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DB2 - Problem description

Problem IC63965 Status: Closed

DATABASE HUNG DUE TO STALE DIRTY PAGES OF TEMP TABLES IN BUFFERPOOL
THAT CAN NOT BE FLUSHED.

product:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problem description:
When db2 is shutting down database, it attempts to flush all 
the dirty pages in bufferpool. But it finds some dirty pages of 
temp tables has no owner. This stale direty pages cause the 
db2agent stuck in the following place: 
 
##### Object: /usr/lib/sparcv9/libc.so.1 
__systemcall(0xffffffff7ffee3d0,0x35,0x2,0x1cf019f,0xffffffff7ff 
ee490,0x1) + 0x34 
semop(0x1cf019f,0xffffffff7ffee490,0x1,0x3750,0x1ffff,0x20000) + 
0x18 
##### Object: /SAN03/data/db2/db2dmp01/sqllib/adm/db2sysc 
__1cRSQdDLO_SLATCH_CAS64NstateToString6FklkpckL_v_(0x20001cd58,0 
x0,0x10000,0x280000,0x0,0x18780000) + 0x130 
__1cRSQdDLO_SLATCH_CAS64SgetConflictComplex6MkL_v_(0x221628960,0 
x0,0x20001cd58,0x1ffff,0x2a0a28,0x28) + 0x470 
__1cRSQdDLO_SLATCH_CAS64LgetConflict6MkL_i_(0x221628960,0x10000, 
0x1fc00,0x1fc00,0x10000,0x10000) + 0xf0 
__1cTsqlbVerifyNoDirties6FpnMSQdDLB_GLOBALS_pnQSQdDLB_OBJECT_DES 
C_I_v_(0x221628960,0x10000,0x102c1d140,0x0,0x1,0x1) + 0x106c 
__1cUsqlbFlushForDLSubset6FpnJSQdDLP_LSN8_IHiipnMSQdDLB_GLOBALS_ 
_i_(0x221a33e58,0x10000,0x0,0x102c09d80,0x102dd02c0,0xffffffffff 
fc0000) + 0xd48 
__1cIsqlpthrd6FpnUsqle_agent_privatecb_L_i_(0x102c08180,0x100000 
,0x7bc8,0x220010080,0x220017080,0x8a00) + 0x2f4 
__1cSsqlbTerminateAgent6FpnMSQdDLB_GLOBALS_i_i_(0x102c09d80,0x34 
3,0x1,0x0,0x0,0x1) + 0xd54 
__1cTsqleAgentDissociate6FpnNsqle_agent_cb_i_i_(0x200eb8080,0xff 
ffffff7ffef41c,0x0,0x338,0x102b80630,0x100) + 0x3a0 
__1cRsqleTermDbConnect6FpnNsqle_agent_cb_pnIsqledbcb_pnFsqlca_pn 
VsqleTermConnectStatus__i_(0x200eb8080,0x0,0x102c08368,0xfffffff 
f7ffef8f4 ,0x200eb0080,0x17e4) + 0x20fc 
__1cIsqlesrsp6FpnUsqle_agent_privatecb_CpnFsqlca_i_i_(0x102c0818 
0,0x1000000,0x102c08368,0x18280000,0x0,0x200eb8080) + 0xc84 
 
 
db2pd -tcbstats may show some temp table exists whose 
Application Handle does not exist. For example, in db2pd 
-tcbstats, you may find "TEMP (00030,00006) <1537><S" where 1537 
is the Application Handle created this TEMP table ID 6 in 
tempspace ID 30. But Application Handle 1537 does not exist in 
db2pd -applications nor in db2 snapshot for applications.
Problem Summary:
DATABASE HUNG DUE TO STALE DIRTY PAGES OF TEMP TABLES IN 
BUFFERPOOL THAT CAN NOT BE FLUSHED.
Local Fix:


available fix packs:


DB2 Version 9.7 Fix Pack 1 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 2 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 3 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 3a for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 4 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
 


Solution


First fixed in DB2 UDB Version 9.7, FixPak 1


Workaround


not known / see Local fix


Timestamps


Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

22.10.2009
28.12.2009
28.12.2009


Problem solved at the following versions (IBM BugInfos)


9.7.



Problem solved according to the fixlist(s) of the following version(s)


9.7.0.1

FixList