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* Request Queueing after deploy + USR2 restart
@ 2015-03-03 22:24 Sarkis Varozian
  2015-03-03 22:32 ` Michael Fischer
                   ` (2 more replies)
  0 siblings, 3 replies; 20+ messages in thread
From: Sarkis Varozian @ 2015-03-03 22:24 UTC (permalink / raw)
  To: unicorn-public

We have a rails application with the following unicorn.rb:
http://goo.gl/qZ5NLn

When we deploy to the application, a USR2 signal is sent to the unicorn
master which spins up a new master and we use the before_fork in the
unicorn.rb config above to send signals to the old master as the new
workers come online.

I've been trying to debug a weird issue that manifests as "Request
Queueing" in our Newrelic APM. The graph shows what happens after a
deployment (represented by the vertical lines). Here is the graph:
http://goo.gl/iFZPMv . As you see from the graph, it is inconsistent -
there is always a latency spike - however, at times Request Queueing is
higher than previous deploys.

Any ideas on what exactly is going on here? Any suggestions on
tools/profilers to use to get to the bottom of this? Should we expect this
to happen on each deploy?

Thanks,

-- 
*Sarkis Varozian*
svarozian@gmail.com


^ permalink raw reply	[flat|nested] 20+ messages in thread

end of thread, other threads:[~2015-09-14  2:14 UTC | newest]

Thread overview: 20+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-03-03 22:24 Request Queueing after deploy + USR2 restart Sarkis Varozian
2015-03-03 22:32 ` Michael Fischer
2015-03-04 19:48   ` Sarkis Varozian
2015-03-04 19:51     ` Michael Fischer
2015-03-04 19:58       ` Sarkis Varozian
2015-03-04 20:17         ` Michael Fischer
2015-03-04 20:24           ` Sarkis Varozian
2015-03-04 20:27             ` Michael Fischer
2015-03-04 20:35             ` Eric Wong
2015-03-04 20:40               ` Sarkis Varozian
2015-03-05 17:07                 ` Sarkis Varozian
2015-03-05 17:13                   ` Bráulio Bhavamitra
2015-03-05 17:28                     ` Sarkis Varozian
2015-03-05 17:31                       ` Bráulio Bhavamitra
2015-03-05 17:32                       ` Bráulio Bhavamitra
2015-03-05 21:12                       ` Eric Wong
2015-03-03 22:47 ` Bráulio Bhavamitra
2015-03-04 19:50   ` Sarkis Varozian
     [not found] ` <CAJri6_vidE15Xor4THzQB3uxyqPdApxHoyWp47NAG8m8TQuw0Q@mail.gmail.com>
2015-09-13 15:12   ` Bráulio Bhavamitra
2015-09-14  2:14     ` Eric Wong

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