|
Problem IC98084
|
Status: Closed |
DATABASE MAY CRASH WHEN A REPLICATED MQT IS ENFORCED |
| product: |
DB2 FOR LUW / DB2FORLUW / A10 - DB2 |
| Problem description: |
Database crashes with the following stack:
_Z25ossDumpStackTraceInternalmR11OSSTrapFileiP7siginfoPvmm +
0x020a
ossDumpStackTraceV98 + 0x002b
_ZN11OSSTrapFile6dumpExEmiP7siginfoPvm + 0x0103
sqlo_trce + 0x0407
sqloEDUCodeTrapHandler + 0x0277
sqloCrashOnCriticalMemoryValidationFailure + 0x0020
sqlofmblkEx + 0x051d
_ZN14sqlnq_ulintSet7freeMemEv + 0x0062
_ZN15sqlnrDBConnInfo12freeMqtListsEv + 0x00bf
_Z10sqlnn_cmplP8sqeAgentP11sqlrrstrings17sqlnn_compileModesP14sq
lrr_cmpl_enviiPP9sqlnq_qur + 0x1eb5
_Z10sqlnn_cmplP8sqeAgentP11sqlrrstrings17sqlnn_compileModesP14sq
lrr_cmpl_env + 0x0021
This is a rare defect where a replicated MQT enforcement is
specified by either the registry control variable
DB2_EXTENDED_OPTIMIZATION or by the optimization guideline. The
query has a high number of subquery blocks that can be matched
to the replicated MQT and DB2 is unable to access the allocated
memory across multiple invocations of the DB2 compiler.
- The problem is introduced by v10.1 fix pack 3 APAR IC91051
- The only fix packs that contain this problem are v10.1 fix
pack 3 and v10.5 fix pack 3
- v9.7 doesn't have the problem |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 v10.1 fix pack 4. *
**************************************************************** |
| Local Fix: |
1. Unset registry control, or take off optimization guideline
that enforces the replicated MQT.
2. Rewrite query statement to use the replicated MQT directly. |
| available fix packs: |
DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows
|
| Solution |
First fixed in DB2 v10.1 fix pack 4. |
| Workaround |
See local fix. |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC98085 IC98378
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 03.12.2013
26.06.2014
26.06.2014 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.1.0.4
|
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