[erlang-questions] Crash while using mnesia

Gustav Simonsson <>
Fri Aug 3 13:16:24 CEST 2012


Hi Maruthavanan,

Looking at the crash dump I see the process started with 
request_processor:start_queued_items/3 is the one using
all that memory.

You have to look at what Erlang terms, and how many, are stored
in the state of that process. If you can paste the code of your
request_processor module that would be helpful. You can also look at 
http://www.erlang.org/doc/efficiency_guide/advanced.html#id68680
to see the memory size of various Erlang terms.

// Gustav

Sent from my PC

----- Original Message -----
> From: "Maruthavanan Subbarayan" <>
> To: 
> Sent: Friday, 3 August, 2012 12:35:09 PM
> Subject: Re: [erlang-questions] Crash while using mnesia
> 
> 
> 
> Hi Again,
> 
> 
> When a dump is created due to failure in allocation of memory, Is
> there a way I can check what was the memory size that was free in
> the machine from the erl_crash.dump?
> 
> Thanks,
> Marutha
> 
> 
> 
> From: 
> To: 
> Date: Thu, 2 Aug 2012 05:00:46 -0400
> Subject: [erlang-questions] Crash while using mnesia
> 
> 
> 
> 
> Hi All,
> 
> I am an application that receives series of requests and stores in
> mnesia table for processing and once that is processed it is deleted
> from the table. I have done this so that I dont miss out any
> requests. so while starting the application each time, I process the
> pending requests before I process new requests.
> 
> It seemed to be running while for couple of days and after that it
> gets crashed. I could see from crash dump that enough memory was not
> allocated. But I could not identify where the memory is being used.
> because the mnesia db directory was hardly 10K including logs.
> Attached dump is the recent one
> (http://www.sendspace.com/file/w2b2tm).
> 
> So I just included a heart while starting up so that it erlang
> restart itself. But again caused a dump stopping the application
> without restarting. I am running erlang using a pipe.
> 
> Kindly help me to identify why these two issues happen.
> 
> Thanks,
> Marutha
> 
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