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Re: McAfee impacting performance
- To: Rick Rauenzahn <rick at lanl dot gov>, cygwin at sourceware dot cygnus dot com
- Subject: Re: McAfee impacting performance
- From: Earnie Boyd <earnie_boyd at yahoo dot com>
- Date: Fri, 13 Oct 2000 10:13:28 -0700 (PDT)
--- Rick Rauenzahn <rick@lanl.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@yahoo.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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