Horton

Re: xlog location arithmetic

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Fujii Masao <masao.fujii@gmail.com>, Magnus Hagander <magnus@hagander.net>, Euler Taveira de Oliveira <euler@timbira.com>, Pgsql Hackers <pgsql-hackers@postgresql.org>
Date: 2012-03-09T15:00:55Z
Lists: pgsql-hackers 
Robert Haas <robertmhaas@gmail.com> writes:
> On Fri, Mar 9, 2012 at 9:37 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Why would it be useful to use pg_size_pretty on xlog locations?

> The point is that it would be useful to use it on the difference
> between two xlog locations,

Um, that is exactly the claim I was questioning.  Why is that useful?

> but that is a numeric value, not int8, because of signedness issues.

See my followup --- this statement appears factually incorrect,
whatever you may feel about the usefulness issue.

			regards, tom lane