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From: Julien Rouhaud <julien.rouhaud@dalibo.com>
To: Tomas Vondra <tomas.vondra@2ndquadrant.com>
To: Teodor Sigaev <teodor@sigaev.ru>
To: Michael Paquier <michael.paquier@gmail.com>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Haribabu Kommi <kommi.haribabu@gmail.com>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Pg Hackers <pgsql-hackers@postgresql.org>
Subject: Re: Pluggable storage
Date: Sun, 25 Jun 2017 11:38:00 +0200
Message-ID: <62e28066-8063-e1f5-28dc-651adc11ca1b@dalibo.com> (raw)
In-Reply-To: <9b5728fc-c266-5f71-9a69-7668ad231e05@2ndquadrant.com>
References: <20160824182201.GA232997@alvherre.pgsql>
	<20161013202642.ksiuyx72gu6wgupf@alvherre.pgsql>
	<CAJrrPGfG7BarSFb6KQkOOYVaC6vjQRgG45+J2+TwLHHaFKuwGA@mail.gmail.com>
	<CA+TgmoYQN9xtMopr4Db3UFCqpbfd5DJb0j5apSmWtkyuWRz0Xw@mail.gmail.com>
	<CAB7nPqR6TorHQ_mXmAiB_cL40Vf2+F6hsue-P9HVGoxVxoHyKA@mail.gmail.com>
	<8b2510f0-ab89-dbf1-5b1c-5d686a5e33b8@sigaev.ru>
	<9b5728fc-c266-5f71-9a69-7668ad231e05@2ndquadrant.com>
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On 23/06/2017 16:07, Tomas Vondra wrote:
> 
> I think you're probably right - GIN does compress the posting lists by
> exploiting the TID redundancy (that it's page/offset structure), and I
> don't think there are other index AMs doing that.
> 
> But I'm not sure we can simply rely on that - it's possible people will
> try to improve other index types (e.g. by adding similar compression to
> other index types).
That reminds me
https://www.postgresql.org/message-id/55E4051B.7020209@postgrespro.ru
where Anastasia proposed something similar.

-- 
Julien Rouhaud
http://dalibo.com - http://dalibo.org


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