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From: Konstantin Osipov <kostja.osipov@gmail.com>
To: imeevma@tarantool.org
Cc: tarantool-patches@dev.tarantool.org, v.shpilevoy@tarantool.org
Subject: Re: [Tarantool-patches] [PATCH v4 2/2] box: introduce _vsession_settings sysview
Date: Wed, 27 Nov 2019 00:12:34 +0300	[thread overview]
Message-ID: <20191126211234.GF23422@atlas> (raw)
In-Reply-To: <84ae817b52e0d9415a0b89c730792b1e0221ff24.1574510839.git.imeevma@gmail.com>

* imeevma@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

  parent reply	other threads:[~2019-11-26 21:12 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-23 12:11 [Tarantool-patches] [PATCH v4 0/2] " imeevma
2019-11-23 12:11 ` [Tarantool-patches] [PATCH v4 1/2] sysview: make get() and create_iterator() methods virtual imeevma
2019-11-23 12:12 ` [Tarantool-patches] [PATCH v4 2/2] box: introduce _vsession_settings sysview imeevma
2019-11-24 15:27   ` Vladislav Shpilevoy
2019-11-27  9:53     ` Mergen Imeev
2019-11-27 23:14       ` Vladislav Shpilevoy
2019-11-26 21:12   ` Konstantin Osipov [this message]
2019-11-27  5:15     ` Kirill Yukhin
2019-11-27 10:34       ` Konstantin Osipov
2019-11-27 10:52         ` Mergen Imeev
2019-11-27 11:05           ` Konstantin Osipov
2019-11-27 11:18             ` Mergen Imeev
2019-11-27 11:37               ` Konstantin Osipov
2019-11-27 12:12                 ` Mergen Imeev
2019-11-28  8:46 [Tarantool-patches] [PATCH v4 0/2] Introduce " imeevma
2019-11-28  8:46 ` [Tarantool-patches] [PATCH v4 2/2] box: introduce " imeevma

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