Re: memory usage

[Sylvain Le Gall <sylvain@le-gall.net>]

On 12-01-2009, John Lepikhin <john@ispsystem.com> wrote:
>> Starting point should be to call this periodically:
>> 
>>       Gc.compact ();
>>       let stat = Gc.stat () in
>>       let live_words = stat.Gc.live_words in
>>       eprintf "live words %d\n%!" live_words;
>> 
>> which will tell you how many words (ie 4 or 8 byte chunks) are
>> reachable according to the garbage collector.
>
> Richard, here is result (statistics was saved every 10 seconds):
>
> live words - RSS:
>
> 186980 - 12380KB <-- after first 10 seconds of work
> 154156 - 18232KB
> 153923 - 19648KB
> ...
> after 10 minutes of work:
> 203842 - 33436KB
> 170559 - 33528KB
> 187018 - 33664KB
> 71626 - 33592KB
>
> Sometimes live words drops down to 40.000. But RSS always stay near
> 30-50MB.
>

To get real memory used, (Sys.word_size * live_word / 8). Do you use
out-of-heap datastructure that can use memory ? (malloc-ed
datastructure).

Regards,
Sylvain Le Gall