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DB2 - Problem description

Problem IC69817 Status: Closed

DATABASE CRASHES WHEN RUNNING OUT OF DBHEAP MEMORY

product:
DB2 FOR LUW / DB2FORLUW / 950 - DB2
Problem description:
We may run out of DBHEAP memory when it is set to a constant 
value instead of AUTOMATIC. During out of memory error, database 
may crash with the following messages. 
 
2010-06-23-03.24.40.510714-420 E42878116A738      LEVEL: Warning 
PID     : 27967                TID  : 38          PROC : db2sysc 
0 
INSTANCE: db2inst3             NODE : 000         DB   : EDMSCDB 
APPHDL  : 0-8                  APPID: *LOCAL.DB2.100326235846 
AUTHID  : DB2INST3 
EDUID   : 38                   EDUNAME: db2stmm (EDMSCDB) 0 
FUNCTION: DB2 UDB, SQO Memory Management, 
sqloMemLogPoolConditions, probe:30 
DATA #1 : <preformatted> 
Out of memory failure for Database Heap (DBHEAP) on node 0. 
Requested block size           : 291000 bytes. 
Physical heap size             : 67567616 bytes. 
Configured heap size           : 67829760 bytes. 
Unreserved memory used by heap : 0 bytes. 
Unreserved memory left in set  : 1519714304 bytes. 
 
2010-06-23-03.24.42.799250-420 I42878855A559      LEVEL: Error 
PID     : 27967                TID  : 38          PROC : db2sysc 
0 
INSTANCE: db2inst3             NODE : 000         DB   : EDMSCDB 
APPHDL  : 0-8                  APPID: *LOCAL.DB2.100326235846 
AUTHID  : DB2INST3 
EDUID   : 38                   EDUNAME: db2stmm (EDMSCDB) 0 
FUNCTION: DB2 UDB, base sys utilities, sqleagnt_sigsegvh, 
probe:1 
MESSAGE : Error in agent servicing application with coor_node: 
DATA #1 : Hexdump, 2 bytes 
0xFFFFFFFF574096C4 : 0000 
 
Callstack for EDU will show: 
##### Object: /opt/IBM/db2/V9.5/lib64/libdb2e.so.1 
__1cbAsqlbIncreaseBufferpoolSize6FpnPSQdDLB_BufferPool_pnVSQdDLB 
_BP_UC_ALTER_INFO_pnMSQdDLB_GLOBALS_ 
_i_(0x100017597c0,0x12388,0x45220,0xffffffff8b0f0002,0x0,0x8e17) 
+ 0x2ec 
__1cUsqlbResizeBufferPool6FpnPSQdDLB_BufferPool_pnVSQdDLB_BP_UC_ 
ALTER_INFO_pnMSQdDLB_GLOBALS__i_(0x1 
00017597c0,0x100463d1140,0xffffffff6cfe0080,0x3a4165c,0x0,0x9f40 
0) 
+ 0x134 
__1cbCsqlbAlterAutomaticBufferPool6FIipnIsqeAgent__i_(0x100463d1 
140,0x0,0x20066c100,0x100463d1140,0x 
0,0xffffffff7bf48e2a) + 0x470 
__1cYsqlrlStmmAlterBufferPool6FpnIsqeAgent_pciipnOdb2UCinterface 
_pnFsqlca__i_(0x20066c100,0xffffffff 
6cfec870,0x11c2c6,0x0,0xffffffff6d1ffd00,0xffffffff577fc570) + 
0x1a8 
__1cTstmmAlterBufferPool6FpnIsqeAgent_pcii_i_(0x20066c100,0xffff 
ffff6cfec870,0x16,0x11c2c6,0x0,0x0) 
+ 0x1b8 
__1cQstmmResizeRecord6FpnVstmmCostBenefitRecord_pnQsqeLocalDatab 
ase__i_(0xffffffff6cfec7c0,0x2013772 
c0,0xff,0x1d700000,0x80000,0x1) + 0x218 
__1cbKstmmIncreaseEntriesAndRemoveFromList6FpnQsqeLocalDatabase_ 
ppnVstmmCostBenefitRecord_I_i_(0x201 
3772c0,0xffffffff577fcb30,0x7a60,0x3fd,0x0,0x1d700000) + 0x16c 
__1cbIstmmResizeEntriesAndRemoveFromList6FppnVstmmCostBenefitRec 
ord_pnQsqeLocalDatabase__i_(0xffffff 
ff577fcb30,0x2013772c0,0x0,0x0,0x1d700124,0xc350) + 0x4ac 
__1cOstmmTuneMemory6FppnVstmmCostBenefitRecord_pnQsqeLocalDataba 
se__i_(0xffffffff577fcb30,0x2013772c 
0,0xffffffff577fc990,0x0,0xffffffff577fc980,0x1d700000) + 0x21c 
stmmMemoryTunerMain(0x2013772c0,0x0,0xa1640,0x18000000,0x1,0x4d6 
0) 
+ 0x304 
__1cbAsqleIndCoordProcessRequest6FpnIsqeAgent__v_(0x20066c100,0x 
a1ac8,0x0,0x20000,0xffffffff7d4f8750 
,0x18280400) + 0x63c 
__1cIsqeAgentGRunEDU6M_v_(0x20066c100,0xffffffff577fd838,0x18280 
400,0xffffffff7c9cdeb8,0xffffffff7d4 
f8728,0x4180) + 0x714 
__1cKsqlzRunEDU6FpcI_v_(0xffffffff577fdd20,0x0,0xffffffff7cddf87 
8,0xa1400,0x0,0x18d00000) 
+ 0x64 
sqloEDUEntry(0xffffffff5d3ef1d0,0xffffffff577fff58,0xaf6fb6,0xff 
ffffff7d4f87a0,0x18780000,0xffffffff 
7c9cdeb8) + 0x3dc
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* DATABASE CRASHES WHEN RUNNING OUT OF DBHEAP MEMORY           * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to 9.5 FP7                                           * 
****************************************************************
Local Fix:
Update DBHEAP database configuration parameter to AUTOMATIC
available fix packs:
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
 DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
 DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
 DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
Solution
DATABASE CRASHES WHEN RUNNING OUT OF DBHEAP MEMORY
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC71070 
follow-up :
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

09.07.2010
22.12.2010
22.12.2010
Problem solved at the following versions (IBM BugInfos)
9.5.FP7
Problem solved according to the fixlist(s) of the following version(s)
9.1.0.7 FixList
9.5.0.7 FixList