Author: Avleen Vig Date: To: Giuliano Gavazzi CC: exim-users Subject: Re: [Exim] Interesting tidbit on selecting domains from MySQL, + feature request
On Thu, Jul 03, 2003 at 09:54:54PM +0100, Giuliano Gavazzi wrote: > >Something else I just realised:
> >If the domains are specified in the config file, Exim will cache the
> >results for the next time that questions is asked, eg:
> >
> >>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> >>>> routing lists-exim@???
> >>>> silverwraith.com in "! +local_domains"? no (matched "!
> >>>>+local_domains" - cached)
> >
> >But it appears this caching isn't happening on replied given by the
> >database? If anything, this SHOULD be done, to reduce the number of
> >calls to the database, which could end up being expensive is your
> >database is slow, or across a network.
>
> phew! good that exim does not cache db results, *that* would be a bug.
I would,, respectfully, disagree :-)
I'm not talking abuot caching across multiple children, but caching
during the length of one connection, while you're trying to determine
the route of the message.
This is what I believe happens at present with local_domains specified
in the config file. I'm only suggesting we do it for database queries
also. It'll make it more consistant across the different types of
lookups, and reduce the number of database queries required.
