IZ76059: ONE-EVENT-PER-ROW OF DATA CAUSES SITMON BUSY ON AIX.

IBM Tivoli Monitoring 6.2.2 Fix Pack 8 (6.2.2-TIV-ITM-FP0008)
IBM Tivoli Monitoring 6.2.2 Fix Pack 9 (6.2.2-TIV-ITM-FP0009)
IBM Tivoli Monitoring 6.2.2 Fix Pack 6 (6.2.2-TIV-ITM-FP0006)

APAR status

• Closed as program error.

Error description

• The KPX_PUREEVT_ONE_ROW=Y parameter enables to send one pure
  event per one row.  When a lot of events was sent to TEMS with
  the parameter, Sitmon busy occurred and TEMS hung.
  
  Environment:
  ITM 6.2.1 FP01 - AIX 6.1
  
  Detailed Recreation Procedure:
  Send a lot of pure events to TEMS with KPX_PUREEVT_ONE_ROW=Y
  parameter.
  For example, 20 events per second.
  
  Related Files and Output:
  /ecurep/pmr/5/9/59651,695,760/2010-04-12/
  59651,695,760_20100412a.zip.
  
  Approver:DK
  
  Reported Release:621
  

Local fix

Problem summary

• Changes for a feature to emit one event per row for pure events
  with the variable KPX_PUREEVT_ONE_ROW=Y may trigger recursive
  lock handling problems. This is triggered if one thread attempts
  to unlock a recursive lock held by another thread.
  

Problem conclusion

• This was fixed by ensuring that every sample in an event data
  flow now requires properly locking and unlocking sample data
  storage. This avoids a recursive lock thread affinity
  requirement, associates outstanding sample row data to
  corresponding SQL unit of work, and decouples sample processing
  from RPC updating sample data storage.
  
  The fix for this APAR is included in the following maintenance
  vehicle:
      | fix pack | 6.2.1-TIV-ITM-FP0003
  

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:

  OA33575

Fix information

• Fixed component name

  TEMA

• Fixed component ID

  5724C04TE

Applicable component levels

• R621 PSY

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