Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XeppM-0003rn-3N for pgsql-performance@arkaria.postgresql.org; Thu, 16 Oct 2014 18:31:08 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1XeppK-0001ji-Uv for pgsql-performance@arkaria.postgresql.org; Thu, 16 Oct 2014 18:31:06 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1XeppK-0001jc-6I for pgsql-performance@postgresql.org; Thu, 16 Oct 2014 18:31:06 +0000 Received: from oldperseverance.encs.concordia.ca ([132.205.96.92]) by magus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XeppC-0001aZ-Dg for pgsql-performance@postgresql.org; Thu, 16 Oct 2014 18:31:05 +0000 Received: from cacao.encs.concordia.ca (emilu@cacao.encs.concordia.ca [132.205.47.225]) by oldperseverance.encs.concordia.ca (envelope-from emilu@encs.concordia.ca) (8.13.7/8.13.7) with ESMTP id s9GIUso3018983 for ; Thu, 16 Oct 2014 14:30:54 -0400 Message-ID: <54400EDE.7030801@encs.concordia.ca> Date: Thu, 16 Oct 2014 14:30:54 -0400 From: Emi Lu Reply-To: emilu@encs.concordia.ca User-Agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.8.1 MIME-Version: 1.0 To: "pgsql-performance@postgresql.org" Subject: CopyManager(In/out) vs. delete/insert directly Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.58 on oldperseverance.encs.concordia.ca at 2014-10-16 14:30:54 EDT X-Pg-Spam-Score: -1.9 (-) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-performance Precedence: bulk Sender: pgsql-performance-owner@postgresql.org Hello, Two options for data (>1M), may I know which one better please? (1) copyOut (JDBC copyManager) t1 into a.csv delete t2 where pk.cols in t1 copyIn t2 from a.csv (2) setautoCommit(false); delete t2 where pk.cols in t1; insert t2 select * from t1; Thank you Emi -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance