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Re: [eclipselink-users] memory leak
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David,
Hi, the SUN JDK has some rudimentry memory heap and GC tools available
via jconsole.exe in the bin directory after you attach to your java process.
See the following persistence unit property to turn off caching at the
PU level
http://wiki.eclipse.org/Using_EclipseLink_JPA_Extensions_(ELUG)#How_to_Use_the_Persistence_Unit_Properties_for_Caching
<property name="eclipselink.cache.type.default" value="NONE"/>
"NONE – This option does not preserve object identity and does not cache
objects. Oracle does not recommend using this option.
For more information, see No Identity Map. "
See the following for more granular entity level caching via annotations
for example
http://help.eclipse.org/galileo/index.jsp?topic=/org.eclipse.jpt.doc.user/task_manage_persistence.htm
http://wiki.eclipse.org/Introduction_to_Cache_(ELUG)#Unit_of_Work_Cache
http://wiki.eclipse.org/EclipseLink/Examples/JPA/Caching
thank you
/michael
David Parker wrote:
I am trying to track down a memory leak in our application that
happens under moderate read/write load. It's the nature of our app
that each write involves several reads from the db first.
I am not having much luck with the Netbeans profiler, so I'm kind of
casting around for tools to use.
I'd like to reduce the amount of caching eclipselink does to the
absolute minimum -for the purposes of this testing I'm not concerned
with performance. But I'm not sure a safe way to do that. I get the
impression from the doc that the "identity map" and "cache" are the
same thing, and it looks like I can't run without an identity map.
What can I set in Persistence.xml to reduce caching in eclipselink?
Also, I would be really appreciative of any suggestions on how to go
about tracking this down. My dev environment is OS X, on which JProbe,
for instance, doesn't run. Using eclipselink 1.1.2
TIA.
- DAP
=============================================
David Parker
dap@xxxxxxxxxxxxxxxxxxxx
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