Re: pg_stat directory and pg_stat_statements

From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
To: Andres Freund <andres(at)2ndquadrant(dot)com>
Cc: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Peter Geoghegan <pg(at)heroku(dot)com>, Ashesh Vashi <ashesh(dot)vashi(at)enterprisedb(dot)com>, Tomas Vondra <tv(at)fuzzy(dot)cz>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pg_stat directory and pg_stat_statements
Date: 2014-06-02 22:22:13
Message-ID: CAB7nPqSR4+SSX3jV6RSJ0VQCRSVDT6H70ZUsxca14M4Za2htxQ@mail.gmail.com
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On Mon, Jun 2, 2014 at 11:07 PM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
> On 2014-06-02 22:59:55 +0900, Fujii Masao wrote:
>> On Thu, May 29, 2014 at 3:02 PM, Peter Geoghegan <pg(at)heroku(dot)com> wrote:
>> > On Wed, May 28, 2014 at 10:49 PM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
>> >> You're concerned about the scenario using pg_upgrade? I'm not sure the detail
>> >> of pg_upgrade. But if it doesn't work properly, we should have gotten
>> >> the trouble
>> >
>> > I'm not worried about pg_upgrade, because by design pg_stat_statements
>> > will discard stats files that originated in earlier versions. However,
>> > I don't see a need to change pg_stat_statements to serialize its
>> > statistics to disk in the pg_stat directory before we branch off 9.4.
>> > As you mentioned, it's harmless.
>>
>> Yeah, that's an idea. OTOH, there is no *strong* reason to postpone
>> the fix to 9.5. So I just feel inclined to apply the fix now...
>
> +1 for fixing it now.
+1. A beta is here for that as well.
--
Michael

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