netdev - Re: [PATCH] socket: increase default maximum listen queue length

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Date:	Sat, 19 Mar 2011 21:41:00 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	hagen@...u.net
Cc:	netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH] socket: increase default maximum listen queue length

From: Hagen Paul Pfeifer <hagen@...u.net>
Date: Sun, 20 Mar 2011 02:50:11 +0100

> For real server work the defacto sysctl_somaxconn limit seems inadequate:
> 
>     Experiments with real servers show, that it is absolutely not enough
>     even at 100conn/sec. 256 cures most of problems.

What in the world is a server running on multi-GHZ cpus doing such
that it cannot accept() fast enough to keep up with a 100 connections
per second?

We were handling that just fine 10+ years ago.

The math simply doesn't add up.

Either your numbers are wrong or the server design is brain-dead.
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