PI88370: MEMORY BUFFER TRACE OUTPUT PERFORMANCE IS SLOW WHEN BASIC TRACE FORMAT IS USED.

Fixes are available

APAR status

Closed as program error.

Error description

When the trace output is set to Memory Buffer, with trace enable
and the trace format set to Basic, the execution time is heavily
spent on retrieving the LogRecordStack for each AsyncLogRecord.
The retrieval of the LogRecordStack is only needed when the trac
format is set to Advanced.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server                                      *
*                  Version 8.5.5 and 9.0, who enable the       *
*                  Memory                                      *
*                  Buffer trace output, with the trace format  *
*                  set                                         *
*                  to Basic.                                   *
****************************************************************
* PROBLEM DESCRIPTION: The performance of the Memory buffer    *
*                      trace                                   *
*                      output is slow when the trace format is *
*                      set to Basic.                           *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When tracing is enabled to use Memory Buffer output with Basic
trace format, the execution time is heavily spent on retrieving
the
LogRecordStack for each AsyncLogRecord. This causes a
performance
impact on tracing, because the LogRecordStack is not needed for
Basic trace format, it is only needed, when the trace format is
set
to Advanced.

Problem conclusion

The code was optimized to improve the Memory Buffer performance,
when the trace format is Basic. The code was changed to only
retrieve the LogRecordStack, when the trace format is set to
Advanced.

The fix for this APAR is currently targeted for inclusion in
fix pack 8.5.5.13 and 9.0.0.6.  Please refer to the Recommended
Updates
page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI88370
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
900
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-10-05
Closed date
2017-10-12
Last modified date
2017-12-05

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WEBS APP SERV N
Fixed component ID
5724H8800

Applicable component levels

R850 PSY
UP
R900 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022

Tips

PI88370: MEMORY BUFFER TRACE OUTPUT PERFORMANCE IS SLOW WHEN BASIC TRACE FORMAT IS USED.

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R850 PSY

R900 PSY

Document Information

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