PQ72579: PERFORMANCE DEGRATION AFTER UPGRADING FROM WAS 4.0.3 TO WAS WAS 4.0.5 | |||||||||||||||||||||||||||||||||||
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![]() APAR status Closed as program error. Error description The problem occurs once the application is moved from 4.0.3 to 4.0.5. Upon moving to 4.0.5, the response time and garbage collection goes up - sometimes almost 200%. In looking at traces, it looks like 4.0.3 is using less of the ORB and in 4.0.5 it looks like more. The user has com.ibm.CORBA.iiop.noLocalCopies=true specified in both 4.0.3 and 4.0.5.Local fix Problem summary **************************************************************** * USERS AFFECTED: WebSphere Application Server Developers * * using the ORB. * **************************************************************** * PROBLEM DESCRIPTION: com.ibm.CORBA.iiop.ClientDelegate * * .is_local() causes unnecessary * * lookups assuming the servant is * * disconnected. * **************************************************************** * RECOMMENDATION: * **************************************************************** com.ibm.CORBA.iiop.ClientDelegate.is_local() does a check to see if a servant is disconnected. If so, it will perform a new lookup. The check was too strict and causes unnecessary lookups that are expansive.Problem conclusion Corrected the check in ClientDelegate.is_local(). The code no longer requires the servant lookup when it is not needed.Temporary fix Comments
APAR is sysrouted FROM one or more of the following: APAR is sysrouted TO one or more of the following: Modules/Macros
SRLS
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Document Information |
Product categories: Software > Application Servers >
Distributed Application & Web Servers > WebSphere Application
Server > General
Operating system(s):
Software version: 400
Software edition:
Reference #: PQ72579
IBM Group: Software Group
Modified date: May 12, 2003
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