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Re: [platform-core-dev] How much memory can a Workspace take?
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Hi Martin,
Could I get the .hprof file?
--
Szymon
"Oberhuber,
Martin"
<Martin.Oberhuber To
@windriver.com> "Eclipse Platform Core component
Sent by: developers list."
platform-core-dev <platform-core-dev@xxxxxxxxxxx>
-bounces@eclipse. cc
org
Subject
[platform-core-dev] How much memory
2009-09-29 12:30 can a Workspace take?
Please respond to
"Eclipse Platform
Core component
developers list."
<platform-core-de
v@xxxxxxxxxxx>
Hi fellow committers,
I got a report about an OutOfMemoryError generated during a Workspace
Refresh operation. When looking at the .hprof file with the MemoryAnalyzer,
it turned out that pretty much all the memory was taken by core/Workspace
only:
100 MB (53%) in org.eclipse.core.internal.resources.Workspace
(occupied by ElementTree).
52 MB (27%) in org.eclipse.core.internal.dtree.DeltaDataTree (this is
a different additional DeltaDataTree)
37 MB all the rest.
The workspace was arguably very large, but still I am surprised
1. that the numbers are that large
2. that in addition to the Workspace, there is such a large additional
DeltaDataTree,
3. that I see an OutOfMemoryError reported with 189MB total where I used
-vmargs -Xmx320m ... what happened to the extra 131MB ?
Do my numbers sound reasonable, or could there be a bug that leads the
Workspace to take an excessive amount of memory? How much memory do we
expect a workspace to take for, say 50000 files? How much *additional*
memory may a workspace delta take that is generated during a Refresh? Would
any additional investigation using the Coretools make sense at this point?
I can make the .hprof file available on request (it's a 200MB ZIP file).
Many thanks for any pointers!
Cheers,
--
Martin Oberhuber, Senior Member of Technical Staff, Wind River
Target Management Project Lead, DSDP PMC Member
http://www.eclipse.org/dsdp/tm
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