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=-1.4 required=3.0 tests=AWL,BAYES_00,FREEMAIL_FROM, RCVD_IN_DNSWL_LOW,URIBL_BLOCKED shortcircuit=no autolearn=unavailable version=3.3.2 X-Original-To: unicorn-public@bogomips.org Received: from mail-ob0-f180.google.com (mail-ob0-f180.google.com [209.85.214.180]) (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 BFD521F4B3 for ; Sun, 13 Sep 2015 15:12:54 +0000 (UTC) Received: by obbzf10 with SMTP id zf10so36651060obb.2 for ; Sun, 13 Sep 2015 08:12:54 -0700 (PDT) X-Received: by 10.60.95.233 with SMTP id dn9mr7273989oeb.6.1442157174123; Sun, 13 Sep 2015 08:12:54 -0700 (PDT) MIME-Version: 1.0 Sender: brauliobo@gmail.com Received: by 10.202.169.16 with HTTP; Sun, 13 Sep 2015 08:12:14 -0700 (PDT) In-Reply-To: References: From: =?UTF-8?Q?Br=C3=A1ulio_Bhavamitra?= Date: Sun, 13 Sep 2015 12:12:14 -0300 X-Google-Sender-Auth: 5WO1CnSpEMJKnsT2LLJTM-QSjb4 Message-ID: Subject: Re: Request Queueing after deploy + USR2 restart To: Sarkis Varozian , unicorn-public Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable List-Id: Sakis, ressurecting this. I'm seeing this after the upgrade from rails 3.2 to rails 4.2. Maybe it is because of adequate record and other "cached on first time used" stuff. cheers, br=C3=A1ulio > On Tue, Mar 3, 2015 at 7:26 PM Sarkis Varozian wrot= e: >> >> 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 th= is >> 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, preservadas e destru=C3=ADdas nas fases de extrovers=C3=A3o e introvers=C3=A3o do fluxo imaginativo 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 caminha 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 imaginando. Este universo fo= i 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 que tamb=C3=A9m foram criados pela imagina=C3=A7=C3=A3o de Brahma. Nenhuma prop= riedade deste 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