Re: [Exim] exim's databases and sql

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Autor: Nico Erfurth
Data:  
Para: Avleen Vig
CC: Exim-users
Asunto: Re: [Exim] exim's databases and sql
Avleen Vig wrote:

> To work around file locking contention against the filesystem-based db.
> This is a big problem on high-throughput relays.


Also SQL-Databases need to lock from time to time.

You can put the hint-database-files in a ram-disk, that will speed the
whole thing up heavily on some systems.
Also, exim_tidydb should be run from time to time, so the database stays
small.

But exim, as all MTAs, is pretty IO-bound. So if you want REAL speed,
use a battery-backed ram-drive for your spool. Or disable all sync-calls
inside of exim, if you can assure that your machine will not crash.

Nico

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Spam ist weniger ein technisches als ein soziales Problem. Die einzigen
technischen Mittel, die soziale Probleme halbwegs brauchbar loesen,
sind schwere Waffen. Und das auch nur bei wirklich konsequenter
Anwendung.                                                 -- A.
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