How to Force GC in JBoss 7.2 after every 30 min.

[anelsonwilson]

I want to force Garbage Collection in JBoss 7.2. Is there any way to force GC in JBoss at every particular interval. Please help.

[welle]

Not really, but you can call System,gc() to "hint" the JVM to perform a garbage collection from scheduled SLSB.

BUT I DO NOT UNDERSTAND WHY YOU WOULD DO THAT!

[wdfink]

As Anders Welen said there should be no need to force GC in a server environment.

In my experience that only force unwanted fullGC's.

You might explain why you mean you need it. Often a well tuned GC is the better solution.

[anelsonwilson]

I have found on the server that due to some reason the heap stack is overflowing.Frequently the JBoss 7.2 server is giving out of memory exception.Thus I thought to implement  force GC in JBoss.So I have decided to run GC every 30 min to overcome this problem

Any suggestion will be helpful.Thanking you.

[anelsonwilson]

I have tried the following:-

-Dsun.rmi.dgc.server.gcInterval=3600000 inside domain.xml

And its working. Any suggestion will be helpful.Thanking you.

[anelsonwilson]

Hi Wolf-Dieter Fink, 

Thanks.

As you mentioned that:- a well tuned GC is the better solution.

Can you please help me how to tune GC.  

[wdfink]

Hi Nelson,

GC tuning is a ongoing job as it is wired to the application and throughput.

You need to understand how the JVM meap management work and tune the GC parameter to work with your applicaiton.

Often you can not say that more heap-space will help, you can run an application with a huge throughput with less than 1.5GB heap in a 32bit VM.

A good stating point will be Tuning Garbage Collection Java6

[anelsonwilson]

Thank You very much Wolf-Dieter Fink.

[erasmomarciano]

You can create a script with jmap

http://docs.oracle.com/javase/7/docs/technotes/tools/share/jmap.html

You have to  run your script after 30 minute