From: Tom Lane <tgl@sss.pgh.pa.us>
To: Fujii Masao <masao.fujii@oss.nttdata.com>
Cc: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Cc: a.akenteva@postgrespro.ru
Cc: a.korotkov@postgrespro.ru
Cc: i.kartyshov@postgrespro.ru
Cc: amit.kapila16@gmail.com
Cc: pgsql-hackers@lists.postgresql.org
Subject: Re: [HACKERS] make async slave to wait for lsn to be replayed
Date: Thu, 09 Apr 2020 09:33:41 -0400
Message-ID: <27171.1586439221@sss.pgh.pa.us> (raw)
In-Reply-To: <880834ee-4b18-6d5d-9dae-6520c5eb2bef@oss.nttdata.com>
References: <20200408.100945.375702947246835193.horikyota.ntt@gmail.com>
<d3ff2e363af60b345f82396992595a03@postgrespro.ru>
<13716.1586378146@sss.pgh.pa.us>
<20200409.161107.580344062273684114.horikyota.ntt@gmail.com>
<880834ee-4b18-6d5d-9dae-6520c5eb2bef@oss.nttdata.com>
Fujii Masao <masao.fujii@oss.nttdata.com> writes:
> On 2020/04/09 16:11, Kyotaro Horiguchi wrote:
>> At Wed, 08 Apr 2020 16:35:46 -0400, Tom Lane <tgl@sss.pgh.pa.us> wrote in
>>> Why is this getting grafted onto BEGIN/START TRANSACTION in the
>>> first place?
>> The rationale for not being a fmgr function is stated in the following
>> comments. [...]
> This issue happens because the function is executed after BEGIN? If yes,
> what about executing the function (i.e., as separate transaction) before BEGIN?
> If so, the snapshot taken in the function doesn't affect the subsequent
> transaction whatever its isolation level is.
I wonder whether making it a procedure, rather than a plain function,
would help any.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, masao.fujii@oss.nttdata.com, horikyota.ntt@gmail.com, a.akenteva@postgrespro.ru, a.korotkov@postgrespro.ru, i.kartyshov@postgrespro.ru, amit.kapila16@gmail.com, pgsql-hackers@lists.postgresql.org
Subject: Re: [HACKERS] make async slave to wait for lsn to be replayed
In-Reply-To: <27171.1586439221@sss.pgh.pa.us>
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