X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id 3EF32D8547 for ; Tue, 30 Aug 2005 13:15:55 -0300 (ADT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 96235-10 for ; Tue, 30 Aug 2005 16:15:53 +0000 (GMT) Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id 5426AD850C for ; Tue, 30 Aug 2005 13:15:52 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.1/8.13.1) with ESMTP id j7UGFp8g022418; Tue, 30 Aug 2005 12:15:51 -0400 (EDT) To: =?ISO-8859-1?Q?R=E9my_Beaumont?= Cc: pgsql-performance@postgresql.org Subject: Re: High load and iowait but no disk access In-reply-to: References: Comments: In-reply-to =?ISO-8859-1?Q?R=E9my_Beaumont?= message dated "Mon, 29 Aug 2005 09:42:46 -0400" Date: Tue, 30 Aug 2005 12:15:51 -0400 Message-ID: <22417.1125418551@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.006 required=5 tests=[AWL=0.006] X-Spam-Level: X-Archive-Number: 200508/526 X-Sequence-Number: 14273 =?ISO-8859-1?Q?R=E9my_Beaumont?= writes: > The stats of the NetApp do confirm that it is sitting idle. Really? > CPU NFS CIFS HTTP Total Net kB/s Disk kB/s Tape kB/s > Cache Cache CP CP Disk DAFS FCP iSCSI FCP kB/s > in out read write read write > age hit time ty util in out > 2% 0 0 0 139 0 0 2788 0 0 0 > 3 96% 0% - 15% 0 139 0 3 2277 > 2% 0 0 0 144 0 0 2504 0 0 0 > 3 96% 0% - 18% 0 144 0 3 2150 > 2% 0 0 0 130 0 0 2212 0 0 0 > 3 96% 0% - 13% 0 130 0 3 1879 > 3% 0 0 0 169 0 0 2937 80 0 0 > 3 96% 0% - 13% 0 169 0 4 2718 > 2% 0 0 0 139 0 0 2448 0 0 0 > 3 96% 0% - 12% 0 139 0 3 2096 I know zip about NetApps, but doesn't the 8th column indicate pretty steady disk reads? regards, tom lane