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Date:      Fri, 30 Nov 2001 10:29:28 -0800
From:      Luigi Rizzo <rizzo@aciri.org>
To:        Leo Bicknell <bicknell@ufp.org>
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: TCP Performance Graphs
Message-ID:  <20011130102928.E30981@iguana.aciri.org>
In-Reply-To: <20011130125839.A88302@ussenterprise.ufp.org>
References:  <20011130125839.A88302@ussenterprise.ufp.org>

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The default window size (controlled by the socket buffer size) can
be globally modified using sysctl variables:

	net.inet.tcp.sendspace: 16384
	net.inet.tcp.recvspace: 16384

As you mention, changing this (and other things such as the amount
of mbufs/clusters, etc.etc.) must be done considering the
hw configuration and other issues.

It is not a big deal to move the default to 32 or 64k, and I'd
vote for that, but if a sysadmin is unable to have a look at this,
then the problem is in the sysadmin, not in FreeBSD!

	cheers
	luigi
----------------------------------+-----------------------------------------
 Luigi RIZZO, luigi@iet.unipi.it  . ACIRI/ICSI (on leave from Univ. di Pisa)
 http://www.iet.unipi.it/~luigi/  . 1947 Center St, Berkeley CA 94704
 Phone: (510) 666 2927
----------------------------------+-----------------------------------------

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