Netscape 6 and memory usage reporting...

[mcmanus at AppliedTheory.com (Patrick McManus)]

really, those are threads. linux threads have different pids. This is 
indeed weird, but true. The major project I work with everyday is a heavily 
threaded linux server..

I also know a mozilla guy or two; trust me it is heavily threaded and 
that's just 1 27MB allocation.

-P


At 07:15 AM 6/10/2001, Jerry Feldman wrote:
>Just to elaborate a bit more. The fork() system call is implemented as
>copy-on-write, which means that the data segment is shared between the
>processes until one of the processes, stores something, then that page is
>cloned. The text segments are always shared.
>Mark Dulcey wrote:
> > linuxguy at ici.net wrote:
> > >
> > > As you can tell (having posted about Opera and now Mozilla), I'm on a 
> missi
> > on
> > > to find a functional efficient browser.
> > >
> > > I have a question. Output from 'top' reports...
> > >
> > >   445 chris     17   0 28416  27M 13320 R     0.1 17.3   0:32 mozilla-bin
> > >   447 chris      0   0 28416  27M 13320 S     0.0 17.3   0:00 mozilla-bin
> > >   448 chris      0   0 28416  27M 13320 S     0.0 17.3   0:00 mozilla-bin
> > >   449 chris      0   0 28416  27M 13320 S     0.0 17.3   0:00 mozilla-bin
> > >
> > > First of all I don't necessarily understand why Netscape 6 has 4 
> processes,
> > > but more importantly, each has exactly 27M of resident memory usage right
> > > after starting the app.  Is it possible that these are threaded and 
> actuall
> > y
> > > use the same memory space?
> >
> > It's not uncommon for applications that fork to look like this in
> > 'top'. Those 27MB are actually the same 27MB in all four copies
> > (well, almost; there are probably a few pages that have to be
> > copied). I think it's forked copies rather than threads; threads
> > don't show up separately.
> >
> > I believe that Mozilla forks a process for each new browser
> > window, to make it easier for things to happen in parallel
> > between them.
> >
> > > Netscape 4.77 has a huge memory leak in it.  Everytime my wife starts
> > > using yahoo email, netscape grows without bound ( > 200 MB).  As she
> > > types a email, I can watch the memory usage grow out of control.  It's
> > > as if NS is malloc()'ing 1MB for every character she types.  Goofy.
> > > Anyone have a similar experice with this?
> >
> > I haven't installed 4.77; I'm still using 4.76. It certainly has
> > a memory leak (it gradually gets bigger as you use it; I find I
> > need to restart it every couple of days to keep it from getting
> > too large), but I've never seen anything that bad. There may be
> > something in the content of that Yahoo mail page that triggers a
> > serious leak, and it might or might not be better in some other
> > version of Netscape.
> >
> >
> > --
> > Mark J. Dulcey               mark at buttery.org
> > Visit my house's home page:  http://www.buttery.org/
> > Visit my home page:          http://www.buttery.org/mark/
> > -
> > Subcription/unsubscription/info requests: send e-mail with
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> >
>
>--
>Jerry Feldman <gaf at blu.org>
>Boston Linux and Unix user group
>http://www.blu.org
>
>
>-
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