From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS4713 221.184.0.0/13 X-Spam-Status: No, score=-4.1 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.1 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 096871F597 for ; Thu, 2 Aug 2018 00:05:03 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 05285120B74; Thu, 2 Aug 2018 09:05:00 +0900 (JST) Received: from o1678948x4.outbound-mail.sendgrid.net (o1678948x4.outbound-mail.sendgrid.net [167.89.48.4]) by neon.ruby-lang.org (Postfix) with ESMTPS id 4FFD5120B6E for ; Thu, 2 Aug 2018 09:04:58 +0900 (JST) Received: by filter0056p3mdw1.sendgrid.net with SMTP id filter0056p3mdw1-18495-5B624AA7-3 2018-08-02 00:04:55.03086697 +0000 UTC m=+611186.373521085 Received: from herokuapp.com (ec2-54-157-35-201.compute-1.amazonaws.com [54.157.35.201]) by ismtpd0004p1iad1.sendgrid.net (SG) with ESMTP id k7t6rvAdQOO6ERwYlvyeZQ Thu, 02 Aug 2018 00:04:55.009 +0000 (UTC) Date: Thu, 02 Aug 2018 00:04:55 +0000 (UTC) From: sam.saffron@gmail.com To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 63642 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 14718 X-Redmine-Issue-Author: mperham X-Redmine-Sender: sam.saffron X-Mailer: Redmine X-Redmine-Host: bugs.ruby-lang.org X-Redmine-Site: Ruby Issue Tracking System X-Auto-Response-Suppress: All Auto-Submitted: auto-generated X-SG-EID: ync6xU2WACa70kv/Ymy4QrNMhiuLXJG8OTL2vJD1yS6eCnwiAZRaYQnno+lUaJ6SKYOkrpHjVhT8dL f/APNMKCBCUvs6dmEq+2zHeGoIPts3EKf1KbKCLFDt5qva2ATzzoExVD/8ugazCFipmwh3awssl26N Q4NDDlOoTe0nPdLSRB7HFic6QsmJcUDKKe9AziiAqHM00oNh+fZ6a/HNPQ== X-ML-Name: ruby-core X-Mail-Count: 88266 Subject: [ruby-core:88266] [Ruby trunk Feature#14718] Use jemalloc by default? X-BeenThere: ruby-core@ruby-lang.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: Ruby developers List-Id: Ruby developers List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #14718 has been updated by sam.saffron (Sam Saffron). Wow awesome news @normalperson this is going to make a massive difference with Ruby 2.6! ---------------------------------------- Feature #14718: Use jemalloc by default? https://bugs.ruby-lang.org/issues/14718#change-73290 * Author: mperham (Mike Perham) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- I know Sam opened #9113 4 years ago to suggest this but I'm revisiting the topic to see if there's any movement here for Ruby 2.6 or 2.7. I supply a major piece of Ruby infrastructure (Sidekiq) and I keep hearing over and over how Ruby is terrible with memory, a huge memory hog with their Rails apps. My users switch to jemalloc and a miracle occurs: their memory usage drops massively. Some data points: https://twitter.com/brandonhilkert/status/987400365627801601 https://twitter.com/d_jones/status/989866391787335680 https://github.com/mperham/sidekiq/issues/3824#issuecomment-383072469 Redis moved to jemalloc many years ago and it solved all of their memory issues too. Their conclusion: the glibc allocator "sucks really really hard". http://oldblog.antirez.com/post/everything-about-redis-24.html This is a real pain point for the entire Rails community and would improve Ruby's reputation immensely if we can solve this problem. ---Files-------------------------------- glibc_arena_2.png (7.23 KB) jemalloc.png (21.1 KB) glibc-arena-2.log (60.3 KB) glibc.log (62.3 KB) jemalloc-3-5.log (58.5 KB) glibc.png (9.03 KB) -- https://bugs.ruby-lang.org/