Date: Wed, 15 Feb 2006 09:17:43 GMT From: Juris Orlovs <jollyroger@one.lv> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/93378: Slow data transfer in Postfix and Cyrus IMAP (problem fix known) Message-ID: <200602150917.k1F9HhWJ073150@www.freebsd.org> Resent-Message-ID: <200602150920.k1F9K68K011348@freefall.freebsd.org>
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>Number: 93378
>Category: misc
>Synopsis: Slow data transfer in Postfix and Cyrus IMAP (problem fix known)
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Feb 15 09:20:03 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Juris Orlovs
>Release: 6.0
>Organization:
>Environment:
FreeBSD mx.test.lv 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Sat Jan 21 18:50:10 EET 2006 root@mx.test.lv:/usr/src/sys/i386/compile/SMP-686 i386
>Description:
There is a problem with Postfix (2.2.8; 2.3-20060112) and Cyrus IMAP (2.3.1) (installed from ports)
With Postfix on FreeBSD 6.0, transferring of messages using SMTP is slow, aproximately 7MB in 20 seconds on direct 100MBit/s link.
In Cyrus IMAP there is a issue with message writing to IMAP folders. Reading of 8MB message takes a bit less than a second, but in that time 8MB message write to IMAP folder over 100Mbit/s connection takes ~7 seconds. If writing many small messages to imap folder (~1KB in size) then average transfer rate of them is ~10 messages per second.
Hardware: (2x 3GHx Xeon, 2GB RAM, Adaptec 2410SA, 2x WD RAPTOR 74GB, 2x SEAGATE 300GB, Mainboard - Intel SE7520BD2)
For example, there is no such problems with FTP.
>How-To-Repeat:
>Fix:
"sysctl -w net.inet.tcp.delayed_ack=0" fixes mentioned problems with data transfer
>Release-Note:
>Audit-Trail:
>Unformatted:
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