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From: Sam Saffron <sam.saffron@gmail.com>
Date: Tue, 1 Nov 2016 10:08:49 +1100
Message-ID: <CAAtdryN4dbaLPZJrgdrDVkdJQXeOpmeOhpC+_u3ZpqpQcQiqJQ@mail.gmail.com>
Subject: Master wait time metric
To: unicorn-public <unicorn-public@bogomips.org>
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List-Id: <unicorn-public@bogomips.org>

Hi Eric / everyone :)

I would like to start graphing how long our master process spends
waiting for worker processes to be available.

This metric will allow us to quickly tell if a unicorn is being
overloaded and allow us to quickly remediate.

Once a minute I want to ask the master process how long it spent
waiting for child processes to become available.

How would I go about getting that metric?

Sam