[erlang-questions] Problem with Rescheduling Interrupts

[Dmitry Kolesnikov]

Hello,

I see. 

I would recommend you to check NIC drivers, to enable irq throttling and additionally play around with nbr of async processes within VM.

- Dmitry

On Jan 14, 2012, at 7:46 PM, Alexander Kuleshov wrote:

> 
> 
> 2012/1/14 Dmitry Kolesnikov <dmkolesnikov@REDACTED>
> Hi,
> 
> Look like a side effect caused by NIC drivers.
> Just curious, have you done any kernel level optimisation?
> BTW, what os, NIC, kernel and erlang config we are talking about?
> 
> 
> - Dmitry
> 
> 
> On 14.1.2012, at 11.07, Max Bourinov <bourinov@REDACTED> wrote:
> 
>> Hi Erlangers,
>> 
>> I have Erlang OTP application that heavily utilizes exmpp. When I run it under the load I see very strage system behavior in munin (this is system monitoring tool).
>> 
>> The graph I see is the following: http://img829.imageshack.us/img829/259/irqstats.png
>> 
>> At the same time CPU and memory consumption grows too, but this is expected behavior. Does anybody had similar issue? What coud be the reason?
>> 
>> Best regards,
>> Max
>> 
>> 
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> 
> Hello Dmitry,
> 
> I work with Max and try to answer on your questions. We use Linux ubuntu 3.0.0-12-server  x86_64 operation system and erlang R14B02 (erts-5.8.3). Now we made only kernel tuning (http://www.metabrew.com/article/a-million-user-comet-application-with-mochiweb-part-1) .
> 
> Thank you.
> 
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