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Bug 245410

Summary:	Print Histogram of Unreachable Objects
Product:	[Tools] MAT	Reporter:	Andreas Buchen <andreas.buchen>
Component:	Core	Assignee:	Andreas Buchen <andreas.buchen>
Status:	RESOLVED FIXED	QA Contact:
Severity:	enhancement
Priority:	P3	CC:	jochenstiepel
Version:	unspecified
Target Milestone:	---
Hardware:	All
OS:	All
Whiteboard:

Description Andreas Buchen

2008-08-27 12:15:47 EDT

During the index creation, the Memory Analyzer removes unreachable objects because the various garbage collector algorithms tend to leave some garbage behind (if the object is too small, moving and re-assigning addresses is to expensive). For debugging purposes, the Memory Analyzer should (optionally) print out a histogram of the unreachable objects.

Comment 1 Andreas Buchen

2008-08-29 12:19:19 EDT

Committed initial version with CL 122.

~\mat> echo org.eclipse.mat.parser/debug=true >.options
~\mat> MemoryAnalyzer -debug [-application org.eclipse.mat.api.parse <heap dump>]

Comment 2 Andreas Buchen

2008-10-24 09:49:41 EDT

closing bug. Feature is available for download.

Comment 3 Jochen Stiepel

2009-01-27 05:43:14 EST

It would be helpfull to find this information, also in the wiki of MAT.

Like:

To show debug output of MAT:
1. Create or append to the file ".options" in the eclipse main directory the line:

org.eclipse.mat.parser/debug=true

2. Start eclipse with the -debug option. This can be done by appending -debug to the eclipse.ini file in the same directory as the .options file.

Comment 4 Jochen Stiepel

2009-01-27 05:56:25 EST

The bug 262531 also covers this feature.

https://bugs.eclipse.org/bugs/show_bug.cgi?id=262531

Comment 5 Andreas Buchen

2009-01-27 06:00:54 EST

@Jochen: added to FAQ, thx.
I will comment on the other bugzilla.