IT41480: MONGODB CPU UTILIZATION SPIKES TO 100% ON THE IBM SPECTRUM PROTECT PLUS SERVER

APAR status

• Closed as program error.

Error description

• MongoDB can spike to 100% CPU utilization when a query spans a
  very large data set, such as the job log entries.
  These spikes in CPU utilization can be seen during busy job
  operations and when the server is in an idle state.
  When the MongoDB service is consuming 100% CPU utilization, the
  IBM Spectrum Protect Plus Portal may become unavailable.
  User's will not be able to log into the portal until CPU
  utilization drops.
  
  Affected levels: IBM Spectrum Protect Plus 10.1.10 and later
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Spectrum Protect Plus level 10.1.10, and 10.11           *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply the fixing level when available. This problem is       *
  * currently projected to be fixed in IBM Spectrum Protect Plus *
  * 10.1.12 level. Note that this is subject to change at the    *
  * discretion of IBM.                                           *
  ****************************************************************
  

Problem conclusion

• A hint is now provided that guides MongoDB to use the efficient
  index. By using the efficient index, MongoDB no longer
  inefficiently scans and sorts the large amount of data in the
  job log MongoDB collection, which dramatically reduces the
  required CPU cycles to complete the query. This ensures that
  MongoDB does not use 100% of available CPU resources when
  querying the job log collection.
  

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:

Modules/Macros

• Platform
  

Fix information

• Fixed component name

  SP PLUS

• Fixed component ID

  5737SPLUS

Applicable component levels