Messages in this thread |  | | Date | Mon, 03 Feb 2003 21:19:33 -0800 (PST) | Subject | Re: problems achieving decent throughput with latency. | From | "David S. Miller" <> |
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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.
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