|
Problem IT22211
|
Status: Closed |
QUERY PERFORMANCE ISSUE WITH SMP PARALLELISM AND "LIMIT ?" CLAUSE |
| product: |
DB2 FOR LUW / DB2FORLUW / B10 - DB2 |
| Problem description: |
Query performance issue with SMP/intra partition parallelism
(INTRA_PARALLEL YES) and "LIMIT ?" clause.
In case of "LIMIT N" clause that uses a host variable (?) for N,
then a performance issue is encountered.
You may observe much more rows_read than what is expected or
when compared to using a literal instead for N. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Db2 11.1 Mod 2 Fix Pack 2 iFix001 or higher *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
Db2 Version 11.1 Mod2 Fix Pack2 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod2 Fix Pack2 iFix002 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 3 Fix Pack 3 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix002 for Linux, UNIX, and Windows
|
| Solution |
First fixed in Db2 11.1 Mod 2 Fix Pack 2 iFix001 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 30.08.2017
11.10.2017
11.10.2017 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
