pg.ddx.io pgsql-hackers@postgresql.org mailing list archive help / color / mirror / Atom feed From: Kartyshov Ivan <i.kartyshov@postgrespro.ru>
To: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Cc: Andy Fan <zhihuifan1213@163.com>
Cc: Alexander Korotkov <aekorotkov@gmail.com>
Cc: Euler Taveira <euler@eulerto.com>
Cc: Thomas Munro <thomas.munro@gmail.com>
Cc: Peter Eisentraut <peter@eisentraut.org>
Cc: Amit Kapila <amit.kapila16@gmail.com>
Cc: Dilip Kumar <dilipbalaut@gmail.com>
Cc: Peter Smith <smithpb2250@gmail.com>
Cc: pgsql-hackers@lists.postgresql.org
Subject: Re: [HACKERS] make async slave to wait for lsn to be replayed
Date: Tue, 02 Apr 2024 18:21:34 +0300
Message-ID: <929e86cb46190f3f42388b942dfec79a@postgrespro.ru> (raw )
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On 2024-04-02 13:15, Bharath Rupireddy wrote:
> On Tue, Apr 2, 2024 at 3:41 PM Kartyshov Ivan
> <i.kartyshov@postgrespro.ru> wrote:
>>
>> 8 years, we tried to add this feature, and now we suggest the best way
>> for this feature is to commit the minimal version first.
>
> Just curious, do you or anyone else have an immediate use for this
> function? If yes, how are they achieving read-after-write-consistency
> on streaming standbys in their application right now without a
> function like this?
Just now, application runs pg_current_wal_lsn() after update and then
waits on loop pg_current_wal_flush_lsn() until updated.
Or use slow synchronous_commit.
--
Ivan Kartyshov
Postgres Professional: www.postgrespro.com
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To: pgsql-hackers@postgresql.org
Cc: i.kartyshov@postgrespro.ru, bharath.rupireddyforpostgres@gmail.com, zhihuifan1213@163.com, aekorotkov@gmail.com, euler@eulerto.com, thomas.munro@gmail.com, peter@eisentraut.org, amit.kapila16@gmail.com, dilipbalaut@gmail.com, smithpb2250@gmail.com, pgsql-hackers@lists.postgresql.org
Subject: Re: [HACKERS] make async slave to wait for lsn to be replayed
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