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To: Tom Samplonius <tom@uniserve.com>
cc: Randy Terbush <randy@zyzzyva.com>, John Hay <jhay@zibbi.mikom.csir.co.za>,
        dg@root.com, freebsd-stable@FreeBSD.org
Subject: Re: Memory usage on NFS server 
In-reply-to: tom's message of Tue, 29 Apr 1997 11:52:18 -0700.
         <Pine.NEB.3.95.970429114939.11772H-100000@haven.uniserve.com> 
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Date: Tue, 29 Apr 1997 19:51:04 -0500
From: Randy Terbush <randy@zyzzyva.com>
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This behavior has been observed with Apache 1.2 throughout the 
development cycle through 1.2b10 (just released).


> On Tue, 29 Apr 1997, Randy Terbush wrote:
> 
> > 
> > For the record, I've seen the same behavior on a machine whose 
> > primary job is webservices. This is both for 2.1.7 and 2.2.1.
> > The swap will be freed by killing and restarting the webservers.
> > 
> > The machine in question has 64MB RAM and 150MB swap.
> > 
> > The webserver is Apache.
> 
>   Both inn and apache used mmap'ed memory.  When a process mmaps a shared
> file, to what process is the memory usage associated with?
> 
>   It could be what you are seeing here is a mmap() leak in these
> applications, and that mmap'ed memory is not associated with any process.
> 
>   Which version of apache?  Which version of inn?
> 
> Tom
>   
> 
> > > Do the numbers that top and ps show for per process memory usage also lie?
> > > What I see here on my news server, is that I run out of swap (256M), but
> > > according to top and ps a rough calculation of the total of all the
> > > processes is less than half that. Inn then typically show a usage of
> > > ~70M according to top, but as soon as I kill and restart it the swap usage
> > > go down to ~5M. I once even added a 128M vn swapfile and it filled that
> > > also without inn showing a usage of more than 70M, but killing and
> > > restarting it takes the swap usage down to ~5M.
> > > 
> > > John
> > > -- 
> > > John Hay -- John.Hay@mikom.csir.co.za
> > 
> > 
> > 
> >