PM35809: AVERAGE CPU TIME IN 120.X RECORDS IS NOT COMPUTED CORRECTLY

Fixes are available

APAR status

Closed as program error.

Error description

The average CPU time computed in the SMF 120.x records was
computed as type long but, using divison by an int.  This causes
a loss of percision which can be significant.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application Server
*                  V6.1.0                                      *
****************************************************************
* PROBLEM DESCRIPTION: Average CPU time in SMF 120 subtype 6   *
*                      and SMF 120 subtype 8 interval records  *
*                      are not accurate.                       *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Average CPU time (SM120JMQ) in SMF 120 subtype 6 interval
records is not accurate. Average CPU time (SM120WJ4) in SMF 120
subtype 8 interval records is not accurate.
SM120JMQ and SM120WJ4 are not accurate because the code is
keeping a running average using integer addition and division.
Losing the remainder each time the running average is
recalculated causes the average CPU time to be inaccurate.

Problem conclusion

Changed the code to keep the total cpu time and divide once
when the record is written.

APAR PM35809 is currently targeted for inclusion in
Service Level (Fix Pack) 6.1.0.39 of WebSphere
Application Server V6.1.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

Temporary fix

Comments

APAR Information

APAR number
PM35809
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-03-29
Closed date
2011-04-12
Last modified date
2011-08-01

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

PM36288

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R610 PSY UK69361
UP11/07/16 P F107

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
27 October 2021

Tips

PM35809: AVERAGE CPU TIME IN 120.X RECORDS IS NOT COMPUTED CORRECTLY

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

R610 PSY UK69361

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

Document Information

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