Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id BAE0E200D1A for ; Mon, 9 Oct 2017 13:23:51 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id B95701609E0; Mon, 9 Oct 2017 11:23:51 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id 9B5851609BB for ; Mon, 9 Oct 2017 13:23:50 +0200 (CEST) Received: (qmail 82356 invoked by uid 500); 9 Oct 2017 11:23:49 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 82346 invoked by uid 99); 9 Oct 2017 11:23:48 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 09 Oct 2017 11:23:48 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id 1117ED5A7A for ; Mon, 9 Oct 2017 11:23:48 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 2.479 X-Spam-Level: ** X-Spam-Status: No, score=2.479 tagged_above=-999 required=6.31 tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=2, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RCVD_IN_SORBS_SPAM=0.5, SPF_PASS=-0.001] autolearn=disabled Authentication-Results: spamd1-us-west.apache.org (amavisd-new); dkim=pass (2048-bit key) header.d=instaclustr-com.20150623.gappssmtp.com Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id XNmw0yG0wz2Y for ; Mon, 9 Oct 2017 11:23:44 +0000 (UTC) Received: from mail-qt0-f169.google.com (mail-qt0-f169.google.com [209.85.216.169]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTPS id 1723560D88 for ; Mon, 9 Oct 2017 11:23:44 +0000 (UTC) Received: by mail-qt0-f169.google.com with SMTP id f15so42370193qtf.7 for ; Mon, 09 Oct 2017 04:23:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=instaclustr-com.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=s5oo0CjQxNZ5FVehjUzSZt/tdISsjv5CSe3gYsH7+uM=; b=Komg0V87uU5IM00VvIjdzEbjpPFdaqlWkW3/ciLzeUVx6Ta2u2/iA4Tv4+Dp1K/dfS ZMpQ3F6N//asd+7avmU9VB3VCTb5TbzXvx7Alp+KiJNU12eGbdYvy2gHz7Mg+PLXWsLP bkgsi+4kO/EXzm0+zDz0sjXKK4yuRhnczhh6WNR8wjHXJ49v1xgWqtSM4PiUFs7jOmRg J4xW7Xhmek94kpozDtfswTzBJ5LdgHXdBVPoIodIv5hzlNzbe9+HSNviHrVDuLVUJand 75/8rpqHdJQokK0oz/MyqAa/r91T2/xB0EpLOQhjmgli1Vud0ApbTV6jK0qHBtj5UjZS sBIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=s5oo0CjQxNZ5FVehjUzSZt/tdISsjv5CSe3gYsH7+uM=; b=iLt68kzEeVO88ZrE8LpvYYVjLEF2ROmdgnXUDKBEG5+2jMPOnraTIToi+RtfudQNlw QZEma3ARrFPSEuR4Kubu0d50hp5dNDKFVw/gx+XrAxDwH2U1yXeGYtWLQUyE3KbN8Ebf lFn0QFcdVk6dfQBoGPQff/bW5KjtFxqELjSMLyEdNGL7L38Yn4T3OhBLR5lJcrZjng+b t9OqPOc/omQ7LnCR4aQxJdlhwFgEhkJq2736kUXcovvlFwwJ13UN6HB2X8isO5nD2uIp p2S9UxgU8sc/NQMbrEpXLicicCcemNvZLCYrSYwUNOpFxNDAtjfEL57x0Pi4HCbjB7ft 5vww== X-Gm-Message-State: AMCzsaWMUdR+N9WyNq4wz5C9DcKzetgfHkbk9O/uRE9CGLCVrhTnJCJW vmTDhMSmM2qjrYLNx99HN/YVnAoSVsg9kDqV1z4WhHUJ X-Google-Smtp-Source: AOwi7QC66smndCOqXEHU+44rTYgRwOcx36c+otCgKShfRsQFICqZeWhknW7lWXC5q8dUWah51j5axTK9CxHBwjVscOM= X-Received: by 10.37.203.132 with SMTP id b126mr8087859ybg.200.1507548222844; Mon, 09 Oct 2017 04:23:42 -0700 (PDT) MIME-Version: 1.0 Received: by 10.13.242.132 with HTTP; Mon, 9 Oct 2017 04:23:02 -0700 (PDT) In-Reply-To: References: From: kurt greaves Date: Mon, 9 Oct 2017 11:23:02 +0000 Message-ID: Subject: Re: Cassandra and G1 Garbage collector stop the world event (STW) To: User Content-Type: multipart/alternative; boundary="94eb2c05bb364e0663055b1b6cd7" archived-at: Mon, 09 Oct 2017 11:23:51 -0000 --94eb2c05bb364e0663055b1b6cd7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Have you tried CMS with that sized heap? G1 is only really worthwhile with 24gb+ heap size, which wouldn't really make sense on machines with 28gb of RAM. In general CMS is found to work better for C*, leaving excess memory to be utilised by the OS page cache=E2=80=8B --94eb2c05bb364e0663055b1b6cd7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Have you tried CMS with that sized heap? G1 is only really= worthwhile with 24gb+ heap size, which wouldn't really make sense on m= achines with 28gb of RAM. In general CMS is found to work better for C*, le= aving excess memory to be utilised by the OS page cache=E2=80=8B
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