From: "David S. Miller" <davem@redhat.com>
To: greearb@candelatech.com
Cc: john@grabjohn.com, cfriesen@nortelnetworks.com, ahu@ds9a.nl,
linux-kernel@vger.kernel.org
Subject: Re: problems achieving decent throughput with latency.
Date: Mon, 03 Feb 2003 21:19:33 -0800 (PST) [thread overview]
Message-ID: <20030203.211933.27826107.davem@redhat.com> (raw)
In-Reply-To: <3E3EAF04.9010308@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Date: Mon, 03 Feb 2003 10:03:48 -0800
Also, if it's as simple as allocating a few more buffers for tcp, maybe we
should consider defaulting to higher in the normal kernel? (I'm not suggesting
**my** numbers..)
The current values are the only "safe" defaults. Here "safe" means
that if you have thousands of web connections, clients cannot force
the serve to queue large amounts of traffic per socket.
The attack goes something like: Open N thousand connections to
server, ask for large static object, do not ACK any of the data
packets. Server must thus hold onto N thousnad * maximum socket
write buffer bytes amount of memory.
next prev parent reply other threads:[~2003-02-04 5:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-02 7:38 problems achieving decent throughput with latency Ben Greear
2003-02-02 11:48 ` bert hubert
2003-02-03 5:14 ` David S. Miller
2003-02-03 15:37 ` Chris Friesen
2003-02-03 16:11 ` John Bradford
2003-02-03 16:19 ` bert hubert
2003-02-03 18:03 ` Ben Greear
2003-02-03 19:18 ` Eric Weigle
2003-02-04 5:19 ` David S. Miller [this message]
2003-02-04 7:50 ` Ben Greear
2003-02-04 7:39 ` David S. Miller
2003-02-04 8:42 ` Ben Greear
2003-02-04 8:41 ` David S. Miller
2003-02-04 8:51 ` Ben Greear
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