Re: jsonb format is pessimal for toast compression

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Peter Geoghegan <pg(at)heroku(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Robert Haas <robertmhaas(at)gmail(dot)com>, Kevin Grittner <kgrittn(at)ymail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Larry White <ljw1001(at)gmail(dot)com>
Subject: Re: jsonb format is pessimal for toast compression
Date: 2014-08-14 16:52:48
Message-ID: 20140814165248.GB7865@momjian.us
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On Thu, Aug 14, 2014 at 12:22:46PM -0400, Tom Lane wrote:
> Bruce Momjian <bruce(at)momjian(dot)us> writes:
> > Uh, can we get compression for actual documents, rather than duplicate
> > strings?
>
> [ shrug... ] What's your proposed set of "actual documents"?
> I don't think we have any corpus of JSON docs that are all large
> enough to need compression.
>
> This gets back to the problem of what test case are we going to consider
> while debating what solution to adopt.

Uh, we just one need one 12k JSON document from somewhere. Clearly this
is something we can easily get.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ Everyone has their own god. +

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