On Mon, Sep 05, 2005 at 10:10:27PM +0200, Tony Earnshaw wrote:
> man, 05.09.2005 kl. 18.03 skrev Gary V:
>
> [...]
>
> > Matt found that proper indexing helped LDAP queries:
> > http://marc.theaimsgroup.com/?l=amavis-user&m=112377681617056&w=2
>
> Indexing (or not) of OpenLDAP attributes will *not* help the number of
> connections to the slapd server. It *will* help the speed at which the
> server works.
>
> Postfix's proxy_read_maps *will* help the number of connections to the
> slapd server.
If it works anything like proxying does for MySQL, then absolutely.
Proxying queries serves to amortize connection setup and
connection-related resources across many mail processes and queries.
"Proxy" is a bit misleading; while it does proxy the queries, the value
is that it's a connection cache.
I haven't used Postfix proxy_maps with LDAP, but with a MySQL
mailserver setup I did recently, it made the difference between the MTA
completely falling over under moderately high offered load, and the MTA
standing up to everything I could throw of it.
-- Clifton
--
Clifton Royston -- [EMAIL PROTECTED]
Tiki Technologies Lead Programmer/Software Architect
"My own personal theory is that this is the very dawn of the world.
We're hardly more than an eyeblink away from the fall of Troy, and
scarcely an interglaciation removed from the Altamira cave painters. We
live in extremely interesting ancient times.
I like this idea. It encourages us to be earnest and ingenious and
brave, as befits ancestral peoples; but keeps us from deciding that
because we don't know all the answers, they must be unknowable and thus
unprofitable to pursue." -- Teresa Nielsen Hayden, 1995
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