From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS15169 209.85.128.0/17 X-Spam-Status: No, score=0.0 required=3.0 tests=AWL,BAYES_00,FREEMAIL_FROM, RCVD_IN_DNSWL_LOW,UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,URIBL_DBL_ABUSE_REDIR shortcircuit=no autolearn=ham version=3.3.2 X-Original-To: unicorn-public@bogomips.org Received: from mail-ob0-f171.google.com (mail-ob0-f171.google.com [209.85.214.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 657991F49F for ; Tue, 3 Mar 2015 22:48:11 +0000 (UTC) Received: by obbgq1 with SMTP id gq1so3119892obb.2 for ; Tue, 03 Mar 2015 14:48:11 -0800 (PST) X-Received: by 10.182.133.68 with SMTP id pa4mr857880obb.87.1425422890892; Tue, 03 Mar 2015 14:48:10 -0800 (PST) MIME-Version: 1.0 Sender: brauliobo@gmail.com Received: by 10.202.87.3 with HTTP; Tue, 3 Mar 2015 14:47:30 -0800 (PST) In-Reply-To: References: From: =?UTF-8?Q?Br=C3=A1ulio_Bhavamitra?= Date: Tue, 3 Mar 2015 19:47:30 -0300 X-Google-Sender-Auth: sZYMc8OLlJGK2fba1jEdE3f7EC8 Message-ID: Subject: Re: Request Queueing after deploy + USR2 restart To: Sarkis Varozian Cc: unicorn-public Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: PublicInbox::Filter 0.0.1 List-Id: 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 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 thi= s > to happen on each deploy? > > Thanks, > > -- > *Sarkis Varozian* > svarozian@gmail.com > > > --=20 "Lute pela sua ideologia. Seja um com sua ideologia. Viva pela sua ideologia. Morra por sua ideologia" P.R. Sarkar EITA - Educa=C3=A7=C3=A3o, Informa=C3=A7=C3=A3o e Tecnologias para Autogest= =C3=A3o http://cirandas.net/brauliobo http://eita.org.br "Paramapurusha =C3=A9 meu pai e Parama Prakriti =C3=A9 minha m=C3=A3e. O un= iverso =C3=A9 meu lar e todos n=C3=B3s somos cidad=C3=A3os deste cosmo. Este universo =C3=A9 = a imagina=C3=A7=C3=A3o da Mente Macroc=C3=B3smica, e todas as entidades est=C3=A3o sendo criadas, pre= servadas e destru=C3=ADdas nas fases de extrovers=C3=A3o e introvers=C3=A3o do fluxo i= maginativo c=C3=B3smico. No =C3=A2mbito pessoal, quando uma pessoa imagina algo em sua= mente, naquele momento, essa pessoa =C3=A9 a =C3=BAnica propriet=C3=A1ria daquilo = que ela imagina, e ningu=C3=A9m mais. Quando um ser humano criado mentalmente camin= ha por um milharal tamb=C3=A9m imaginado, a pessoa imaginada n=C3=A3o =C3=A9 a= propriedade desse milharal, pois ele pertence ao indiv=C3=ADduo que o est=C3=A1 imagina= ndo. Este universo foi criado na imagina=C3=A7=C3=A3o de Brahma, a Entidade Suprema, = por isso a propriedade deste universo =C3=A9 de Brahma, e n=C3=A3o dos microcosmos q= ue tamb=C3=A9m foram criados pela imagina=C3=A7=C3=A3o de Brahma. Nenhuma propriedade dest= e mundo, mut=C3=A1vel ou imut=C3=A1vel, pertence a um indiv=C3=ADduo em particular; = tudo =C3=A9 o patrim=C3=B4nio comum de todos." Restante do texto em http://cirandas.net/brauliobo/blog/a-problematica-de-hoje-em-dia