[Dovecot] dbmail benchmarking
justin at fehuq.com
Mon May 14 21:03:38 EEST 2007
Timo Sirainen wrote:
> I thought I'd try benchmarking with dbmail (v2.2.4) to see how much
> slower a SQL backend could actually be. Skip to bottom for the
> Originally I ran the tests with the databases being in XFS filesystem.
> MySQL's performance was horrible. It went 3-7x faster with ext3.
Timo, what was the hardware you used for this test?
> - In raw append speed dbmail is almost as fast as maildir.
> - In raw read/write speed maildir is about 1,6 times faster
> - When adding metadata fetches Dovecot is 4 times faster than dbmail.
> This is most likely because dbmail doesn't have a cache equivalent to
> dovecot.index.cache so it has to do the fetches the slow way.
> I would have liked to also run the generic tests with more than 1
> client, but then I start hitting dbmail bugs and the test stops
> (reported already to their bugtracker).
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