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Problem IT30805
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Status: Closed |
EM_LIST_LATCH IS GRABBED AND RELEASED FREQUENTLY EVEN THERE IS NO TRANSACTION EVENT MONITOR CREATED/ACTIVE
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| product: |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 |
| Problem description: |
when UOW monitoring switch is ON, Db2 takes the trouble to
generate event monitor records even there is no transaction
event monitor created/active. In a high OLTP workload system,
this may cause unnecessary latch contention on
SQLO_LT_sqm_evmon_mgr__em_list_latch. The latch waiter should
be with a call stack as below:
sqloXlatchConflict + 0x5F0
agent_stmt_end__10sqlmon_acbFCUibP8sqlrr_cb + 0x2F0
agent_stmt_end__10sqlmon_acbFCUibP8sqlrr_cb + 0xA94
sqlrr_rds_common_post__FP14db2UCinterfaceiT2l + 0x1E2C |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* When UOW monitoring switch is ON *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Db2 V11.1 Latest Fixpack. *
**************************************************************** |
| Local Fix: |
Don't turn on UOW monitoring switch. |
| Solution |
|
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : IT22497
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 31.10.2019
31.10.2019
31.10.2019 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
