|
Problem IC66149
|
Status: Closed |
LARGE CPU OVERHEAD WHEN THE UOW EVENT MONITOR IS ACTIVE AND COLLECTING DATA |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
When an UOW, Activities, Locking or Package Cache event monitor
is active and collecting data, workloads can experience a large
CPU overhead by the fast writer threads which are processing and
committing the event monitor records. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Anybody using an UOW, Activities, Locking or Package Cache *
* event monitor. *
****************************************************************
* PROBLEM DESCRIPTION: *
* When an UOW, Activities (SQL Table only, not File or Pipe), *
* Locking or Package Cache event monitor is active and *
* collecting data, the fast writer threads can consume a large *
* amount of CPU time. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to V9.7 Fix Pack 2 or higher. *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
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 |
In V9.7 Fix Pack 2 the fast writer threads (db2fw0, db2fw1,
db2fw2, db2fw3) will consume less CPU time. |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC66555
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 08.02.2010
14.05.2010
14.05.2010 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP2
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.2
|
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