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Is it possible to get OutOfMemoryError because garbage collection too slow?

Tags:

java

garbage-collection

out-of-memory

In java, is it possible that you get a OutOfMemoryError exception, even when there should have enough memory should garbage collection freed more memory? In other words, if there is not enough memory to allocate, will gc be forced to run before throwing the OutOfMemoryError?

Thanks.

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Jacky Chen Avatar asked Jan 03 '12 21:01

Jacky Chen

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1 Answers

There is one case where you might get an OOM which is neither heap related or address space related: it is when the JVM decides the GC takes too much time to run.

See here.

In other words, the answer to your original question, that is, "if there is not enough memory to allocate, will gc be forced to run before throwing the OutOfMemoryError", is yes.

(you will see from the link above that the ratio is 98%/2% for gc/running code, which is very high already)

(note 2: this is for Sun's/Oracle's JVM, no idea for other implementations)

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fge Avatar answered Oct 20 '22 21:10

fge
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