|
Problem IC81327
|
Status: Closed |
IN LOGRETAIN MODE, NEW LOG FILES ARE NOT CREATED IN DIO (DIRECT I/O) MODE WHICH MAY CAUSE POOR PERFORMANCE. |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
When using LOGARCHMETH1 set to LOGRETAIN, new log files were
not being created with Direct I/O. This can cause growth in
filesystem
cache during runtime, and may result in background VMM activity.
Note that this behaviour persists regardless of the setting of
DB2_LOGGER_NON_BUFFERED_IO. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Only customers using LOGRETAIN mode for log files. *
****************************************************************
* PROBLEM DESCRIPTION: *
* When using LOGARCHMETH1 set to LOGRETAIN, new log files are *
* *
* not created with Direct I/O. This can cause growth in *
* filesystem *
* cache during runtime, and may result in background VMM *
* activity. *
* *
* Note that this behaviour persists regardless of the setting *
* of *
* DB2_LOGGER_NON_BUFFERED_IO. *
****************************************************************
* RECOMMENDATION: *
* Apply Versoin 9.7 Fixpack 6 *
**************************************************************** |
| Local Fix: |
If the filesystem allows it, mount the filesystem in DIO mode. |
| available fix packs: |
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 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
Apply Versoin 9.7 Fixpack 6 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 09.02.2012
04.06.2012
04.06.2012 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP6
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.6
|
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