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Tracking memory usage: GC output not same order as unix top command

Hugo Ferreira
- Richard Jones
  - Richard Jones
    - Hugo Ferreira
      - Richard Jones
- Pietro Abate
  - Hugo Ferreira

Date:	-- (:)
From:	Richard Jones <rich@a...>
Subject:	Re: [Caml-list] Tracking memory usage: GC output not same order as unix top command

On Mon, Aug 30, 2010 at 11:02:52AM +0100, Richard Jones wrote:
> On Mon, Aug 30, 2010 at 10:43:42AM +0100, Hugo Ferreira wrote:
> > The output
> > shows memory usage below the 100M mark, however the unix command
> > "top" shows usage in the order of Gigabytes (at least 4.8). This
> > memory consumption grows gradually.
> 
> The output of top isn't a reliable way to measure memory usage.
> 
> Really you should be looking at /proc/<pid>/maps.  That will show you
> if, for example, the heap is becoming fragmented or if there's some
> memory leak.  There is a nice utility for examining maps files and
> system memory usage, but the name of it escapes me at the moment.

I might have been thinking of this one:

http://lwn.net/Articles/329458/

Rich.

-- 
Richard Jones
Red Hat