Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1aC4M9-0004Ep-9Z for pgsql-hackers@arkaria.postgresql.org; Thu, 24 Dec 2015 11:46:53 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.84) (envelope-from ) id 1aC4M8-0002f6-QV for pgsql-hackers@arkaria.postgresql.org; Thu, 24 Dec 2015 11:46:52 +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) (envelope-from ) id 1aC4Ko-000156-5Y for pgsql-hackers@postgresql.org; Thu, 24 Dec 2015 11:45:30 +0000 Received: from newmail.postgrespro.ru ([93.174.131.138] helo=mail.postgrespro.ru) by magus.postgresql.org with esmtp (Exim 4.84) (envelope-from ) id 1aC4Kl-0003Sj-5N for pgsql-hackers@postgresql.org; Thu, 24 Dec 2015 11:45:29 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.postgrespro.ru (Postfix) with ESMTP id E2B0C21C52A2; Thu, 24 Dec 2015 14:45:25 +0300 (MSK) Received: from mail.postgrespro.ru ([127.0.0.1]) by localhost (mail.postgrespro.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vfs0O9pWQ7b2; Thu, 24 Dec 2015 14:45:25 +0300 (MSK) Received: from fujitsu (unknown [192.168.27.1]) by mail.postgrespro.ru (Postfix) with ESMTPSA id 1890D21C5233; Thu, 24 Dec 2015 14:45:25 +0300 (MSK) Date: Thu, 24 Dec 2015 14:43:37 +0300 From: Aleksander Alekseev To: Tomas Vondra Cc: pgsql-hackers@postgresql.org Subject: Re: WIP: bloom filter in Hash Joins with batches Message-ID: <20151224144337.0e92d8f4@fujitsu> In-Reply-To: <5670946E.8070705@2ndquadrant.com> References: <5670946E.8070705@2ndquadrant.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII 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 Hello, Tomas. Great idea! Did you consider to cache bloom filter or at least part(s) of it somehow? I think this way we could gain some more TPS. This of course assuming that creating a bloom filter is really a bottleneck here, which would be nice be investigated first. Best regards, Aleksander -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers