[imp] Re: IMP authentication and email access very slow

[Jan Schneider]

Zitat von Gavin Kelman <gavin.kelman at uk.lionbioscience.com>:

> Gavin Kelman wrote:
>> I've been running Horde 3.0.2 and IMP-h3-4.0.1 for about a week now,
>> with Apache 1.3.33 with mod_ssl against OpenSSL 0.9.7e. The IMAP
>> server is Cyrus, running on another machine. IMP worked fine for a
>> few days, everything nice and fast, no complaints.
>
> [snip]
>
> Some more information:
>
> I downloaded the latest IMP 4.0.2-RC1 and have got the same symptoms.
>
> To help diagnose the problem, I ran ethereal against the IMAP
> traffic and saw a 14 second delay from our IMAP server returning the
> list of folders. Quite why that is, I've no idea, and it doesn't
> seem to be happening any other mail client.
>
> Is there a way to enable debugging in IMP so that I can see
> _exactly_ what's going on with IMP <-> IMAP server communication?

No, because not IMP is doing the communication, but the c-client 
library compiled into PHP.

> With the Horde authentication set to use IMP as the authentication
> method, logins take about 15-30 seconds. With Horde set to use the
> IMAP server directly, logins take about 0.5 seconds. If I then go
> to IMP and login again, it take 15-30 seconds to login.

This is not *that* unusual, because there are a lot of tasks done by 
IMP on login.

> With either authentication method set, _most_ of the time, once
> logged in, selecting other folders and viewing messages is very
> fast now (I've also enabled folder caching), but 5% or so of the
> time, selecting a different mail folder takes a good 5-30 seconds
> to change.

This sounds like temporary timeouts, e.g. during DNS lookups of PGP key 
server timeouts.

Jan.

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