From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS4713 221.184.0.0/13 X-Spam-Status: No, score=-3.6 required=3.0 tests=AWL,BAYES_00, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.0 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 96A701F404 for ; Sun, 29 Apr 2018 08:22:08 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id B3072120915; Sun, 29 Apr 2018 17:22:04 +0900 (JST) Received: from o1678916x28.outbound-mail.sendgrid.net (o1678916x28.outbound-mail.sendgrid.net [167.89.16.28]) by neon.ruby-lang.org (Postfix) with ESMTPS id C5ED8120910 for ; Sun, 29 Apr 2018 17:22:01 +0900 (JST) Received: by filter0025p3iad2.sendgrid.net with SMTP id filter0025p3iad2-31075-5AE580A4-1B 2018-04-29 08:21:57.012367285 +0000 UTC Received: from herokuapp.com (ec2-54-211-186-217.compute-1.amazonaws.com [54.211.186.217]) by ismtpd0044p1mdw1.sendgrid.net (SG) with ESMTP id jGCqK9zRSz-VWnombV-t_Q Sun, 29 Apr 2018 08:21:56.881 +0000 (UTC) Date: Sun, 29 Apr 2018 08:21:58 +0000 (UTC) From: shyouhei@ruby-lang.org To: ruby-core@ruby-lang.org Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 62106 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 14718 X-Redmine-Issue-Author: mperham X-Redmine-Sender: shyouhei 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/Ymy4QrNMhiuLXJG8OTL2vJD1yS7kSlhv91WagCp821dKi3dY2020hVqYBY64Hv FYODN2ZsfA7OkG88BWCq7lb5ZIwk9qF1pAAaxPD/nK3b5N+U2lB03CFo+huUJ0uea3lD45Wbz9ERqy oQ6FGBBgV/GCdaI9J7sxNW1J5s4FzVio2l/W++kGkCbN5sZ+Oc2h6zQKCQ== X-ML-Name: ruby-core X-Mail-Count: 86760 Subject: [ruby-core:86760] [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 shyouhei (Shyouhei Urabe). mperham (Mike Perham) wrote: > Since MRI offers --with-jemalloc, I assume it is safe That's not the reason for it being safe. > Are you mainly concerned with native C extensions that call `strdup`? You can have trouble without any C extensions. See also https://bugs.ruby-lang.org/issues/13524 (which is not glibc versus jemalloc, but the situation is the same). ---------------------------------------- Feature #14718: Use jemalloc by default? https://bugs.ruby-lang.org/issues/14718#change-71713 * 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. -- https://bugs.ruby-lang.org/