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| Problem | It is sometimes difficult or impossible to collect a heapdump from a WebSphere® Application Server Java Virtual Machine (JVM) that is suspected of having memory allocation or storage issues. It is possible, however, to generate a heapdump from a JVM core file. | | Cause | How to collect heap information on AIX | | Solution | Generating a heapdump file from an AIX core file:
A heap dump file can be generated from an AIX core file utilizing the jcore tool attached below.
The command is:
./jcore [core] -d > heapdump.txt
This command regenerates a heapdump_fromcore.txt file from an AIX core file even though the core file might have been generated from an older Java™ SDK build without heapdump support.
This process can take a considerable amount of time to complete. For example, a 1 GB heap that includes many small objects might take 30 minutes to process.
Note: You can download Jcore from the document referenced the Related information section. | |
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Product categories: Software, Application Servers, Distributed Application & Web Servers, WebSphere Application Server, Java SDK Operating system(s): AIX Software version: 3.5, 4.0, 5.0, 5.1, 6.0 Software edition: Edition Independent Reference #: 1162811 IBM Group: Software Group Modified date: 2004-03-09
(C) Copyright IBM Corporation 2000, 2004. All Rights Reserved.
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