IZ49340: The arithmetic subagent uses too much CPU allocation and freeing memory in the OID object.

IBM Tivoli 4.0.0-TIV-SSM-FP0010
IBM Tivoli 4.0.0-TIV-SSM-FP0011
IBM Netcool System Service Monitor SSM 4.0 Fix Pack 12 README 4.0.0-TIV-SSM-FP0012
IBM Netcool System Service Monitor SSM 4.0 Fix Pack 13 README 4.0.0-TIV-SSM-FP0013
IBM Netcool System Service Monitor SSM 4.0 Fix Pack 14 README 4.0.0-TIV-SSM-FP0014
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 1 README 4.0.0.14-TIV-SSM-IF0001
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 2 README 4.0.0.14-TIV-SSM-IF0002
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 3 README 4.0.0.14-TIV-SSM-IF0003
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 4 README 4.0.0.14-TIV-SSM-IF0004
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 5 README 4.0.0.14-TIV-SSM-IF0005
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 6 README 4.0.0.14-TIV-SSM-IF0006
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 7 README 4.0.0.14-TIV-SSM-IF0007
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 8 README 4.0.0.14-TIV-SSM-IF0008
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 1 README 4.0.0.15-TIV-SSM-IF0001

APAR status

• Closed as program error.

Error description

• The arithmetic subagent uses the OID object a lot. This object
  allocates and deallocates  uses memory in such a way that CPU
  consumption can be quite high when many of these objects are
  being used by a control row. We need to optimize CPU usage by
  reducing the amount of dynamic memory allocation.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Uses of the arithmetic subagent where the arithmetic subagent is
  monitoring a large number(thousands) of object ID's.
  ****************************************************************
  PROBLEM DESCRIPTION:
  The OID object was dynamically allocating and deallocating
  memory for every instance of which there were many. In
  environments where the monitored control tables had thousands of
  entries this causes some excessive CPU usage.
  ****************************************************************
  RECOMMENDATION:
  Either upgrade to Fix Pack 8 form SSM 4.0 or if possible and
  practical change the configuration to use the genalarm subagent.
  The genalarm subagent while limited in functionality is more
  efficient that the arithmetic subagent.
  
  ****************************************************************
  

Problem conclusion

• Altered the OID class to only use dynamic memory allocation if
  the OID length is larger than 32 elements. Otherwise the OID
  Object uses a static buffer.
  
  The fix for this APAR is contained in the following maintenance
  packages:
     | fix pack | 4.0.0-TIV-SSM-FP0008
  

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

  NETCOOL SYS SVC

• Fixed component ID

  5724P4300

Applicable component levels

• R400 PSY

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