DB2 - Problem description
Problem IT27034 | Status: Closed |
QUERIES USING HASH JOINS MAY HANG AND NOT BE ABLE TO BE FORCED OFF | |
product: | |
DB2 FOR LUW / DB2FORLUW / B10 - DB2 | |
Problem description: | |
The issue addressed in this APAR has the same symptom to APAR IT16615. Refer to IT16615 for more details: http://www-01.ibm.com/support/docview.wss?uid=swg1IT16615 | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Db2 11.1 Mod 4 Fixpack 4 or higher * **************************************************************** | |
Local Fix: | |
1. Same as APAR IT16615, use a fixed value for sortheap, instead of letting STMM tuning it. Check db2diag.log for sortheap tuning entries and choose a value at the upper end in order to avoid having too low sortheap memory. 2.Set the problem query degree to 1 using optimizer guideline: There may be performance impact for this query since setting degree to 1 is taking away the performance advantage of SMP. | |
Solution | |
Workaround | |
not known / see Local fix | |
BUG-Tracking | |
forerunner : IT24045 follow-up : | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 20.11.2018 27.11.2018 27.11.2018 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |