Return-Path: Delivered-To: apmail-hadoop-common-user-archive@www.apache.org Received: (qmail 62878 invoked from network); 1 Mar 2010 18:47:25 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 1 Mar 2010 18:47:25 -0000 Received: (qmail 34594 invoked by uid 500); 1 Mar 2010 18:47:21 -0000 Delivered-To: apmail-hadoop-common-user-archive@hadoop.apache.org Received: (qmail 34565 invoked by uid 500); 1 Mar 2010 18:47:21 -0000 Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-user@hadoop.apache.org Delivered-To: mailing list common-user@hadoop.apache.org Received: (qmail 34557 invoked by uid 99); 1 Mar 2010 18:47:21 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 01 Mar 2010 18:47:21 +0000 X-ASF-Spam-Status: No, hits=-4.0 required=10.0 tests=RCVD_IN_DNSWL_MED,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of awittenauer@linkedin.com designates 69.28.149.24 as permitted sender) Received: from [69.28.149.24] (HELO esv4-mav02.corp.linkedin.com) (69.28.149.24) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 01 Mar 2010 18:47:12 +0000 DomainKey-Signature: s=prod; d=linkedin.com; c=nofws; q=dns; h=X-IronPort-AV:Received:User-Agent:Date:Subject:From:To: Message-ID:Thread-Topic:Thread-Index:In-Reply-To: Mime-version:Content-type:Content-transfer-encoding; b=cENqPu7QeyN5FZzjAajaJ8n4vhEUE4GzZFHZUrZwym/MKJVovfNk0I1h FuZxcTKTK5LrvV1xJ9D+ule8LyrxGlTd8cs2ZfUXgHhVy3c2jJUbMM01b OEg/djG4d/bXdci; DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=linkedin.com; i=awittenauer@linkedin.com; q=dns/txt; s=proddkim; t=1267469232; x=1299005232; h=from:sender:reply-to:subject:date:message-id:to:cc: mime-version:content-transfer-encoding:content-id: content-description:resent-date:resent-from:resent-sender: resent-to:resent-cc:resent-message-id:in-reply-to: references:list-id:list-help:list-unsubscribe: list-subscribe:list-post:list-owner:list-archive; z=From:=20Allen=20Wittenauer=20 |Subject:=20Re:=20Sun=20JVM=201.6.0u18|Date:=20Mon,=2001 =20Mar=202010=2010:46:52=20-0800|Message-ID:=20|To:=20|Mime-version:=201.0 |Content-transfer-encoding:=207bit|In-Reply-To:=20; bh=+JjiQDnq432C5QA4K8uyFNyzFDbPCvKdueC8dAxeWpg=; b=A/hUvgq6crth3f/DVREndQMBGpetQbFEoOuFOn/xfKEQkJbsWIAVa/ht /7CehkMTBEgK7mT1q2dqftkslig0b+7msHgEIwlV4iGNGPNwv9mxNP6tl Bt0tkVKmVGNqrGS; X-IronPort-AV: E=Sophos;i="4.49,561,1262592000"; d="scan'208";a="11466077" Received: from 172.16.19.141 ([172.16.19.141]) by CORP-MAIL.linkedin.biz ([172.18.46.135]) via Exchange Front-End Server mail-access.linkedin.biz ([172.18.46.133]) with Microsoft Exchange Server HTTP-DAV ; Mon, 1 Mar 2010 18:46:52 +0000 User-Agent: Microsoft-Entourage/12.10.0.080409 Date: Mon, 01 Mar 2010 10:46:52 -0800 Subject: Re: Sun JVM 1.6.0u18 From: Allen Wittenauer To: Message-ID: Thread-Topic: Sun JVM 1.6.0u18 Thread-Index: Acq5b46xI/WUPDtAYUWIMYCWhFbGzw== In-Reply-To: Mime-version: 1.0 Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: 7bit On 3/1/10 7:24 AM, "Edward Capriolo" wrote: > u14 added support for the 64bit compressed memory pointers which > seemed important due to the fact that hadoop can be memory hungry. u15 > has been stable in our deployments. Not saying you should not go > newer, but I would not go older then u14. How are the compressed memory pointers working for you? I've been debating turning them on here, so real world experience would be useful from those that have taken plunge.