Re: jsonb format is pessimal for toast compression

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Stephen Frost <sfrost(at)snowman(dot)net>
Cc: Bruce Momjian <bruce(at)momjian(dot)us>, Andres Freund <andres(at)2ndquadrant(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Peter Geoghegan <pg(at)heroku(dot)com>, Claudio Freire <klaussfreire(at)gmail(dot)com>, "David E(dot) Wheeler" <david(at)justatheory(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Jan Wieck <jan(at)wi3ck(dot)info>
Subject: Re: jsonb format is pessimal for toast compression
Date: 2014-09-29 18:00:21
Message-ID: 7590.1412013621@sss.pgh.pa.us
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Stephen Frost <sfrost(at)snowman(dot)net> writes:
> * Tom Lane (tgl(at)sss(dot)pgh(dot)pa(dot)us) wrote:
>> Done --- 201409291 is the cutover point.

> Just to clarify- the commit bumped the catversion to 201409292, so
> version <= 201409291 has the old format while version > 201409291 has
> the new format. There was no 201409291, so I suppose it doesn't matter
> too much, but technically 'version >= 201409291' wouldn't be accurate.

Nope. See my response to Andrew: ...1 is the cutover commit Bruce
should use, because that's what it is in 9.4.

regards, tom lane

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