|
Problem IC68135
|
Status: Closed |
POSSIBLE SUB-OPTIMAL QUERY PERFORMANCE WITH DB2_WORKLOAD SET TO SAP AND CATALOG TABLE STRING COLUMN(S) USED IN COMPARISON(S) |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
In SAP environments, controlled with the DB2_WORKLOAD registry
variable set to a value of SAP, poor query performance may be
experienced when catalog tables are used. Additional conditions
are:
- Database collation is IDENTITY_16BIT
- A column from a catalog table is used in a relational operator
for comparison
- The catalog table column is a string column, i.e., CHAR or
VARCHAR
- There is a filtering index available on the other column used
in the comparison |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* All SAP environments *
****************************************************************
* PROBLEM DESCRIPTION: *
* In SAP environments, controlled with the *
* DB2_WORKLOADregistryvariable set to a value of SAP, poor *
* query performance maybeexperienced when catalog tables are *
* used. Additionalconditionsare:- Database collation is *
* IDENTITY_16BIT- A column from a catalog table is used in a *
* relationaloperatorfor comparison- The catalog table column *
* is a string column, i.e., CHAR orVARCHAR- There is a *
* filtering index available on the other columnusedin the *
* comparison *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 V9.7 FP3 *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 9.7 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
First fixed in DB2 V9.7 FP3 |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC69847
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 23.04.2010
07.10.2010
07.10.2010 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP3
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.3
|
 |
| 9.7.0.3
|
|
