|
Problem IC88218
|
Status: Closed |
POTENTIAL SLOW LOAD PERFORMANCE WITH MDC/RP TABLE AND GPFS DUE TO MISALIGNED MEMORY BUFFER |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
When running DB2 LOAD operations into MDC and/or Range
Partitioned tables that reside on GPFS file system, we might see
slow performance together with high GPFS CPU usage. This is
caused by some LOAD code using "non-aligned memory buffer" to do
GPFS Direct I/O.
(Similar code problem potentially exists for regular (non-MDC
and non-RP) tables, but to a much smaller extent; in practice
there should be negligible performance issue with regular
tables.) |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* LOAD + GPFS users *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 Version 9.7 Fix Pack 8. *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
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 |
Problem was first fixed in DB2 Version 9.7 Fix Pack 8. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 14.11.2012
01.04.2013
01.04.2013 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP8
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.8
|
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