From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf1-f65.google.com (mail-lf1-f65.google.com [209.85.167.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by dev.tarantool.org (Postfix) with ESMTPS id 2570246970F for ; Wed, 27 Nov 2019 00:12:36 +0300 (MSK) Received: by mail-lf1-f65.google.com with SMTP id f18so15269879lfj.6 for ; Tue, 26 Nov 2019 13:12:36 -0800 (PST) Date: Wed, 27 Nov 2019 00:12:34 +0300 From: Konstantin Osipov Message-ID: <20191126211234.GF23422@atlas> References: <84ae817b52e0d9415a0b89c730792b1e0221ff24.1574510839.git.imeevma@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <84ae817b52e0d9415a0b89c730792b1e0221ff24.1574510839.git.imeevma@gmail.com> Subject: Re: [Tarantool-patches] [PATCH v4 2/2] box: introduce _vsession_settings sysview List-Id: Tarantool development patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: imeevma@tarantool.org Cc: tarantool-patches@dev.tarantool.org, v.shpilevoy@tarantool.org * imeevma@tarantool.org [19/11/23 23:10]: > This patch creates the _vsession_settings sysview. This sysview > contains names and values of the session settings. Having a session settings in a database that heavily multiplexes requests over the same connection is a bad idea: the features simply don't work together. A concurrent statement may tweak the setting while the previous statement is still in progress. Having this feature is simply a time bomb waiting to explode: sooner or later there will be a setting that makes sense to change asynchronously and that impacts in-flight transactions, and there will be no sane fix in sight. -- Konstantin Osipov, Moscow, Russia