IT47283: SLOW GUI RESPONSE AND BACKUP PROGRESS DUE TO OVER 100% CPU UTILIZATION FOR MONGOD PROCESS

APAR status

• Closed as program error.

Error description

• After upgrading the IBM Storage Protect Plus (SPP) server to
  version 10.1.16.3, the CPU utilization ratio rises to more than
  100% for the 'mongod' service. The high consumption of the CPU
  is causing slow response when accessing the SPP graphical
  interface and can affect the communication to the VADP proxy.
  On vSphere graphical view at the 'Performance Overview' page
  high peaks on the CPU consumption can be seen for the SPP host.
  
  When you run the 'top' command on the command line interface of
  the SPP server, you may see the following eg:
  <timestamp> INFO .. Expiring retention snapshot <SnapshotName>
  PID   USER   PR  VIRT    RES  S  %CPU  %MEM  TIME+  COMMAND
  123 mongod   20 21.6g  20.3g  S 291.2  15.2  347:46 /usr/bin/
   mongod --quiet -f /etc/mongod2.conf --wiredTigerCacheSizeGB
   =22.57 run
  
  |MDVREGR 10.1.16.2 5737SPLUS|
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Storage Protect Plus level 10.1.15.3 or later.           *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * see Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply the fixing level when available. This problem is fixed *
  * in IBM Storage Protect Plus level 10.1.16.4. Note: This is   *
  * subject to change at the discretion of IBM.                  *
  ****************************************************************
  

Problem conclusion

• IBM Storage Protect Plus was exhibiting the CPU spike issue
  because of multiple "Association_PathToId" calls as seen
  reported by the MongoDB instance when the user is logged-in
  using non-admin LDAP user.
  In IBM Storage Protect Plus 10.1.16.4 and later, this issue is
  fixed by providing all the non-admin users privilege to 'Read'
  the VMware resources for Backup and Restore workflows, without
  actually compromising the 'Write' privilege.
  This limitation is now documented in the Product limitation
  document.
  

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

  SP PLUS

• Fixed component ID

  5737SPLUS

Applicable component levels