Re: Compression of full-page-writes

From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Simon Riggs <simon(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Compression of full-page-writes
Date: 2014-12-12 14:34:29
Message-ID: CAB7nPqT6Cw0rbw0YaL6KcACX4YK6foY+_ZUUADrjt5+9uyHR2A@mail.gmail.com
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On Fri, Dec 12, 2014 at 11:32 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> On Fri, Dec 12, 2014 at 9:15 AM, Michael Paquier
> <michael(dot)paquier(at)gmail(dot)com> wrote:
>> I just meant that the scratch buffers used to store temporarily the
>> compressed and uncompressed data should be palloc'd all the time, even
>> if the switch is off.
>
> If they're fixed size, you can just put them on the heap as static globals.
> static char space_for_stuff[65536];
Well sure :)

> Or whatever you need.
> I don't think that's a cost worth caring about.
OK, I thought it was.
--
Michael

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