MailScanner suddently taking all the CPU and a lot of memory.

Kevin Spicer kevins at BMRB.CO.UK
Mon Feb 2 23:11:10 GMT 2004

On Mon, 2004-02-02 at 22:47, Yannick Cayer wrote:

> We have about a 100 small sites configured for mail mostly and some,
> web.
> This is running on RedHat Linux 7.3 Kernel 2.4.18-27.7.xsmp
> We have been running MailScanner on that machine for almost 2 years now
> without any problems.
> Since last week, MailScanner has been bringing the server almost to a
> complete halt, loads are skyrocking very suddently to 200! It is also
> taking at that time about 25MB per MailScanner process.
> It does this for several minutes to a few hours and then suddently comes
> back.

'Since Last Week' - are you sure this isn't anything to do with the
MyDoom outbreak and its associated bounce messages (the load on my
production server doubled and it struggled to keep up at times).  If
you're not already doing so I suggest taking steps to block subjects/
email addresses used by this virus at your MTA (sendmail rulesets have
ben posted several times in the last week - search the archives for

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