Date: Fri, 19 Sep 2003 21:55:45 +0200 From: des@des.no (Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?=) To: Chris Pressey <cpressey@catseye.mine.nu> Cc: FreeBSD-qa@FreeBSD.org Subject: Re: Mail selection options in sysinstall(8). Message-ID: <xzpad90ft8e.fsf@dwp.des.no> In-Reply-To: <20030919121612.4a31c1ae.cpressey@catseye.mine.nu> (Chris Pressey's message of "Fri, 19 Sep 2003 12:16:12 -0700") References: <20030918152942.5c7163df.trhodes@FreeBSD.org> <3F6A2A72.90405@tenebras.com> <xzp4qz9te54.fsf@dwp.des.no> <20030919110638.5c282e06.cpressey@catseye.mine.nu> <xzpisnofxmf.fsf@dwp.des.no> <20030919121612.4a31c1ae.cpressey@catseye.mine.nu>
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Chris Pressey <cpressey@catseye.mine.nu> writes: > des@des.no (Dag-Erling Sm=F8rgrav) wrote: > > Performance under high load will be abysmal if you leave out the > > bigqueue patches, and you may also want to increase the hash size. > > [...] > That would be a nice touch. I still don't understand, though, is it a > correctness issue, or a performance issue? My server is not under high > load, and qmail sure seems to work correctly. These are just performance issues (but serious ones; under high loads, qmail performance can sometimes get so bad that it enters a death spiral where everything it does just makes the problem worse; I've experienced this in the field). There may be some correctness issues as well; DJB is not known for letting the harsh realities of life get in the way of pedantic RFC compliance. There have been problems in the past with qmail being unable to cope with non-compliant DNS servers. DES --=20 Dag-Erling Sm=F8rgrav - des@des.no
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