Date: Wed, 29 Jan 1997 05:47:24 +0200 (EET) From: Petri Helenius <pete@sms.fi> To: dg@root.com Cc: hal@vailsys.com, hackers@freebsd.org Subject: Re: best mtu for lo0? Message-ID: <199701290347.FAA26989@silver.sms.fi> In-Reply-To: <199701281936.LAA16507@root.com> References: <199701281745.TAA25913@silver.sms.fi> <199701281936.LAA16507@root.com>
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David Greenman writes: > >Want me to comment on this (I'm not on the hackers list any longer > >though)? > > > >The above still stands true that if you set your TCPWIN < MTU you'll > >experience TCP 'deadlock' which ends up being of horrible performance. > > Pete is likely correct that window < MTU is a problem (that's obvious, > right?), but he's wrong that this is occuring in recent versions of FreeBSD. > The send/receive windows are set to 3*MTU, and for lo0 this is 49152 bytes. > When did this change? And doesn't the net.inet.tcp.recvspace and net.inet.tcp.sendspace variables have some doing in this anyway? Pete
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