[Dovecot] Slow IMAP Auth

[Timo Sirainen]

On Tue, 2009-11-10 at 22:18 -0500, Jeff Duncan wrote:
> I am experiencing IMAP authentication delays when a client first authenticates, or after the last auth timeout.  There are only a handful of clients - less than 5 - using the server.  I am using a mysql database and I have verified the PAM auth is commented out.  Other than that I can't figure out what might be causing the slow authentication.  The first time a client authenticates with SSL/CRAMD5 it takes almost 20 seconds.  Does anyone have any suggestions?  My config and version is below:
..
>  passdb:
>    driver: sql
>    args: /etc/dovecot/dovecot-sql.conf
>  passdb:
>    driver: sql

Well, you have two passdb sqls.. I'm not really sure what it does when
the other one doesn't have args. It anyway isn't a good idea.

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