IT08768: DSMQSAN PROCESS PERFORMANCE ISSUE IN AIX LARGE PAGE ENVIRONMENT SUPPORT

6.3.6.000-TIV-TSMRPT-AGENT-Linux
6.3.6.000-TIV-TSMRPT-AGENT-AIX
6.3.6.000-TIV-TSMRPT-AIX
6.3.6.000-TIV-TSMRPT-AGENT-Windows
6.3.6.000-TIV-TSMRPT-Linuxx86
6.3.6.000-TIV-TSMRPT-Linuxx86_64
6.3.6.000-TIV-TSMRPT-WindowsI32
6.3.6.000-TIV-TSMRPT-WindowsX64
6.3.6.000-TIV-TSMAC-WindowsX64
6.3.6.000-TIV-TSMAC-WindowsI32
6.3.6.000-TIV-TSMAC-SolarisSPARC
6.3.6.000-TIV-TSMAC-Linuxx86
6.3.6.000-TIV-TSMAC-Linuxs390x
6.3.6.000-TIV-TSMAC-AIX
6.3.6.000-TIV-TSMALL-SolarisSPARC
6.3.6.000-TIV-TSMALL-WindowsX64
6.3.6.000-TIV-TSMSTA-WindowsI32
6.3.6.000-TIV-TSMALL-HP-UX
6.3.6.000-TIV-TSMALL-Linuxppc64
6.3.6.000-TIV-TSMALL-AIX
6.3.6.000-TIV-TSMALL-Linuxs390x
6.3.6.000-TIV-TSMALL-Linuxx86_64
7.1.3.000-TIV-TSMSRV-WIN
7.1.3.000-TIV-TSMSRV-SolarisSPARC
7.1.3.000-TIV-TSMSRV-Linuxx86_64
7.1.3.000-TIV-TSMSRV-Linuxs390x
7.1.3.000-TIV-TSMSRV-Linuxppc64
7.1.3.000-TIV-TSMSRV-HP-UX
7.1.3.000-TIV-TSMSRV-AIX
IBM Tivoli Storage Manager V6.3 Fix Pack 6 (6.3.6.000) Server Downloads

APAR status

• Closed as program error.

Error description

• Tivoli Storage Manager Server on AIX platform can suffer
  performance problems when executing a SAN discovery operation.
  The dsmqsan process will always run with high CPU utilization.
  
  The problem is present only when the AIX system has been set up
  for the Large Page Environment.
  
  It is also possible (but not necessary) to have the following
  messages present in the activity log:
  
  ANR1926W A SCSI inquiry has timed out after 90 seconds.
  ANR1786W HBAAPI not able to get adapter name.
  
  
  
  Customer/L2 Diagnostics:
  
  A Tivoli Storage Manager Server trace (flags suggested: NA
  NAHBAAPI NAQSANPIPE SPI SPID ADDMSG) will   indicate the SAN
  discovery runs repeatedly in a loop:
  
  17:37:26.244
  [31][nadiscvr.c][2318][NaDiscoverThread]:checkConfig signal
  received. Starting to discover SAN devices
  ...
  17:37:49.649
  [31][nadiscvr.c][2318][NaDiscoverThread]:checkConfig signal
  received. Starting to discover SAN devices
  ...
  17:38:12.721
  [31][nadiscvr.c][2318][NaDiscoverThread]:checkConfig signal
  received. Starting to discover SAN devices
  ...
  17:38:34.362
  [31][nadiscvr.c][2318][NaDiscoverThread]:checkConfig signal
  received. Starting to discover SAN devices
  ...
  17:38:55.776
  [31][nadiscvr.c][2318][NaDiscoverThread]:checkConfig signal
  received. Starting to discover SAN devices
  ...
  17:39:19.205
  [31][nadiscvr.c][2318][NaDiscoverThread]:checkConfig signal
  received. Starting to discover SAN devices
  
  
  Tivoli Storage Manager Versions Affected: All Tivoli Storage
  Manager Server on AIX platforms
  
  Initial Impact: Low
  
  Additional Keywords: Large Page Environment AIX LPE SAN
  Discovery ANR1926W ANR1786W dsmqsan
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All Tivoli Storage Manager server users of SANdiscovery.     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing levels when available.                          *
  * This problem is currently projected to be fixed in levels    *
  * 6.3.6 and 7.1.3.                                             *
  * Note that this is subject to change at the discretion of     *
  * IBM.                                                         *
  ****************************************************************
  

Problem conclusion

• This problem was fixed.
  Affected platforms:  AIX, Linux, Solaris.
  

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

  TSM SERVER

• Fixed component ID

  5698ISMSV

Applicable component levels

• R63A PSY

     UP

• R71A PSY

     UP