IV47790: IMPROVE PERFORMANCE OF MISSING SITUATIONS AGAINST PROCESS TABLE

IBM Tivoli Monitoring 6.3.0 Fix Pack 2 (6.3.0-TIV-ITM-FP0002)

APAR status

• Closed as new function.

Error description

• Improve performance of MISSING situations for the Linux and UNIX
  OS agents to reduce CPU utilization on the magaged system and
  allow customers to deploy more situations that are simpler.
  

Local fix

Problem summary

• Improve performance of MISSING situations against the PROCESS
  table.
  
  
  A common situation deployed to UNIX or Linux OS agents is to
  detect whether a process is no longer running.  This has been
  achieved through the MISSING operation on IBM Tivoli Monitoring
  Situations, however the MISSING operation was an expensive
  situation to run against a typical operating system.
  
  This enhancement improves the performance of the MISSING
  operation when run against the UNIX or Linux OS agent PROCESS
  table.
  
  Additional Details:
  Prior to ITM 6.3 FP2:
  - Each situation request populates the Process table
    causing the OS Agent to consume CPU
  - For each process, the OS Agent collects all the
    information (CPU consumption, user, group, etc.) even
    if they are not relevant for the specific situation
  (i.e MISSING situations on processes commands and
  arguments do not require to collect all process attributes)
  
  Code changes implemented with APAR IV47790 / IV51003
  provide an 'alternative path' for situation evaluation
  using the MISSING function by using cached information.
  
  The caching mechanism is controlled by setting a new
  parameter in the <pc>.ini file for the OS monitoring
  agent:
  KUX_PROCESS_CMD_SAMPLE_SECS (ux.ini)
  KLZ_PROCESS_CMD_SAMPLE_SECS (lz.ini)
  
  This feature is enabled by default and has a default
  value of 120 seconds for refreshing the internal cache.
  
  The minimum allowed value for this cache refresh
  interval is 30 seconds, settings between 1 and 30
  will refresh the cache at 30 seconds intervals.
  
  To disable caching, set the new parmater value to 0:
  KUX_PROCESS_CMD_SAMPLE_SECS=0 (ux.ini)
  KLZ_PROCESS_CMD_SAMPLE_SECS=0 (lz.ini)
  
  For debugging this are of code, enable RAS1 logging:
  
  Linux:
  KBB_RAS1=ERROR (UNIT:klz ALL) (UNIT:proc ALL) (UNIT:kra ALL)
  
  UNIX:
  KBB_RAS1=ERROR (UNIT:kux ALL) (UNIT:proc ALL) (UNIT:get_p ALL)
     (UNIT:kra ALL)
  
  Although the caching mechanism has been added for UNIX and Linux
  OS agents, the mechanism to implement the behavior is different
  between platforms.
  
  Additional Keywords:
  IV51033
  IV48002
  IV51064
  
  Linux OS - LZ
  KLZPROC
  KLZ_Process
  
  UNIX OS - UX
  UNIXPS
  Process
  

Problem conclusion

• The improvements allow customers to now define unique situations
  for each process they wish to monitor.
  
  
  The fix for this APAR is contained in the following maintenance
  packages:
  
     | fix pack | 6.3.0-TIV-ITM-FP0002
  

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:

  IV51033

Fix information

• Fixed component name

  ITM AGENT UNIX

• Fixed component ID

  5724C040U

Applicable component levels

• R630 PSY

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