Hibernate - OutOfMemoryError - java heap size

Question

I'm currently having this problem where I am executing a query that will load large of records. At first execution, it is successful, but when I execute again, I am having java heap size out of memory.

I Know I can increase java heap size using command line, but that requires a compiled jar file. But I am currently on the development process, so how can I increase java heap size in that case?

Im using Elipse as my IDE.

Thanks for any response.

See this question: http://stackoverflow.com/questions/880855/increase-the-java-heap-size-permanently. Is that what you are looking for? — joscarsson, Mar 10 '12 at 08:14
Be careful. It may be that you're not using Hibernate properly and it certainly sounds like the application you're building could end up with memory issues. — James DW, Mar 10 '12 at 17:08
@ james DW, although it worked by adding a vm argument -Xmx1024m, I am still considering your suggestion, I think there is also problem on how I used hibernate that's why I'm having this error! — Jc dev, Mar 11 '12 at 23:45

score 3 · Answer 1 · answered Mar 10 '12 at 08:15

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It doesn't require a compiled jar file. Choose Run - Run configurations... - Select your run configuration - Arguments tab. Then enter the appropriate command line argument in the VM arguments text box: -Xmx1024m for example.

answered Mar 10 '12 at 08:15

JB Nizet

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Recto, if this was the correct answer you should mark it as such. – joscarsson Jul 17 '12 at 08:32

score 0 · Answer 2 · answered Mar 10 '12 at 08:14

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You can modify the eclipse.ini file located inside of our eclipse directory .
There you will find Xms40m Xmx256m parameter with some value , you can increase it to Xms256m Xmx1024m . Then check whether outofmemory error is still there . If its there then try tuning these parameter slightly increasing and check.

answered Mar 10 '12 at 08:14

arshwarsi

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This will modify Eclipse's own memory parameters. It won't change the memory parameters of the programs launched by Eclipse. – JB Nizet Mar 10 '12 at 08:15
Yeah right . Actually all the component using java memory can be handeled by providing these parameters in different places. Like when when starting the server with these parameters – arshwarsi Mar 10 '12 at 08:18

score 0 · Answer 3 · answered Mar 10 '12 at 08:18

Apperently that was not enough for an answer... well, let me just copy the text from those answers instead :S

You can use the environment variable _JAVA_OPTIONS to set the default heap size. This will change the heap size for all Java programs. Like this:

export _JAVA_OPTIONS="-Xmx1g"

Hibernate - OutOfMemoryError - java heap size

3 Answers3