Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ePb6J-0003X8-Ql for pgsql-hackers@arkaria.postgresql.org; Thu, 14 Dec 2017 21:31:31 +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 1ePb6J-0001hN-CM for pgsql-hackers@arkaria.postgresql.org; Thu, 14 Dec 2017 21:31:31 +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 1ePb6J-0001hD-2d for pgsql-hackers@lists.postgresql.org; Thu, 14 Dec 2017 21:31:31 +0000 Received: from smtprelay0060.b.hostedemail.com ([64.98.42.60] helo=smtprelay.b.hostedemail.com) by makus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.89) (envelope-from ) id 1ePb6G-00065C-7D for pgsql-hackers@postgresql.org; Thu, 14 Dec 2017 21:31:29 +0000 Received: from filter.hostedemail.com (10.5.19.248.rfc1918.com [10.5.19.248]) by smtprelay03.b.hostedemail.com (Postfix) with ESMTP id B8A981A73BE; Thu, 14 Dec 2017 21:31:21 +0000 (UTC) X-Session-Marker: 616C76686572726540616C76682E6E6F2D69702E6F7267 X-Spam-Summary: 50,0,0,,d41d8cd98f00b204,alvherre@alvh.no-ip.org,:::::::::::::,RULES_HIT:41:355:379:599:967:968:973:988:989:1260:1277:1311:1312:1313:1314:1345:1359:1437:1515:1516:1518:1519:1534:1537:1566:1593:1594:1595:1596:1711:1714:1730:1747:1777:1792:2393:2525:2560:2563:2682:2685:2693:2828:2859:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3870:3871:3872:3873:3874:3876:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4605:5007:6261:9025:9121:10004:10400:10848:11232:11658:11914:13069:13311:13357:13439:13894:13895:14764:14915:21080:21627:30054,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:4,LUA_SUMMARY:none X-HE-Tag: war64_bb2da7b1895d X-Filterd-Recvd-Size: 1482 Received: from alvin.alvh.no-ip.org (unknown [200.27.176.110]) (Authenticated sender: alvherre@alvh.no-ip.org) by omf06.b.hostedemail.com (Postfix) with ESMTPA; Thu, 14 Dec 2017 21:31:20 +0000 (UTC) Received: by alvin.alvh.no-ip.org (Postfix, from userid 1000) id B2EA6FC2; Thu, 14 Dec 2017 18:15:53 -0300 (-03) Date: Thu, 14 Dec 2017 18:15:53 -0300 From: Alvaro Herrera To: Konstantin Knizhnik Cc: Simon Riggs , Michael Paquier , Christoph Berg , Thomas Munro , Peter Eisentraut , PostgreSQL Hackers Subject: Re: [HACKERS] Surjective functional indexes Message-ID: <20171214211553.ijxfd4p52nz7qg44@alvherre.pgsql> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: NeoMutt/20170306-137-4415bd-dirty (1.8.0) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk Konstantin Knizhnik wrote: > If you still thing that additional 16 bytes per relation in statistic is too > high overhead, then I will also remove autotune. I think it's pretty clear that these additional bytes are excessive. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services