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Re: [lvs-users] DNS LVS questions

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] DNS LVS questions
From: Graeme Fowler <graeme@xxxxxxxxxxx>
Date: Wed, 26 Sep 2012 09:21:46 +0100
On Wed, 2012-09-26 at 00:16 -0700, Kelsey Cummings wrote:
> And, actually, I was looking in the wrong place.  We have persistence 
> turned off.  Sorry!

I don't believe persistence is the issue here - it's the actual UDP
timeout set using "ipvsadm --set <tcp> <tcpfin> <udp>"

If Pete's system is hitting an OOM with defaults set, something is very
wrong. In times past I ran a 3-node active-active-active load balanced
DNS system which saw query rates an order of magnitude higher than
Pete's which didn't suffer that problem.

Pete - what system is this (please give as much detail as possible -
distro, kernel, relevant sysctls and ldirectord config)? It may be that
this has to be pointed at the -devel list as you're possibly hitting a
bug.

Graeme


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