IV19092: UNIX OS AGENT CAN GENERATE HIGH CPU USAGE WHEN ARE ACTIVE MANY SITUATIONS AGAINST PROCESSES

IBM Tivoli Monitoring 6.2.2 Fix Pack 9 (6.2.2-TIV-ITM-FP0009)
IBM(R) Tivoli(R) Monitoring: UNIX(R) OS Agent 6.2.2.5-TIV-ITM_UNIX-IF0007

APAR status

• Closed as program error.

Error description

• When are active many (about 100) situations monitoring the
  processes attribute group, the agent can generate high CPU
  usage. The introduction of a configurable delay after the
  request to the OS helps to avoid the peaks of the CPU.
  
  Environment:
   Monitoring Agent for Unix OS 6.22fp4 InterimFix 6 on HP
  
  Approver: FS
  

Local fix

Problem summary

• The UNIX OS Agent may cause high CPU usage when many situations
  are active simultaneously against processes.
  
  When there are many active situations (typically greater than
  100) monitoring simultaneously the Process attribute group, the
  UNIX OS Agent may generate high CPU usage. The introduction of a
  configurable delay after the request to the OS helps to avoid
  the peaks of the CPU even if this lengthens the time of the data
  collection.
  
  For this APAR fix to be effective, a new environment variable
  has been added. See the Install Actions section of the APAR
  conclusion for more details.
  

Problem conclusion

• The behavior of the UNIX OS Agent was modified to allow the CPU
  to sleep an amount of time, configurable with the new
  environment variable KUX_PROCESSES_DELAY.
  
  Install Actions:
  
  Set KUX_PROCESSES_DELAY to a value in milliseconds for the CPU
  to sleep in the ux.ini file, and restart the agent. The range of
  this variable is 0 to 999 milliseconds, where 0 means the normal
  behavior of the agent without sleep.
  
  
  The fix for this APAR is included in the following maintenance
  vehicle:
  
     | interim fix |  6.2.2.4-TIV-ITM_UNIX-IF0010 |
     | fix pack | 6.2.2-TIV-ITM-FP0009 |
     | fix pack | 6.2.3-TIV=ITM-FP0002 |
  
  Note: Search the IBM technical support web site for maintenance
  package availability.
  

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 UNIX

• Fixed component ID

  5724C040U

Applicable component levels

• R622 PSY

     UP