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From: Michael Paquier <michael@paquier.xyz>
To: Andres Freund <andres@anarazel.de>
Cc: pgsql-hackers@lists.postgresql.org, Robert Haas <robertmhaas@gmail.com>
Cc: Jeremy Schneider <schnjere@amazon.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Cc: Albin, Lloyd P <lalbin@scharp.org>
Subject: Re: BUG #15182: Canceling authentication due to timeout aka Denial of Service Attack
Date: Tue, 24 Jul 2018 14:25:40 +0900
Message-ID: <20180724052540.GC4736@paquier.xyz> (raw)
In-Reply-To: <20180724052302.GB4736@paquier.xyz>
References: <152512087100.19803.12733865831237526317@wrigleys.postgresql.org>
	<9145334b-9583-124c-012e-7d58039ad417@amazon.com>
	<CA+TgmobgJ9b0LpwhcCdj_gMDgp9UKmR_1pfX6WpWxGGGVrOG7A@mail.gmail.com>
	<20180724041403.GF4035@paquier.xyz>
	<F4D1FB53-AAFB-4605-9336-F37A762A7738@anarazel.de>
	<20180724045010.GA4736@paquier.xyz>
	<B8A865D7-DDD0-4E04-9077-02C76B206FF5@anarazel.de>
	<20180724052302.GB4736@paquier.xyz>

On Tue, Jul 24, 2018 at 02:23:02PM +0900, Michael Paquier wrote:
> Well, letting any users take an exclusive lock on system catalogs at
> will is not acceptable either, so two possible answers would be to fail
> or skip such relations.  The first concept applies if a relation list is
> given by the user, and the second if no list is given.

The first sentence is incorrect.  That's actually "letting any users
attempt to take an exclusive lock which makes others to be stuck as
well".
--
Michael

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  Subject: Re: BUG #15182: Canceling authentication due to timeout aka Denial of Service Attack
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