Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.84_2) (envelope-from ) id 1b8UcQ-00089n-Gv for pgsql-hackers@arkaria.postgresql.org; Thu, 02 Jun 2016 15:33:10 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.84_2) (envelope-from ) id 1b8UcP-0006Ok-UF for pgsql-hackers@arkaria.postgresql.org; Thu, 02 Jun 2016 15:33:09 +0000 Received: from makus.postgresql.org ([2001:4800:1501:1::229]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1b8UcP-0006Od-B7 for pgsql-hackers@postgresql.org; Thu, 02 Jun 2016 15:33:09 +0000 Received: from zmcc-5-mx.zmailcloud.com ([192.198.93.228]) by makus.postgresql.org with esmtp (Exim 4.84_2) (envelope-from ) id 1b8UcM-0003ms-So for pgsql-hackers@postgresql.org; Thu, 02 Jun 2016 15:33:08 +0000 Received: from zmcc-5-mta-1.zmailcloud.com (127.37.197.104.bc.googleusercontent.com [104.197.37.127]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by zmcc-5-mx.zmailcloud.com (Postfix) with ESMTPS id F1ABD52027A; Thu, 2 Jun 2016 11:33:05 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by zmcc-5-mta-1.zmailcloud.com (Postfix) with ESMTP id 9C6D5C2E1A; Thu, 2 Jun 2016 15:33:05 +0000 (UTC) Received: from zmcc-5-mta-1.zmailcloud.com ([127.0.0.1]) by localhost (zmcc-5-mta-1.zmailcloud.com [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id qtktJ4F50q7D; Thu, 2 Jun 2016 15:33:05 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by zmcc-5-mta-1.zmailcloud.com (Postfix) with ESMTP id EFEBFC2DFB; Thu, 2 Jun 2016 15:33:04 +0000 (UTC) X-Virus-Scanned: amavisd-new at zmcc-5-mta-1.zmailcloud.com Received: from zmcc-5-mta-1.zmailcloud.com ([127.0.0.1]) by localhost (zmcc-5-mta-1.zmailcloud.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id HpTBrrolfS8P; Thu, 2 Jun 2016 15:33:04 +0000 (UTC) Received: from redhat.com (c-98-246-109-153.hsd1.or.comcast.net [98.246.109.153]) by zmcc-5-mta-1.zmailcloud.com (Postfix) with ESMTPSA id 06ED5C2DC7; Thu, 2 Jun 2016 15:33:03 +0000 (UTC) Subject: Re: Rename max_parallel_degree? To: Robert Haas , Tom Lane References: <20160426152217.GA548975@alvherre.pgsql> <574DBEA4.9000205@agliodbs.com> <8716.1464714201@sss.pgh.pa.us> <574DC585.7010507@agliodbs.com> <574DC881.5010006@agliodbs.com> <17944.1464790245@sss.pgh.pa.us> <7570.1464816591@sss.pgh.pa.us> Cc: Amit Kapila , Peter Geoghegan , Noah Misch , David Rowley , Alvaro Herrera , Magnus Hagander , Bruce Momjian , PostgreSQL-development From: Josh berkus Message-ID: <575051AF.2090101@agliodbs.com> Date: Thu, 2 Jun 2016 08:33:03 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Pg-Spam-Score: -1.9 (-) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-hackers Precedence: bulk Sender: pgsql-hackers-owner@postgresql.org On 06/02/2016 04:58 AM, Robert Haas wrote: > Well, I think we could drop node, if you like. I think parallel > wouldn't be good to drop, though, because it sounds like we want a > global limit on parallel workers also, and that can't be just > max_workers. So I think we should keep parallel in there for all of > them, and have max_parallel_workers and > max_parallel_workers_per_gather(_node). The reloption and the Path > struct field can be parallel_workers rather than parallel_degree. So does that mean we'll rename it if you manage to implement a parameter which controls the number of workers for the whole statement? -- -- Josh Berkus Red Hat OSAS (any opinions are my own) -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers