Re: slow IMAP connection

On Mon, 15 Mar 2010, Troy Campbell wrote:
> I recently installed the 2007e of UW IMAP and seeing high I/O wait on
> the server.

What, specifically, do you mean by "high I/O wait"?

> I have about 50 users.

That is a very small facility that even modest server hardware should
handle with aplomb.

> Mar 15 14:42:47 request1 imapd[1445]: Connection reset by peer, while reading line user=xxxxx host=f.q.d.n[11.22.33.44]

This message simply means that a client disconnected from the server
without first issuing a proper LOGOUT command, and that this was detected
while the server was reading a new IMAP command line.

The only time this message is at all interesting is if a user complains
about being disconnected from the server.  This message is evidence that,
from the server's viewpoint, the client disconnected.  This means that you
can dismiss the server as a possible cause of the problem, and look
elsewhere.  When both client and server point fingers at each other, a
common cause is an intermediate router (especially a NAT).

> Mar 15 14:42:49 request1 imapd[3250]: imap service init from 192.123.45.77
> Mar 15 14:42:49 request1 imapd[3250]: Login user=nnnn host=x.y.z [192.31.97.142]
> Mar 15 14:42:52 request1 imapd[30847]: Logout user=zzzz host=c.d.e [1.2.3.4]

None of these messages are remarkable.  They are all indications of normal
operation.

Your /etc/xinetd.d/imap file looks OK as well

> My initial build was like this:
> make lr5 SSLTYPE=none

Why are you using SSLTYPE=none?  I hope that this is strictly for in-house
use, and not exported over the Internet; as it will result in confidential
traffic (including passwords) being sent in the clear.

-- Mark --

http://panda.com/mrc
Democracy is two wolves and a sheep deciding what to eat for lunch.
Liberty is a well-armed sheep contesting the vote.
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