|
Problem IT19690
|
Status: Closed |
THE SQL USING INDEX WITH REVERSE SCAN WITH INTRA_PARALLEL MAY RUN SLOWER. |
| product: |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 |
| Problem description: |
The SQL doing index reverse scan with intro_parallel enable may
run slow.
The db2 trace with '-t' option shows you that the highest time
spent is for function 'sqliSkipRangeReverse'. The time spent by
this function is the key to hit this APAR. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Db2 10.5 Fix Pack 9 or higher *
**************************************************************** |
| Local Fix: |
Disable Intra_parallel, by
db2 update dbm cfg using INTRA_PARALLEL NO |
| Solution |
First fixed in Db2 10.5 Fix Pack 9 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 15.03.2017
29.09.2017
29.09.2017 |
| Problem solved at the following versions (IBM BugInfos) |
9.0.
|
| Problem solved according to the fixlist(s) of the following version(s) |
