[erlang-questions] Debugging binary memory usage

[Patrik Nyblom]

On 10/24/2012 11:07 PM, Antonio SJ Musumeci wrote:
>
> Is there any way to find out what processes are referencing what 
> binaries? Or at least a list of binaries and their reference count 
> such as Funs in a crash dump? It seems like the dump contains 
> references to binary data ("=binary:xxxxxxx") but this is not referred 
> to in the crash dump doc.
>
Not in the crash dump, but in a living system you could do:
[erlang:process_info(P,binary) || P <- erlang:processes()].
(or something like it) Each tuple in the lists of binaries for a process 
contains the actual pointer, she size and the reference counter (in that 
order). At least it does so in current releases. The binary info tuple 
is deliberately not defined 
(http://www.erlang.org/doc/man/erlang.html#process_info-2)
>
> Thanks.
>
>
>
Cheers,
/Patrik
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