RapidMiner

RapidMiner

GC overhead limit exceeded

GC overhead limit exceeded

Hello,

for an extensive GridParameterOptimization, RapidMiner terminates after
a while with:

OutOfMemoryError
Process failed Message:
GC overhead limit exceeded

How can I fix this problem?

More memory for the JVM is not possible since all my 4GB are already
used.

On
http://java.sun.com/javase/technologies/hotspot/gc/gc_tuning_6.html#par_gc.oom
I found that with the option "-XX:-UseGCOverheadLimit" this error can be
avoided. Is this a good solution?

Or should I try to integrate the MemoryCleanUp operator into my model (which
is very simular to sample 11 in the meta validation directory).

Best regards,
Sascha
2 REPLIES

Re: GC overhead limit exceeded

Hey Sascha,

If your app has a lot of concurrent procceses, or it uses a lot of recursion, you should take a look at the Concurrent Collector ..

Here you'll find a lot of information about it http://java.sun.com/javase/technologies/hotspot/gc/gc_tuning_6.html#par_gc.oom

If you have multiple proccessors, then the Concurrent Collector may be very helpful here ..


Hope this helps ..


C ya
Elite

Re: GC overhead limit exceeded

Hi Sascha,
could you post your process here and tell us, how many memory is available? This is shown in the memory monitor on the lower right.
And take a look at the log messages if there are some warnings.


Greetings,
  Sebastian