Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1aOl6F-0007vH-P9 for pgsql-novice@arkaria.postgresql.org; Thu, 28 Jan 2016 11:50:55 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.84) (envelope-from ) id 1aOl6F-0000iz-C1 for pgsql-novice@arkaria.postgresql.org; Thu, 28 Jan 2016 11:50:55 +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 1aOl5P-0007ni-2G for pgsql-novice@postgresql.org; Thu, 28 Jan 2016 11:50:03 +0000 Received: from mout.kundenserver.de ([217.72.192.73]) by magus.postgresql.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.84) (envelope-from ) id 1aOl5L-0005N9-Gi for pgsql-novice@postgresql.org; Thu, 28 Jan 2016 11:50:02 +0000 Received: from [192.168.178.26] ([84.165.207.195]) by mrelayeu.kundenserver.de (mreue103) with ESMTPSA (Nemesis) id 0LdL6H-1ZhD3U0BQf-00iRsM for ; Thu, 28 Jan 2016 12:49:57 +0100 Subject: Sequence of processing: WAL / shared buffers To: pgsql-novice@postgresql.org References: <20160105193334.GA296052@alvherre.pgsql> <5690218B.9060103@purtz.de> From: =?UTF-8?Q?J=c3=bcrgen_Purtz?= Message-ID: <56AA0064.1010807@purtz.de> Date: Thu, 28 Jan 2016 12:49:56 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 In-Reply-To: <5690218B.9060103@purtz.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K0:sBH1WwDUIDG9CkR0Cz0Kh5jj/He6zpI+AqsBeVYqhiDQKQ+LJtX Lxa/2/0FqnCuz2ArPwtoze0fYRhg2Ntz6tIp2teK9lR4do+llmwkaC8+n1vLLoM8CnEDWVh Bm7OnMqV6KIAxOMZb4C4rXGTyUjLwJ3+nSZl7gM5yYnuSaal/dtPD54B4l/DLM9uTv8yBgm gU9ohfYi9Y7ee2aqlwMzQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:UVWgZE46WjY=:ePNUxV3U+Mx97yP8+N7ttp QqtYEwQPNBQIFxBDcbe6TfY7gaJcGQSqLvv0NC926Kpnc6FWaMaUCvfsS2ljQFxKKxQnQqnCw rBJ3J9DmUXF28zgpXucEm0b3yRPVX1y27bD8VRHio51AJlS6RopTfenQZIVRscBAFLjCFp5Th xedLyQn5RTH+hmO/ZXitCHay7MeNzY1jcnu3jZo7UrIM+rVu/iNaNNFKLrVQ4FXfqE6CZ9WLM neQaUkmTGCobKrDk8mK1QVXjLwcSRm8HB5QM+snMMhN0kpKEFRCrXWvbpGMcF6tkxnWZAvi4p t8ADpZpySYEO7IuXUaocT6W9907QC9MQY+ypOmKSHyxWlMS8kliV+6ay2Ahwke83phtYMcJLy nbJfOerRKnu2iIYbUfCbUf4T8SrX0CUiiLRAIhdo9PqMmz0uqu3UDJf+HsknkjLsXTx8+nvZX HpWIOYZJy0o9kiQstNM/Lqyp1RxsyTNbt1wb/xKXno/UcsRTS29jjxU8WCVCFMeHUDlmHPcOX U5WPKwFjakA9O4+3aSmRFXKlBCc2c7sP0OuAGK+bDD8wrQY2J+rotRFtdd2URHDtwoLVIctgA 4zhPvUU0o3/c4WYKSpvuj4WRd7W9p0uFzkKfRf8aVjHOPrFUOuo95RTBEjEiQTgaS6E+fMgvU 2PtHNV81loMpG3h+D1kC7ODkeTWrVplQ+otmY1LGQ67pt+ZlghrG37T8szTT4qCK/xkYiE3wo q8wv+pTeotnIyDON/r9tI+xrpPrjdqobdDv8xQ== X-Pg-Spam-Score: -2.6 (--) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-novice Precedence: bulk Sender: pgsql-novice-owner@postgresql.org Hi, can anyone explain, what happens first during an UPDATE of an indexed column: writing and flushing to WAL or modification of shared buffers? And: both actions are finished before a confirmation is send to the requesting client - or? Regards, Jürgen Purtz -- Sent via pgsql-novice mailing list (pgsql-novice@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-novice