Interesting blog post comparing netty to raw NIO

["이희승 (Trustin Lee)"]

I implemented pretty simple workaround in NioWorker but I'm not sure it
is working.  So far, as far as I remember, nobody reported this bug when
using Netty.  If someone experienced this issue, please report it to me.

HTH

Bo Hu wrote:
> I just learned a jvm
> bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6403933, which
> will cause 100% cpu usage.
> 
> <http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6403933>I searched
> into the source code of Netty, and didn't find related information. 
> 
> Does Netty have a workaround about this bug?
> 
> On Wed, Aug 25, 2010 at 8:49 AM, "이희승 (Trustin Lee)"
> <trustin at gmail.com <mailto:trustin at gmail.com>> wrote:
> 
>     Yeah, it's interesting indeed - I never tested that far obviously. :)
> 
>     I'm not sure about the 100% CPU issue with no logged exceptions though
>     since Netty doesn't swallow an exception.  Maybe GC thrashing or VM bug?
> 
>     On 08/25/2010 05:41 AM, falconair wrote:
>     >
>     >
>     http://blog.urbanairship.com/blog/2010/08/24/c500k-in-action-at-urban-airship/
>     >
>     > Table 1: Connections Handled Before Failure
>     >
>     > Implementation        Connections     Memory Used
>     > Java Pure NIO 512,000 +       2.5 GB
>     > Java w/Netty  330,000         2.2 GB
>     > Scala w/Netty 173,000         1.5 GB
>     >
>     >
>     > Table 2: Memory Efficiency per Connection
>     >
>     > Implementation        Connections     Memory Used     Delta
>     > Java Pure NIO 80,000 +        581 MB  1x
>     > Java w/Netty  80,000          711 MB  1.3x
>     > Scala w/Netty 80,000          937 MB  2.26x
>     >
>     >
> 
>     --
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>     http://gleamynode.net/
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-- 
Trustin Lee - http://gleamynode.net/


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