IC66613: DB2EXT.TEXTSEARCH(FUZZY FORM OF 80 "99????8" CAUSES LARGE AMOUNTS OF MEMORY TO BE ALLOCATED BUT NOT FREED

DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

APAR status

• Closed as fixed if next.

Error description

• Some of the queries using NSE Fuzzy search on numerical/alphanum
  values consumes lot of memory and results in a system hang or
  CTE0104 error. The memory allocated is not freed even after the
  termination of application.
  
  This APAR fix addresses the following:
  
  1.Memory is freed after the query returns with  CTE0104 error.
  2.Reduces the memory consumption in case of Fuzzy search on
  alphanumerical values that contain a combination of SBCS and
  DBCS characters
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL DB2+NSE Users and Content Manager Users                  *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Some of the queries using NSE Fuzzy search on                *
  * numerical/alphanumeric values consumes lot of memory and     *
  * results in a system hang or return CTE0104 error. The memory *
  * allocated is not freed even after the termination of         *
  * application.                                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to IBM DB2 Net Search Extender V.9.5.0.6             *
  ****************************************************************
  Problem Statement:
  Fuzzy search on a numerical/alpha-numerical columns fails with
  CTE0104 error consuming lots of memory. After the error the
  memory allocated is not freed by NSE.
  
  This APAR fixes the above problem by freeing the allocated
  memory after the CTE0104 error.
  

Problem conclusion

• This APAR fix addresses the following:
  1.Memory is freed after the query returns with CTE0104 error.
  2.Reduces the memory consumption in case of Fuzzy search on
  alphanumerical values that contain a combination of SBCS and
  DBCS characters
  
  The problem is fixed in IBM DB2 Net Search Extender V.9.5.0.6
  

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:

  IP23023 IC68086 IC68089

Fix information

Applicable component levels

• R950 PSY

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