[erlang-questions] memory leak.

Roman <>
Fri Apr 17 14:10:00 CEST 2009


On Thu, 16 Apr 2009 16:36:55 +0500, Mihai Balea <> wrote:



I don't think, that a problem in process leak.
First restart count process: 8400, next: 13082, next 11110



>
> On Apr 16, 2009, at 2:24 AM,  wrote:
>
>> Hi dear Team,
>>
>> A problem appeared with the memory leak. Function "erlang:memory()"
>> shows
>> that "total" parameter  grows constantly and fast, during the day it
>> increases from 60 Mb till 510 Mb. "System" parameter also grows
>> constantly, not as much fast, reaching 400 Mb.
>> "process" parameter although does not reach 100 Mb. Top  FreeBSD
>> utility’s
>> "size" parameter also increases from 70 Mb till 600 Mb.
>> System crashes on "mem_error" of the module "zlib.erl" or on the error
>> "system_limit" while creating new process
>> {erlang,open_port,[{spawn,zlib_drv},[binary]]}. "yaws",
>> "error_logger" and
>> some gen_server-s work on the computer. No database except "ets" is
>> used
>> during the functioning, but the used memory doesn’t exceed 1 Mb.
>> Server
>> receives messages each second.
>> The memory releases after restarting erlang. Restarting individual
>> gen_server-s gives nothing.
>>
>> What is the reason of appearing memory leak problem?
>
> Chances are, a programming error on your part.
>
> The fact that you're getting "system_limit" errors when creating new
> processes leads me to believe that you might not have a memory leak
> per se, but a process leak.  Meaning you are dynamically creating
> processes, but don't shut them down.
>
> You can find the number of processes on your node using
>
> length(processes()).
>
> Try to see if this number increases constantly during operation.
>
> Mihai
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> 
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-- 
Best regards,
Roman Shuplov.



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