Re: Increasing listen() queue length on heavy loaded linux.

From: Bill Wichers <[email protected]>
Date: Fri, 17 Apr 1998 16:46:12 -0400 (EDT)

Could someone please fill me in on this "kernel 2.0.34"? I've now seen it
mentioned several times on this list, but I can't find it at my two usual
kernel sources (http://www.linuxhq.com and http://sunsite.unc.edu), and I
didn't even see it listed in the archives at ftp.funet.fi.

Could someone *please* tell me where to find it and what it
adds/fixes/modifys?

        -Bill

On Fri, 17 Apr 1998, Eric Stern wrote:

> Newer linux kernels (2.0.29+) don't really have this problem. They allow
> nice large backlogs now. They also allow 2 times the backlog specified by
> the program when it calls listen. Squid sets this to MaxFD / 4. So, its
> probably setting it to 64 (unless you have patched linux for greater
> filedescriptors). I'd get 2.0.34 (or 2.0.35 if its out yet).
>
> For best backlog management (and protection), compile the kernel
> with SYN and RST cookie support.
>
> Also...maybe the load is just too much for the hardware you've got.
> Consider a CPU upgrade. Incidentally, what hardware are you running it on?
>
>
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> / Eric Stern - PacketStorm Technologies - (519) 837-0824 /
> / http://www.packetstorm.on.ca /
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Received on Fri Apr 17 1998 - 13:54:14 MDT

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