X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id 73021563E7 for ; Fri, 11 Mar 2005 19:10:36 +0000 (GMT) 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 39460-05 for ; Fri, 11 Mar 2005 19:10:28 +0000 (GMT) Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by svr1.postgresql.org (Postfix) with ESMTP id B7BFA55119 for ; Fri, 11 Mar 2005 19:10:27 +0000 (GMT) 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 j2BJARqu004476; Fri, 11 Mar 2005 14:10:27 -0500 (EST) To: "Lou O'Quin" Cc: pgsql-performance@postgresql.org Subject: Re: Query performance In-reply-to: References: Comments: In-reply-to "Lou O'Quin" message dated "Fri, 11 Mar 2005 11:47:54 -0700" Date: Fri, 11 Mar 2005 14:10:27 -0500 Message-ID: <4475.1110568227@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.007 tagged_above=0 required=5 tests=AWL X-Spam-Level: X-Archive-Number: 200503/192 X-Sequence-Number: 10897 "Lou O'Quin" writes: > it appears to actually be hypersensitive to the transport delay. The = > ratios of time for the data transport (assuming 1 for the local server) = > are: > 1 : 2.43 : 7.71 > whereas the query execution time ratios are: > 1 : 2.08 : 25.5 (!!!) How do you know that's what the data transport time is --- ie, how can you measure that separately from the total query time? regards, tom lane