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Date:      Wed, 3 Apr 2002 19:18:07 -0600
From:      "Jacques A. Vidrine" <nectar@FreeBSD.ORG>
To:        Mike Silbersack <silby@silby.com>
Cc:        Garance A Drosihn <drosih@rpi.edu>, stable@FreeBSD.ORG
Subject:   Re: Heads up, a bit:  ephemeral port range changes
Message-ID:  <20020404011807.GC93977@madman.nectar.cc>
In-Reply-To: <20020404005838.P60053-100000@patrocles.silby.com>
References:  <p0510150db8d1539dd305@[128.113.24.47]> <20020404005838.P60053-100000@patrocles.silby.com>

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On Thu, Apr 04, 2002 at 01:07:13AM -0600, Mike Silbersack wrote:
> The ephemeral port range determines the maximum number of simultaneous
> outbound connections that you can have.  As pointed out in a PR (I don't
> recall the # offhand), our low limit was probably the reason that FreeBSD
> ran out of steam before the other OSes in the sysadmin benchmark last
> year.

This falls in the same category as any other system tuning for
questionable benchmarks.  It is certainly not a compelling reason to
break things.
 
> Normally I wouldn't change settings to tune for a benchmark, but there is
> no functional downside to this change.  As Jacques points out, many
> sysadmins with busy servers _already_ make this change, as have a few
> other OSes.

And it is a good change --- for a new operating system release.
 
> Sure it is.  After an installkernel you always have kernel.old sitting
> around.

You don't need the old kernel, anyway.  You can just use the sysctl
knobs.
 
> This isn't a big deal, guys.  Go find something better to make a fuss
> about.

Thanks for your consideration,
-- 
Jacques A. Vidrine <n@nectar.cc>                 http://www.nectar.cc/
NTT/Verio SME          .     FreeBSD UNIX     .       Heimdal Kerberos
jvidrine@verio.net     .  nectar@FreeBSD.org  .          nectar@kth.se

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