Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eJ54B-0003kC-Jf for pgsql-committers@arkaria.postgresql.org; Sun, 26 Nov 2017 22:06:23 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eJ54B-0004cS-2b for pgsql-committers@arkaria.postgresql.org; Sun, 26 Nov 2017 22:06:23 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1eJ54A-0004cH-UD for pgsql-committers@lists.postgresql.org; Sun, 26 Nov 2017 22:06:22 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.89) (envelope-from ) id 1eJ547-0000m0-LD for pgsql-committers@postgresql.org; Sun, 26 Nov 2017 22:06:22 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id vAQM6BlL011037; Sun, 26 Nov 2017 17:06:11 -0500 From: Tom Lane To: Simon Riggs cc: Andres Freund , Tomas Vondra , pgsql-committers Subject: Re: pgsql: Generational memory allocator In-reply-to: References: <20171123001649.y2nf7422iay6cw3v@alap3.anarazel.de> <16449.1511548313@sss.pgh.pa.us> <4618.1511573138@sss.pgh.pa.us> <6189.1511587105@sss.pgh.pa.us> <8991.1511639441@sss.pgh.pa.us> <20171125200014.qbewtip5oydqsklt@alap3.anarazel.de> <21466.1511644760@sss.pgh.pa.us> <2875.1511646362@sss.pgh.pa.us> <16797.1511718406@sss.pgh.pa.us> <28144.1511722417@sss.pgh.pa.us> <31081.1511725374@sss.pgh.pa.us> Comments: In-reply-to Simon Riggs message dated "Mon, 27 Nov 2017 08:17:47 +1100" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <11035.1511733971.1@sss.pgh.pa.us> Date: Sun, 26 Nov 2017 17:06:11 -0500 Message-ID: <11036.1511733971@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk Simon Riggs writes: > On 27 November 2017 at 06:42, Tom Lane wrote: >> Sold, will make it so. > So you will like this next patch also, since there is related code > above that stanza. Looks reasonable to me, but I wonder whether BLCKSZ is a good initial setting. Since the data length is only uint16, we're apparently assuming that the contents must be small. regards, tom lane