[Dovecot] Proxying Performance vs imapproxy

[Timo Sirainen]

On Mon, 2009-09-28 at 19:02 +0100, Ed W wrote:
> > Proxy servers are usually set between the webmail and the imap server.
> >
> > That's because webmails are a bitch regarding opening+closing
> > connections and so the proxy gets most of connection + auth + do
> > something + disconnect and keeps a limited pool of per user connections
> > to the imap servers that it re-uses. Proxies are usually installed on
> > the same servers that the webmail, with the webmail connecting to
> > 127.0.0.1:someport.
> >
> >   
> 
> That's what he was asking about, however, I don't think that dovecot's 
> proxy does in fact do this for you?  I believe

Right, Dovecot doesn't do connection caching.

> However, it's probably worth checking if it's an issue in your 
> installation before over tuning - I think that dovecot's login caching 
> can make this a fairly inexpensive process.

Yeah. imapproxy probably reduces the load a bit, but it probably isn't
anything dramatic with Dovecot. My guess is that it would only reduce
CPU load, but if it's at ~1% already then there's not that much point..
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