Re: GC error

Some might think Attila is being harsh, and there may be a reply already
saying something to that, but let me recite a war story.

Many years ago (about 1972 or so) my phone rang with a person on the
other end asking a fairly simple question related to JCL.  I innocently
said something like, "Wasn't that in the manual?"  The answer was that
he was in a hurry to leave for the day and didn't want to take the time.
I told him it would really be a good idea to look things up himself,
because he would find a lot of decent information and learn more than
just the answer to one question.  The discussion got rather heated.

A couple of days later he called me back, apologized, and told me that
in looking up the answer to his question he found a simple change to
make that saved him close to $1000 a day in charges at a different
computer center.  This was not internal budget funny money, but real
dollars that had to be paid out.  $1000 a day is pretty good money
today, but 35 years ago it was much bigger.

So, Attila's advice is very good, not just for Avinash, but for the rest
of us.

Ivan Mann 



 

-----Original Message-----
From: Discussion of advanced Java topics.
[mailto:[email protected]] On Behalf Of Attila Szegedi
Sent: Thursday, August 23, 2007 3:23 AM
To: [email protected]
Subject: Re: [ADVANCED-JAVA] GC error

Avinash,

without wanting to sound too harsh, could you consider at least trying
to research for a solutions to your problems yourself before posting
here? I mean, just searching for the exact error message "GC overhead
limit exceeded" with Google reveals this question has been asked here
last year:  
<http://forum.java.sun.com/thread.jspa?threadID=5114529> (the first hit
from Google), and somebody already answered there by pointing to
<http://java.sun.com/javase/technologies/hotspot/gc/gc_tuning_6.html#par
_gc.oom>
which explains it nicely.

I mean, this is really nothing anybody with minimal web literacy
couldn't have figured out on their own.

Despite this list being "ADVANCED-JAVA", the bunch on this list is
usually very glad to answer more basic questions as well, but we really
appreciate if we see people respect our time and don't use us as a
substitute for a minute or two of Googling.

Thank you for the consideration.

Attila.

On Thu, 23 Aug 2007 07:25:19 +0200, Avinash Lakshman
<[email protected]> wrote:

> java.lang.OutOfMemoryError: GC overhead limit exceeded
>
> Has anyone seen this error before ? I am running on a 64 bit machine 
> with JDK1.6.0_01. I am starting this process -Xmx flag set to 8GB. Is 
> this a VM bug or do I have to start looking into the GC behavior ?
>
> Please advice.
>
> Thanks in advance
> Avinash
>

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