| From: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [tiny doc fix] statistics are not retained across immediate shutdown |
| Date: | 2013-09-05 03:04:42 |
| Message-ID: | CAHGQGwHmhckhzhv1Yr9-+dJ9AvaWnTYFjZGVjffoNhA1Cc8goQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Sep 4, 2013 at 11:56 PM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
> On 2013-09-04 10:53:19 -0400, Tom Lane wrote:
>> "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com> writes:
>> > I propose a tiny fix to clarify this. Please find the attached patch.
>>
>> That's not an accurate description of what happens, though.
>> AFAIR, we do not throw away pg_stats files as a result of recovery.
>
> StartupXLOG() does a pgstat_reset_all() in the if (InRecovery) branch.
Yes. And this causes one problem that the statistics data would be reset
at the start after the clean shutdown of the standby server.
Regards,
--
Fujii Masao
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