Re: primary_conninfo missing from pg_stat_wal_receiver

From: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
To: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
Cc: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Tatsuo Ishii <ishii(at)postgresql(dot)org>, Vik Fearing <vik(at)2ndquadrant(dot)fr>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: primary_conninfo missing from pg_stat_wal_receiver
Date: 2016-06-30 13:17:10
Message-ID: CAHGQGwGBtCr1_GfD4U1aSsYEq0UuzMBswW5yyGnng9wG+Q++JA@mail.gmail.com
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On Thu, Jun 30, 2016 at 10:12 PM, Michael Paquier
<michael(dot)paquier(at)gmail(dot)com> wrote:
> On Thu, Jun 30, 2016 at 9:41 PM, Alvaro Herrera
> <alvherre(at)2ndquadrant(dot)com> wrote:
>> Fujii Masao wrote:
>>> On Thu, Jun 30, 2016 at 9:30 PM, Michael Paquier
>>> <michael(dot)paquier(at)gmail(dot)com> wrote:
>>> > On Thu, Jun 30, 2016 at 8:59 PM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
>>
>>> >> ISTM that we will never be able to get out of this loop if walreceiver
>>> >> fails to connect to the master (e.g., password is wrong) after we enter
>>> >> this loop.
>>> >
>>> > Wouldn't it be cleaner to just return an error here instead of retrying?
>>>
>>> I prefer to return NULL. Now NULL is returned when walreceiver's pid is 0.
>>> We can just change this logic so that NULL is returned pid is 0 OR the
>>> flag is false.
>>
>> For the conninfo only, or for everything?
>
> All of them. If this connstr is not ready for display, the WAL
> receiver does not have a proper connection yet, so there is nothing
> worth showing anyway to the user.

+1

Regards,

--
Fujii Masao

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