IJ01062: LARGE VOLUME OF KT1 REQUESTS DURING AN ITM-BASED TADDM DISCOVERY CAUSES HIGH CPU AT THE HUB TEMS

6.3.0.7-TIV-ITM_TEMA-IF0007

IBM Tivoli Monitoring 6.3.0 Fix Pack 7 Service Pack 1 (6.3.0.7-TIV-ITM-SP0001)

APAR status

• Closed as program error.

Error description

• Problem:
  When performing an ITM based TADDM discovery using the KT1
  component, a large volume (10K+) of
  getfile/executeCommand/putFile requests are made against the
  node list table on the hub TEMS, resulting in high CPU and a
  performance degradation
  
  Root Cause :
  Validation of each request involves an entire scan of the Node
  List table; the overhead of doing so becomes significant when
  the rate of requests is high and the Node List table is even of
  a moderate size.
  
  Solution :
  Optimise the KT1 code to avoid scanning the entire Node List
  table during request validation.
  

Local fix

• N/A
  

Problem summary

• When performing an ITM based TADDM discovery, (which relies on
  the KT1 component), a large volume (10K+) of
  getfile/executeCommand/putFile requests are made which results
  in many SOAP requests to query the
  node list table on the hub TEMS.  This results in high CPU and
  performance degradation at the Hub and also impacts tacmd users
  as that utility also relies on SOAP.
  
  
  Validation of each request involves an entire scan of the Node
  List table; the overhead of doing so becomes significant when
  the rate of requests is high and the Node List table is of even
  a moderate size.
  

Problem conclusion

• Optimise the KT1 code to avoid scanning the entire Node List
  table during request validation.
  
  
  The fix for this APAR is contained in the following maintenance
  packages:
  
     | service pack | 6.3.0.7-TIV-ITM-SP0001
  

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:

  OA56394

Fix information

• Fixed component name

  TEMA

• Fixed component ID

  5724C04TE

Applicable component levels