Zitat von Simon Wilson <si...@simonandkate.net>:
----- Message from Christian Schoepplein <c.schoeppl...@musin.de> ---------
Date: Wed, 26 Jul 2017 09:39:51 +0200
From: Christian Schoepplein <c.schoeppl...@musin.de>
Subject: Re: [imp] New IMAP server, troubleshooting slow IMP performance
To: imp@lists.horde.org
Hi Simon,
On Wed, Jul 26, 2017 at 12:07:26PM +1000, Simon Wilson wrote:
I've just moved over to a new IMAP server on my local network,
migrating IMAP
from a CentOS 5 to a CentOS 7 server in the process. Horde/apache are on a
separate server on the same network as both the old and new IMAP servers.
I'm trying to troubleshoot laggy performance in Imp since the move.
For example, refreshing the mail list in Inbox and deleting an email each
take 3 to 4 seconds before the Refresh circle stops spinning and
the list is
updated. This is longer than it was before (1 to 2 seconds typically). It
just means that overall Imp feels very slow.
Just a few ideas:
- Is your imap server respongding slow if you connect with another mail
client, for example Thunderbird?
No - feels very snappy from Mailbird.
- Are other php scripts on your webserver where imp is running also
reacting slow?
No. WordPress, which is hosted on the same server as Horde, is
performing as normal. I also have a custom PHP app running on that
box, and it's lightning fast. The Horde server is not highly loaded,
CPU usage avg < 5%.
- Are the cache settings for horde and imp the same as they were in the
old setup?
I've not changed anything on the Horde server except pointing Imp
and Ingo backends.local.php to the new IMAP server address. I also
rebooted it.
- Are the network settings, especialy routing and DNS, on the new
webserver really OK?
The web server has not changed at all, Horde and httpd are unchanged
(apart from the changed config to point to the new IMAP server),
only IMAP has moved. The server IMAP has moved to is running well -
again very low CPU, 4GB RAM. It runs postfix, cyrus-imapd,
associated mail filters, and nothing else. It's not a high traffic
mail server.
It's only Imp that appears sluggish when pointing at the new IMAP
server, yet the transactions appear to be fast from the IMAP IMP
debug log. Maybe I'm imagining it... but my seat of the pants dyno
tells me it's slower... :)
Did you try emptying the IMAP cache, assuming you have it enabled?
--
Jan Schneider
The Horde Project
https://www.horde.org/
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