Too many open files error with Netty

[Trustin Lee (이희승)]

On Tue, Oct 27, 2009 at 7:37 PM, Albert Strasheim <fullung at gmail.com> wrote:
> Hello,
>
> 2009/10/27 Trustin Lee (이희승) <trustin at gmail.com>:
>> Sounds like you are not getting the 'too many open files' error
>> anymore.  Could you confirm it?
>
> That is correct.

Thanks for confirmation. :)

>> Do you get OutOfMemoryError in the end or is it just working fine?  I
>> do see saw-toothed patterns in the memory graph, but I never got an
>> exception so far.  If the connection rate is high, GC will be busy,
>> but I'm not sure it will slow down the application seriously.
>> Additional information is appreciated.
>
> When the maximum number of 10000 connections is active, about a
> hundred sessions are completing per second. But when it reaches about
> 25000 connections in total, I don't get OutOfMemoryError, but the
> application basically stops and just spends all its time GCing.

That is strange.  What happens if you increase the heap size to 512M
then?  Would you mind if you send me the heap dump file?  I will take
a look using my profiler.

Thanks

— Trustin Lee, http://gleamynode.net/