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Date: Mon, 4 Aug 2014 19:34:46 +0000
From: Eric Wong <e@80x24.org>
To: Daniel Condomitti <daniel@condomitti.com>
Cc: Tony Devlin <tonydevlin@gmail.com>, unicorn-public@bogomips.org
Subject: Re: Weird Unicorn Timeout Issues (Hibernation problem?)
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Daniel Condomitti <daniel@condomitti.com> wrote:
> It could also be that your TCP keepalive interval is higher than your
> database server’s connection timeout. I’ve run into that in the past.

That kicks in at around 2 hours by default on Linux systems.
I'm not sure it would matter for Tony's case since he hit it
after ~30 minutes of idle (unless he tuned the knobs himself).

ref: tcp_keep* knobs in
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/ip-sysctl.txt

unicorn itself has no timers outside of the configurable timeout.