PQ75036: PERFLOAD COUNTER INTEGRAL DECREASING

 Fixes are available

PQ75036, 5.0.1: Integral of percentMaxed and percentUsed in perfLoad counter dec
5.0.2: WebSphere Application Server Version 5.0 Fix Pack 2 (Version 5.0.2)



APAR status
Closed as program error.

Error description
According to the definition, the integral part of PerfLoad
counters should be incremental by nature. But sometimes that the
integrals of percentUsed and percentMaxed for the top level of "
Connection Pools" decrease, i.e. that values for moment T2 is
smaller than those for moment T1, while T2 > T1. The problem
shows when you set the tperviewer to "View Data As" --> "Change
Value" and navigate to Viewer --> YourHost --> server1 --> JDBC
Connection Pools.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: WebSphere Application Server 5.0 (Base       *
*                 and ND) PMI Users                            *
****************************************************************
* PROBLEM DESCRIPTION: Incorrect connection pool percent used  *
*                      PMI metric. The percent used PMI        *
*                      metric in Connection Pool module        *
*                      doesn't provide correct value. The      *
*                      value may be negative at some points.   *
*                      The integral portion of the metric is   *
*                      not incremental.                        *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The calculation of pool size didn't bring the appropriate
counters to the current time and hence the integral
was negative which leads to a negative average.
Problem conclusion
The counters that are used to calcuate the pool size are
updated to have the same time for integral.  The problem is
fixed by updating the integral before using it.
Temporary fix Comments
APAR information
APAR number PQ75036
Reported component name WAS BASE 5.0
Reported component ID 5630A3600
Reported release 00W
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2003-06-09
Closed date 2003-06-25
Last modified date 2003-06-25

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
PMI data        

Publications Referenced

Fix information

Applicable component levels
R003 PSY    UP
R00A PSY    UP
R00H PSY    UP
R00I PSY    UP
R00P PSY    UP
R00S PSY    UP
R00W PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > General
Operating system(s):
Software version: 00W
Software edition:
Reference #: PQ75036
IBM Group: Software Group
Modified date: Jun 25, 2003