From issues-return-332701-archive-asf-public=cust-asf.ponee.io@hbase.apache.org Tue Feb 6 16:40:09 2018 Return-Path: X-Original-To: archive-asf-public@eu.ponee.io Delivered-To: archive-asf-public@eu.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by mx-eu-01.ponee.io (Postfix) with ESMTP id BFDBC180657 for ; Tue, 6 Feb 2018 16:40:09 +0100 (CET) Received: by cust-asf.ponee.io (Postfix) id AFF52160C45; Tue, 6 Feb 2018 15:40:09 +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 05E9D160C34 for ; Tue, 6 Feb 2018 16:40:08 +0100 (CET) Received: (qmail 4652 invoked by uid 500); 6 Feb 2018 15:40:08 -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 4641 invoked by uid 99); 6 Feb 2018 15:40:08 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd4-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 06 Feb 2018 15:40:08 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd4-us-west.apache.org (ASF Mail Server at spamd4-us-west.apache.org) with ESMTP id ABA41C0042 for ; Tue, 6 Feb 2018 15:40:07 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -110.311 X-Spam-Level: X-Spam-Status: No, score=-110.311 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, 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 (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id ls6fslsxDge4 for ; Tue, 6 Feb 2018 15:40:03 +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 4070C5F183 for ; Tue, 6 Feb 2018 15:40:02 +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 84A32E0291 for ; Tue, 6 Feb 2018 15:40:01 +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 39BB9240FE for ; Tue, 6 Feb 2018 15:40:00 +0000 (UTC) Date: Tue, 6 Feb 2018 15:40:00 +0000 (UTC) From: "Gali Sheffi (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HBASE-19506) Support variable sized chunks from ChunkCreator 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-19506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Gali Sheffi updated HBASE-19506: -------------------------------- Attachment: HBASE-19506-V02.patch > Support variable sized chunks from ChunkCreator > ----------------------------------------------- > > Key: HBASE-19506 > URL: https://issues.apache.org/jira/browse/HBASE-19506 > Project: HBase > Issue Type: Sub-task > Reporter: Anastasia Braginsky > Priority: Major > Attachments: HBASE-19506-V01.patch, HBASE-19506-V02.patch > > > When CellChunkMap is created it allocates a special index chunk (or chunks) where array of cell-representations is stored. When the number of cell-representations is small, it is preferable to allocate a chunk smaller than a default value which is 2MB. > On the other hand, those "non-standard size" chunks can not be used in pool. On-demand allocations in off-heap are costly. So this JIRA is about to investigate the trade of between memory usage and the final performance. -- This message was sent by Atlassian JIRA (v7.6.3#76005)