[Gllug] courier slow

[Ian Northeast]

countd wrote:
> Hello all
> I have an issue with courier-imap (4.1.1) on our local network. It is
> working but it's incredibly slow, even smallish text messages can take
> 5-6 seconds to show up in the mail client (Thunderbird) after clicking
> - much slower than I'd expect, and messages with small (less than 1MB)
> attachments take ages to download.
> 
> Thing is, the server isn't exactly breaking sweat (load avg 0.02 at
> one stage during testing, but the mail still slow), and the network
> traffic is fairly low (30-300 KB/s on average), so my question really
> is, what else could be causing this retardation?
> 
> Many thanks for any suggestions - am at a bit of a dead end.
> countd

Have you checked that you havn't got a duplex setting conflict between 
your server and the switch it's plugged into? It's quite common for 
Cisco switches to be set to 100Mb/s full duplex no autonegotiation, if 
you then set your end to auto it drops to half and network throughput is 
dreadful. Check it with mii-tool or ethtool.

Regards, Ian
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