MS Performance

Ken Anderson ka at PACIFIC.NET
Tue Jul 15 14:31:36 IST 2003

Tony Johansson wrote:

> On Mon, 14 Jul 2003 09:30:11 -0700, Ken Anderson <ka at PACIFIC.NET> wrote:
>>A possible bottleneck is syslog, since both sendmail & MS are very busy
>>adding log entries to the maillog, though I haven't done any testing to
>>see if this is really a problem.
> Have you tried turning off fsync on the maillogs?
>>From "Sendmail performance tuning" by Nick Christenson (highly recommended):
> "On Linux systems, by default the syslog daemon will fsync() its log files
> after each entry is written to them. On a busy email server, this operation
> can cause a measurable slowdown. In most organizations, email server logs
> aren't so critical. This behaviour can be switched off by preceding the
> appropriate entry in the /etc/syslog.conf file with "-":
> mail.* -/var/adm/mail    "

LA dropped from 2.7 to 1.3 with just that modification to syslog.conf.
Seems I should pick up that book!

Ken A.

> regards, Tony

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