Symptom
- Database performance issue happens after starting an online backup with 3rd party vendor library.
- High swap utilization is observed.
- OS warning message is seen in db2diag.log after backup starts.
2025-05-28-11.00.06.959963+000 E19934171E489 LEVEL: Info
PID : 31095 TID : 139761423476480 PROC : db2sysc 0
INSTANCE: db2abc NODE : 000 DB : abc
APPHDL : 0-39091 APPID: *
AUTHID : DB2abc HOSTNAME: abc123
EDUID : 34716 EDUNAME: db2agent (abc) 0
FUNCTION: DB2 UDB, database utilities, sqlubSetupJobControl, probe:2066
MESSAGE : Starting an online db backup.2025-05-28-11.00.07.594522+000 I19934661E1319 LEVEL: Warning (OS)
PID : 3232 TID : 139751686219264 PROC : db2vend (db2med - 34992 (abc)) 0
INSTANCE: db2abc NODE : 000
HOSTNAME: abc123
FUNCTION: DB2 UDB, SQO Memory Management, sqlocshr, probe:210
MESSAGE : ZRC=0x850F00C4=-2062614332=SQLO_ADDR_CONFLICT
"An address space conflict was detected attaching to shared memory."
CALLED : OS, -, shmat OSERR: EINVAL (22)
DATA #1 : Memory set handle, PD_TYPE_OSS_MEM_SET_HDL, 48 bytes
<snipped>2025-05-28-11.00.07.659807+000 I19935981E412 LEVEL: Event
PID : 3232 TID : 139751686219264 PROC : db2vend (db2med - 34992 (abc)) 0
INSTANCE: db2abc NODE : 000
HOSTNAME: abc123
FUNCTION: DB2 UDB, oper system services, DB2VEND_main, probe:1060
MESSAGE : Process must re-exec due to address space conflicts.
DATA #1 : String, 29 bytes
/db2/dbabc/sqllib/bin/db2vend
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Environment
- SAP on IBM Db2 for Linux, Unix and Windows
- Linux
Product
Keywords
backup, performance, high SWAP, ASLR, OOM, address space conflict, db2vend , KBA , BC-DB-DB6 , DB2 Universal Database for Unix / NT , BC-DB-DB6-DBA , Database Administration , Problem
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