Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 8218D18D7F for ; Wed, 16 Dec 2015 21:48:47 +0000 (UTC) Received: (qmail 39588 invoked by uid 500); 16 Dec 2015 21:48:47 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 39529 invoked by uid 500); 16 Dec 2015 21:48:47 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 39489 invoked by uid 99); 16 Dec 2015 21:48:47 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 16 Dec 2015 21:48:47 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id BBBFE2C1F73 for ; Wed, 16 Dec 2015 21:48:46 +0000 (UTC) Date: Wed, 16 Dec 2015 21:48:46 +0000 (UTC) From: "Elliott Clark (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HBASE-14978) Don't allow Multi to retain too many blocks MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HBASE-14978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15060947#comment-15060947 ] Elliott Clark commented on HBASE-14978: --------------------------------------- That test passes 5 out of 5 times on this branch for me. Since there's nothing here that would change the SplitLogManager, and the apache build env is less than useless, I'll rebase and ignore that test. > Don't allow Multi to retain too many blocks > ------------------------------------------- > > Key: HBASE-14978 > URL: https://issues.apache.org/jira/browse/HBASE-14978 > Project: HBase > Issue Type: Improvement > Affects Versions: 2.0.0, 1.2.0, 1.3.0 > Reporter: Elliott Clark > Assignee: Elliott Clark > Priority: Critical > Attachments: HBASE-14978-v1.patch, HBASE-14978-v2.patch, HBASE-14978-v3.patch, HBASE-14978-v4.patch, HBASE-14978.patch > > > Scans and Multi's have limits on the total size of cells that can be returned. However if those requests are not all pointing at the same blocks then the KeyValues can keep alive a lot more data than their size. > Take the following example: > A multi with a list of 10000 gets to a fat row. Each column being returned in in a different block. Each column is small 32 bytes or so. > So the total cell size will be 32 * 10000 = ~320kb. However if each block is 128k then total retained heap size will be almost 2gigs. -- This message was sent by Atlassian JIRA (v6.3.4#6332)