Fixes are available
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
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 5 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 7 for Linux, UNIX, and Windows
APAR status
Closed as program error.
Error description
On a database running with INTRA_PARALLEL=YES and DEGREE higher than 1, if application is failing with out of memory and following command db2pd -alldbs -memblocks appl | grep -A 10 "All memory cons" shows that one allocation is taking entire application heap: All memory consumers in Application memory set: PoolAddr PoolID PoolName SecondID TotalSize(Bytes) %Bytes TotalCount %Count LOC File 0x00007FEAEB958CE8 1 apph 15638 7619892696 89.43 879489 0.29 1102 1984253944 where 7619892696 is the size of entire application heap. Plan that is taking all this memory has REBAL operator and above allocation is coming from REBAL code. This fix is needed to control memory consumed by REBAL
Local fix
db2set DB2_COMPILER_SMP_OVERRIDES=1 (requires instance recycle)
Problem summary
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Db2 version 111m3fp3 * ****************************************************************
Problem conclusion
APPLICATION HEAP CAN BE EXHAUSTED BY REBAL FUNCTION AND THIS CAN LEAD TO APPLICATION FAILURE WITH OUT OF MEMORY
Temporary fix
see Local Fix
Comments
APAR Information
APAR number
IT22284
Reported component name
DB2 FOR LUW
Reported component ID
DB2FORLUW
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-09-06
Closed date
2018-03-15
Last modified date
2018-08-16
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
DB2 FOR LUW
Fixed component ID
DB2FORLUW
Applicable component levels
RB10 PSN
UP
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
Document Information
Modified date:
04 May 2022