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From: Sarkis Varozian <svarozian@gmail.com>
To: "Bráulio Bhavamitra" <braulio@eita.org.br>
Cc: unicorn-public <unicorn-public@bogomips.org>
Subject: Re: Request Queueing after deploy + USR2 restart
Date: Wed, 4 Mar 2015 11:50:33 -0800	[thread overview]
Message-ID: <CAGchx-LZMkRX+sYLgzcKGm6CDjRVNLESPw2EH8p7YgizT_GA5A@mail.gmail.com> (raw)
In-Reply-To: <CAJri6_sqNgf+wBQuoO+acJ=H9NpxKWGHkCrozd7tvd8Xy34Jvw@mail.gmail.com>

I tried this out by just using '/' as a warmup url. It looks like it did
not do much in helping the situation. I want to believe it is because our
homepage isn't doing a "heavy" enough call to get the server warmed up.
Looking into the gist a bit further, I noticed that you are disconnecting
the db connection after warming up:
https://gist.github.com/brauliobo/11298486#file-unicorn-conf-rb-L85-L86

Does the above matter? Should I be looking to do a more db intensive
request as the "warmup" request?

2015-03-03 14:47 GMT-08:00 Bráulio Bhavamitra <braulio@eita.org.br>:

> Maybe a warm up could help the new servers?
> https://gist.github.com/brauliobo/11298486#file-unicorn-conf-rb-L77
>
> How is the CPU usage during USR2?
>
> On Tue, Mar 3, 2015 at 7:24 PM, Sarkis Varozian <svarozian@gmail.com>
> wrote:
>
>> 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
>>
>>
>>
>
>
> --
> "Lute pela sua ideologia. Seja um com sua ideologia. Viva pela sua
> ideologia. Morra por sua ideologia" P.R. Sarkar
>
> EITA - Educação, Informação e Tecnologias para Autogestão
> http://cirandas.net/brauliobo
> http://eita.org.br
>
> "Paramapurusha é meu pai e Parama Prakriti é minha mãe. O universo é meu
> lar e todos nós somos cidadãos deste cosmo. Este universo é a imaginação da
> Mente Macrocósmica, e todas as entidades estão sendo criadas, preservadas e
> destruídas nas fases de extroversão e introversão do fluxo imaginativo
> cósmico. No âmbito pessoal, quando uma pessoa imagina algo em sua mente,
> naquele momento, essa pessoa é a única proprietária daquilo que ela
> imagina, e ninguém mais. Quando um ser humano criado mentalmente caminha
> por um milharal também imaginado, a pessoa imaginada não é a propriedade
> desse milharal, pois ele pertence ao indivíduo que o está imaginando. Este
> universo foi criado na imaginação de Brahma, a Entidade Suprema, por isso
> a propriedade deste universo é de Brahma, e não dos microcosmos que também
> foram criados pela imaginação de Brahma. Nenhuma propriedade deste mundo,
> mutável ou imutável, pertence a um indivíduo em particular; tudo é o
> patrimônio comum de todos."
> Restante do texto em
> http://cirandas.net/brauliobo/blog/a-problematica-de-hoje-em-dia
>



-- 
*Sarkis Varozian*
svarozian@gmail.com


  reply	other threads:[~2015-03-04 19:50 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-03 22:24 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 [this message]
     [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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