[erlang-questions] Sudden death of Erlang Node

Eranga Udesh <>
Fri Jan 19 12:48:39 CET 2007


Yes, the whole node runs in One OS process. However the maximum per CPU load
didn't go beyond 25% at any time. Also this particular Erlang Node's CPU
utilization didn't exceed more than 15%.

All the above info is from Linux TOP.

Thanks,
- Eranga



-----Original Message-----
From: Fredrik Thulin [mailto:] 
Sent: Friday, January 19, 2007 12:46 PM
To: Eranga Udesh
Cc: ; 'Serge Aleynikov'
Subject: Re: [erlang-questions] Sudden death of Erlang Node

Eranga Udesh wrote:
> Thanks for the info.
> 
> I said "very busy" to indicate the system I am talking about handles over
> 1000-1500 message passing, 750-1000 process spawning, 250-500 mnesia DB
> access, 500-750 Erl Port calls, etc, Per Second (/s) kind of busyness.
> However the CPU utilization doesn't go beyond 25% in any of the 4 CPU in
the
> system and memory is over 40% free.
> 
> Based on that, even though my end problem seems similar, the cause for it
> may not be. I am running 11B-2 compiled with SMP support, but the node is
> not started in SMP mode.

I'm pretty sure that if you don't start your node in SMP mode, it will 
only use one of your processors.

Are you sure that the 25% CPU load is not really one of your four 
processors running at 100%?

/Fredrik





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