     *
  * interval.                                                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• The fix for this APAR is targeted for the following release:
  
  IBM Storage Insights 2Q24   [ 54X-IBM-SI ]
  ( release target 2Q 2024 / April )
  
  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