[Dovecot] Ongoing performance issues with 2.0.x

Ralf Hildebrandt Ralf.Hildebrandt at charite.de
Fri Nov 5 16:05:05 EET 2010

* Charles Marcus <CMarcus at Media-Brokers.com>:
> Hmmm... maybe dovecot 2.0 is doing something different from 1.2 that
> causes your *live* clamdscan at delivery time to produce the heavier load...

Clamdscan is not running at delivery time on that box, it's running on
another machine. 

On my graph I labeled the NIGHTLY scan (when nobody's doing anything,
they're sleeping).
> Have you tried temporarily disabling clamd while running 2.0 and see
> what happens?

See my graph, compare left side with the right side. Do you see the

Left side: high load (dovecot 2.0, same machine, same users)
Right side: low load (dovecot 1.2, same machine, same users)
middle: completely unrelated clamdscan in the middle of the night (when nobody's doing anything, they're sleeping - thus I'm running the scan)

Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de

More information about the dovecot mailing list