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From: Nathan Bossart <[email protected]>
To: Melih Mutlu <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: Hayato Kuroda (Fujitsu) <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: wake up logical workers after ALTER SUBSCRIPTION
Date: Wed, 7 Dec 2022 10:11:45 -0800
Message-ID: <20221207181145.GA3698731@nathanxps13> (raw)
In-Reply-To: <CAGPVpCTkdaOyBLXB435VXq0RA1cHLFQut7BPm6t8D4dsdiEXZQ@mail.gmail.com>
References: <20221130041028.GA1604177@nathanxps13>
	<CA+hUKGJTQqnAAYAmdM9xkcs1e+5jOt34nvV622cY8cTmQcgVpA@mail.gmail.com>
	<CA+hUKGJXO6LUn3wTf3s0Z8DvgbQROxPTnJDHCsQrhbr3pF3g8Q@mail.gmail.com>
	<20221130050441.GA1677223@nathanxps13>
	<20221202002130.GA2124877@nathanxps13>
	<20221202192101.GB2277157@nathanxps13>
	<CAGPVpCTUuKyxB5f3exgDMBRTivbN5uHVkD=YfXmgznrdnwVOQw@mail.gmail.com>
	<20221206192551.GA3078082@nathanxps13>
	<20221206212954.GA3403597@nathanxps13>
	<CAGPVpCTkdaOyBLXB435VXq0RA1cHLFQut7BPm6t8D4dsdiEXZQ@mail.gmail.com>

On Wed, Dec 07, 2022 at 02:07:11PM +0300, Melih Mutlu wrote:
> Do we also need to wake up all sync workers too? Even if not, I'm not
> actually sure whether doing that would harm anything though.
> Just asking since currently the patch wakes up all workers including sync
> workers if any still exists.

After sleeping on this, I think we can do better.  IIUC we can simply check
for AllTablesyncsReady() at the end of process_syncing_tables_for_apply()
and wake up the logical replication workers (which should just consiѕt of
setting the current process's latch) if we are ready for two_phase mode.

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com


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