PQ61342: PERFORMANCE IMPROVEMENT FOR TRANSACTION LOGGING

 Fixes are available

4.0.5: WebSphere Application Server Version 4.0 Fix Pack 5 (Version 4.0.5)
PQ61342, 4.0.3: Performance improvement for transaction logging



APAR status
Closed as program error.

Error description
Improvements to be made to transaction logging performance.
Local fix Problem summary
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* USERS AFFECTED: All WebSphere Application Server users       *
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* PROBLEM DESCRIPTION: Excessive I/O when using JTA enabled    *
*                      datasources.                            *
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* RECOMMENDATION:                                              *
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tranLogMirrored currently causes a keypoint of the tranlog
file to happen after 50 transactions, regardless of the size
of the tranlog files. This can result in excessive I/O when
using JTA enabled datasources.
Problem conclusion
tranLogMirrored will be changed to only perform a checkpoint
when the transaction log is 85% full, and so the number of I/Os
will be reduced.
Temporary fix Comments
APAR information
APAR number PQ61342
Reported component name WEBSPHERE AE AI
Reported component ID 5630A2200
Reported release 400
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Submitted date 2002-05-21
Closed date 2002-07-30
Last modified date 2002-07-30

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
TRANLOGM          

SRLS

Fix information
Fixed component name WEBSPHERE AE AI
Fixed component ID 5630A2200

Applicable component levels
R400 PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > General
Operating system(s):
Software version: 400
Software edition:
Reference #: PQ61342
IBM Group: Software Group
Modified date: Jul 30, 2002