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Date: Fri, 13 Oct 2000 10:13:28 -0700 (PDT)
From: Earnie Boyd <earnie_boyd AT yahoo DOT com>
Subject: Re: McAfee impacting performance
To: Rick Rauenzahn <rick AT lanl DOT gov>, cygwin AT sourceware DOT cygnus DOT com
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--- Rick Rauenzahn <rick AT lanl DOT gov> wrote:
> I see a huge performance hit with McAfee VirusScan 4.5.
> I know that the FAQ lists a problem with the .tar.gz files,
> but this occurs even when doing an 'ls' on any directory.  
> NT's task manager shows that the program mcshield.exe is
> really hogging the cpu.  I have gotten around the problem by
> disable scanning in / (which is D:\cygwin).  But I would like
> an explanation as to what is going on.  
> 

Speculation, McAfee is being warned whenever a file is stat'ed.  Cygwin must
read header info from the files to determine file type.  So McAfee will then
scan the file when touched.  I disable my autoscanner and manually scan when
needed.

> /bin/time -v ls -l /usr/bin shows a wall clock time of 50 seconds if
> Mcafee is on!  Compare that to 4.5 seconds with it disabled in D:\cygwin,
> which still seems ridiculously long, but better than 50+ seconds.
> 

I recently posted timings for my P2 Laptop.  If you're interested for
comparison see the archives.

> I would appreciate an explanation of this.  
> 
> Thanks.
> 
> cygcheck -s -v gives:
> 

Your setup looks normal.

Cheers,

=====
Earnie Boyd
mailto:earnie_boyd AT yahoo DOT com

---         <http://earniesystems.safeshopper.com>         ---
--- Cygwin: POSIX on Windows <http://gw32.freeyellow.com/> ---
---   Minimalist GNU for Windows <http://www.mingw.org/>   ---

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