[Openstack-operators] memcached redundancy

Pete Zaitcev zaitcev at redhat.com
Tue Sep 2 22:34:13 UTC 2014

On Thu, 14 Aug 2014 10:09:59 -0600
Joe Topjian <joe at topjian.net> wrote:

> But if I take a server down for maintenance, I notice a 2-3 second delay in
> all requests. I've confirmed it's memcached by editing the list of
> memcached servers in the config files and the delay goes away.

This is odd. When memcached is down, TCP connection to it fails
immediately as the RST packet is transmitted. Make sure you don't
firewall the TCP RSTs unnecessarily.

-- Pete

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