Date: Tue, 25 Sep 2001 14:18:19 -0700 From: Jeff Behl <jeff@expertcity.com> To: net@freebsd.org Subject: ENOBUFS and network performance tuning Message-ID: <3BB0F49B.8070704@expertcity.com>
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I have 4.3, and soon to be 4.4, boxes dedicated to a single app which basically 'bounces' traffic between two incoming TCP connections. After around 240 sessions (each session consisting of two incoming connections with traffic being passed between them), I started getting ENOBUFS errors. netstat -m showed mbuf's never peaked, so we increased kern.ipc.somaxconn from 128 -> 256. Should this help the problem? Any other guidelines to help tune a FreeBSD box for this sort of use would be greatly appreciated. Currently, the only change we make is increasing MAXUSERS to 128, though I'm not sure this is the preferred approach. Also, is there a definitive guide to what all the kernel variables (sysctl -a) are? thanks Jeff To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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