[Dovecot] LMTP in 2.0: concurrency, inet sockets

Stefan Foerster cite+dovecot-users at incertum.net
Sun Feb 7 15:58:09 EET 2010


* Stan Hoeppner <stan at hardwarefreak.com>:
> Stefan Foerster put forth on 2/7/2010 6:39 AM:
> > For 100k messages, delivery to a Maildir store using Postifx's pipe(8)
> > and Dovecot's deliver took 4319s, which equals 23.15 delivieries per
> > second - and that's with the pipe(8) delivery agent haning around for
> > up to 100 seconds, being reused for multiple transactions.
> > 
> > Dovecot 2.0, with LMTP, was finished after 4007s, which equals 24.96
> > deliveries per second.
> > 
> > Apart from an almost 10% difference, the system felt a lot less
> > "sluggish" (read: I/O saturated) with 2.0b2 - unfortunately, I didn't
> > run sysstat during the test, but I'll get that done next weekend.
> > 
> > Keep up the good work!
> 
> Thanks for the test info Stefan.  What are the hardware specs of the system you
> ran this test on?

KVM guest, dedicated LV using virtio, underlying single SATA disk. The
system had 1024Mb of RAM and two CPU cores (out of eight) assigned.


Stefan


More information about the dovecot mailing list