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How to Increase heap size for MAT in IBM ISA?(How to Increase heap size for MAT in IBM ISA?)

Eclipse Memory Analyzer can download from eclipse.org. Unzip the downloaded file and double click 'MemoryAnalyzer' to start the application. Execute a Java program which is continuously running. The Eclipse Memory Analyzer is a fast and feature-rich Java heap analyzer that helps you find memory leaks and analyze high memory consumption issues. Go to Help - Software Updates - Find and Install. Select Search for new features to install and click Next. Click on New Archived Sites and browse to MemoryAnalyzer-extensions-update-site.zip. Similarly select dtfj-updatesite.zip and click Next. The Eclipse Memory Analyzer is a fast and feature-rich Java heap analyzer that helps you find memory leaks and reduce memory consumption.Use the Memory Analy.

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How to Increase heap size for MAT in IBM ISA?[message #507419]

Wed, 13 January 2010 12:36

Jeroen
Messages: 3
Registered: January 2010
Location: Netherlands

I'm running MAT inside the newest IBM ISA. I want to process quite large heap dumps. How can I enlarge the heap size available to MAT?
The usual trick for eclipse as documented in de FAQ does not work for me.
Thanks!
Jeroen.

Re: How to Increase heap size for MAT in IBM ISA?[message #507484 is a reply to message #507419]

Wed, 13 January 2010 16:09

Jeroen
Messages: 3
Registered: January 2010
Location: Netherlands

MAT seems to run in the ISA eclipse host IBM jvm. It's settings are:
-Xmn7m
-Xms48m
-Xmx256m
Which seem quite ridiculous to me.
If I try to set them in the ini file C:UsersMeIBMISAv41.configconfig.ini with:
eclipse.vmargs
-Xmn80m
-Xms256m
-Xmx1024m
or something similar, they are simply ignored.
I've searched my whole disk and I cannot find the to-replace parameters anywhere other then in javacore files (IBM threaddumps.)
Help much appreciated.
Jeroen.

Re: How to Increase heap size for MAT in IBM ISA?[message #507505 is a reply to message #507484]

Wed, 13 January 2010 17:37

Jeroen
Messages: 3
Registered: January 2010
Location: Netherlands

Okay, after some digging and looking here:
https://www.ibm.com/developerworks/forums/thread.jspa?messag eID=14217619&#14217619
and some more digging, I found that the vm arguments are set in the file:
jvm.properties
in location on my disk:
C:Program Files (x86)IBMIBM Support Assistant v41rcpeclipsepluginscom.ibm.rcp.j2se.win32.x86_1.6.0.200 90211a-200903301321
I recommend removing the -Xmn parameter for the new space size. Let this be handled by the gencon garbage collector itself. This will speedup the processing. For me it now takes about a minute to process a 1 GB heap. I have -Xmx1200m and -Xms256m.
---Jeroen

Re: How to Increase heap size for MAT in IBM ISA?[message #507928 is a reply to message #507505]

Fri, 15 January 2010 08:58

Krum Tsvetkov
Messages: 163
Registered: July 2009

Hi Jeroen,
Thanks for pasting also the solution to your problem! I guess other users of the tool can find it helpful.
Regards,
Krum

Re: How to Increase heap size for MAT in IBM ISA?[message #508041 is a reply to message #507505]

Fri, 15 January 2010 16:18

Andrew Johnson
Messages: 180
Registered: July 2009

This help page for Memory Analyzer from IBM Support Assistant suggests the following:
Tool: IBM Monitoring and Diagnostic Tools for Java™ - Memory Analyzer > Troubleshooting
Out Of Memory Errors
Processing large dump files
Processing large dump files using Memory Analyzer may sometimes fail with a java.lang.OutOfMemoryError. The default maximum Java heap size when running ISA 4.1 is 256Mb. We recommend running Memory Analyzer with at least 512Mb.
To set the maximum heap size you can add a property value to the rcpinstall.properties file.
Updating the rcpinstall.properties file
The rcpinstall.properties file resides in the following workspace location:
For Windows:
<home drive><home path>IBMISAv41.configrcpinstall.properties
For Linux:
<home>/ibm/isa41/.config/rcpinstall.properties
Add or update the value for vmarg.Xmx property. For example:
vmarg.Xmx=-Xmx512m
You will need to restart ISA for the change to take effect.

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Current Time: Wed Aug 11 15:03:26 GMT 2021

Thanks!

Good hint about OQL abbreviation! I just edited the description to spell it out the first time:

“…

Improvements and bug fixes in the Object Query Language (OQL) functionality

…”

I hope this will make the description more understandable.

Regards,

Krum

Eclipse Memory Analyzer Unreachable Objects

From:tools-pmc-bounces@xxxxxxxxxxx [mailto:tools-pmc-bounces@xxxxxxxxxxx] On Behalf Of David M Williams
Sent: Montag, 3. Juni 2013 15:27
To: Tools PMC mailing list
Subject: Re: [tools-pmc] Memory Analyzer 1.3.0 Release Review

Eclipse Memory Analyzer Oql

+1
Minor comment ... while I'm embarrassed to admit it now that I've looked it up in Wikipedia ... I wasn't immediately familiar with the acronym 'OCL' ... I might have missed it, but did not see it 'spelled out' anywhere in your review doc.
But, other than that minor thing, I thought it was very good.
Thanks,
From: 'Tsvetkov, Krum' <krum.tsvetkov@xxxxxxx>
To: 'tools-pmc@xxxxxxxxxxx' <tools-pmc@xxxxxxxxxxx>,
Date: 06/03/2013 04:51 AM
Subject: [tools-pmc] Memory Analyzer 1.3.0 Release Review
Sent by: tools-pmc-bounces@xxxxxxxxxxx

Eclipse Memory Analyzer Out Of Memory

Hi Tools PMC,
Please approve the release review for Memory Analyzer 1.3.0 (this is our Kepler release). I’ve prepared the documentation in the PMI:
https://projects.eclipse.org/projects/tools.mat/releases/1.3.0
IP Log has been submitted and is awaiting approval.
Regards,
Krum Tsvetkov
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