Re: [Wrapper-user] JVM Exit Code 128

[Nathan W. <wr...@de...>]

On 11/14/07, Leif Mortenson <le...@ta...> wrote:
>
>
> > I assume things can get strange when swapping starts.
> In my experience, Java behaves VERY poorly when its memory is swapped.
> Things can start running 100 to 1000 slower depending on how bad the
> swapping is.  You want to be careful to make sure that there is always
> enough memory to keep the OS and JVM completely in memory.
>
> I have seen this lead to crashes with Java 1.3.  But not with newer JVMs.



UseParallelGC is documented to crash the JVM if the memory sweep takes too
much time.
I don't have any experience with the alternate collection behavior, just
going from the docs:

"The parallel garbage collector (UseParallelGC) throws an out-of-memory
exception if an excessive amount of time is being spent collecting a small
amount of the heap.
http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html