From commits-return-216792-archive-asf-public=cust-asf.ponee.io@cassandra.apache.org Mon Nov 19 06:27:07 2018 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 9B5C5180675 for ; Mon, 19 Nov 2018 06:27:06 +0100 (CET) Received: (qmail 62797 invoked by uid 500); 19 Nov 2018 05:27:05 -0000 Mailing-List: contact commits-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@cassandra.apache.org Delivered-To: mailing list commits@cassandra.apache.org Received: (qmail 62784 invoked by uid 99); 19 Nov 2018 05:27:05 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd3-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 19 Nov 2018 05:27:05 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd3-us-west.apache.org (ASF Mail Server at spamd3-us-west.apache.org) with ESMTP id 27587180CB1 for ; Mon, 19 Nov 2018 05:27:05 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -109.501 X-Spam-Level: X-Spam-Status: No, score=-109.501 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, KAM_ASCII_DIVIDERS=0.8, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new, port 10024) with ESMTP id KmwfSBVF_Wzt for ; Mon, 19 Nov 2018 05:27:03 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTP id AEDA15FB84 for ; Mon, 19 Nov 2018 05:27:02 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id 503EFE262A for ; Mon, 19 Nov 2018 05:27:01 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 9A45921EEB for ; Mon, 19 Nov 2018 05:27:00 +0000 (UTC) Date: Mon, 19 Nov 2018 05:27:00 +0000 (UTC) From: "C. Scott Andreas (JIRA)" To: commits@cassandra.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Resolved] (CASSANDRA-11504) Slow inter-node network growth & gc issues with uptime MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/CASSANDRA-11504?page=3Dcom.atl= assian.jira.plugin.system.issuetabpanels:all-tabpanel ] C. Scott Andreas resolved CASSANDRA-11504. ------------------------------------------ Resolution: Information Provided > Slow inter-node network growth & gc issues with uptime > ------------------------------------------------------ > > Key: CASSANDRA-11504 > URL: https://issues.apache.org/jira/browse/CASSANDRA-1150= 4 > Project: Cassandra > Issue Type: Bug > Environment: Cassandra 2.1.13 & 2.2.5 > Reporter: Jeff Griffith > Priority: Major > Attachments: InterNodeTraffic.jpg > > > We are looking for help troubleshooting our production environment where = we are experiencing GC problems. After much experimentation and troubleshoo= ting with various settings, the only correlation that we can find with a sl= ow growth in GC is a slow growth in network traffic BETWEEN cassandra nodes= in our cluster. As an example, I have attached an example where in a clust= er of 24 nodes, i restarted 23 of them. Note that the outgoing rate for tha= t 24th node remains high while all others drop after the restart. Also note= that this graph is ONLY traffic between cassandra nodes. Traffic from the = clients remains FLAT throughout. Analyzing column family stats shows they a= re flat throughout. Cache hit rates are also consistent across nodes. GC is= of course its own can of worms so we are hoping this considerable increase= in traffic (more than double over the course of 6rs) between nodes explain= s it. We would greatly appreciate any ideas as to why this extra network ou= tput correlates to uptime or ideas on what to "diff" between the nodes. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org For additional commands, e-mail: commits-help@cassandra.apache.org