Re: Reporting WAL file containing checkpoint's REDO record in pg_controldata's result

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
Cc: Magnus Hagander <magnus(at)hagander(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Reporting WAL file containing checkpoint's REDO record in pg_controldata's result
Date: 2012-03-23 16:49:38
Message-ID: CA+TgmobsM9SbrZR8yeA_2T1Kivp=CurK1Bvh9sDmAM3YW9UaaQ@mail.gmail.com
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On Fri, Mar 23, 2012 at 12:42 PM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
> On Fri, Mar 23, 2012 at 9:41 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> On Fri, Mar 23, 2012 at 6:13 AM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
>>> On Fri, Mar 23, 2012 at 5:56 PM, Magnus Hagander <magnus(at)hagander(dot)net> wrote:
>>>> Might it be a good idea to put it on it's own row instead of changing
>>>> the format of an existing row, in order not to break scripts and
>>>> programs that are parsing the previous output?
>>>
>>> Good idea! What row name should we use for the WAL file containing
>>> REDO record? "Latest checkpoint's REDO file"?
>>
>> Sounds good to me.  I like the idea, too.  The status quo is an
>> unnecessary nuisance, so this will be a nice usability improvement.
>
> Attached patch adds new row "Latest checkpoint's REDO WAL segment:" into
> the result of pg_controldata. I used the term "WAL segment" for the row name
> instead of "file" because "WAL segment" is used in another row "Bytes per WAL
> segment:". But better name?

s/segment/file/g?

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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