IV84786: SLOW RESPONSE TIME FOR LINUX DISK QUERIES

IBM Tivoli Monitoring: Linux(R) OS Agent 6.3.0.6-TIV-ITM_LINUX-IF0004
IBM Tivoli Monitoring 6.3.0 Fix Pack 7 (6.3.0-TIV-ITM-FP0007)
IBM Tivoli Monitoring: Linux(R) OS Agent 6.3.0.6-TIV-ITM_LINUX-IF0005

APAR status

• Closed as program error.

Error description

• The Linux OS Agent by default monitors all filesystem types.
  There are options only to exclude NFS and CIFS types. It does
  not provide any options to filter out other specific types. In
  servers configurations where there is a huge number of
  filesystems the Disk data collection may become extremely slow,
  and it would be useful to filter out the filesystem types that
  are not needed.
  
  Affected Platforms / Versions:
  This issue affects all the Linux OS agent versions and it does
  not depend on the Linux OS version.
  
  Initial Impact:
  Medium, unneeded monitoring of filesystems can introduce
  performance issues on the server where the agent runs.
  
  Additional Keywords:
  FileStats
  KLZDISK
  Linux Disk
  File System Type
  FSTYPE
  

Local fix

• N/A
  

Problem summary

• Problem Description: Performance impacts due to missing option
   for excluding unneeded filesystem types on Linux
  Problem/Problem Summary: The Monitoring Agent for Linux OS only
   provides the possibility to choose whether or not NFS and CIFS
   filesystems must be monitored. Any other types cannot be
   excluded. In case of a large number of filesystems of the same
   type that don't need to be monitored, this limitation can
   introduce performance issues on the agent. In order for this
   APAR to be properly implemented in your environment, a new
   environment variable has been added. See the "Install Actions"
   section of the APAR conclusion for more details.
  

Problem conclusion

• Problem conclusion: Introduced new environment variable that
   allows to exclude a list of filesystem types.
  Install Actions:
   set KLZ_EXCLUDE_FSTYPE=<comma separated list of types> in the
   lz.ini configuration file. Example:
    KLZ_EXCLUDE_FSTYPE=mvfs,ext3. The
   The names must match exactly those shown by command "mount -l".
   In case of conflict with KBB_SHOW_NFS or KBB_SHOW_CIFS
   settings, KLZ_EXCLUDE_FSTYPE takes priority.
  
  
  The fix for this APAR will be contained in the following
  maintenance packages:
  
  | FixPack    | 6.3.0-TIV-ITM-FP0007
  | InterimFix | 6.3.0.6-TIV-ITM_LINUX-IF0004
  

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

  ITM AGENT LINUX

• Fixed component ID

  5724C04LN

Applicable component levels