Re: wake up logical workers after ALTER SUBSCRIPTION
Nathan Bossart <nathandbossart@gmail.com>
From: Nathan Bossart <nathandbossart@gmail.com>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: Melih Mutlu <m.melihmutlu@gmail.com>, Thomas Munro <thomas.munro@gmail.com>, "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2023-01-06T05:40:17Z
Lists: pgsql-hackers
Attachments
I found some additional places that should remove the last-start time from the hash table. I've added those in v14. On Fri, Jan 06, 2023 at 10:30:18AM +0530, Amit Kapila wrote: > On Thu, Jan 5, 2023 at 10:49 PM Nathan Bossart <nathandbossart@gmail.com> wrote: >> On Thu, Jan 05, 2023 at 11:34:37AM +0530, Amit Kapila wrote: >> > On Thu, Jan 5, 2023 at 10:16 AM Nathan Bossart <nathandbossart@gmail.com> wrote: >> >> In v12, I moved the restart for two_phase mode to the end of >> >> process_syncing_tables_for_apply() so that we don't need to rely on another >> >> iteration of the loop. >> > >> > This should work but it is better to add a comment before calling >> > CommandCounterIncrement() to indicate that this is for making changes >> > to the relation state visible. >> >> Will do. > > Isn't it better to move this part into a separate patch as this is > useful even without the main patch to improve wakeups? І moved it to a separate patch in v14. >> > Thinking along similar lines, won't apply worker need to be notified >> > of SUBREL_STATE_SYNCWAIT state change by the tablesync worker? >> >> wait_for_worker_state_change() should notify the apply worker in this case. > > I think this is yet to be included in the patch, right? This is already present on HEAD. -- Nathan Bossart Amazon Web Services: https://aws.amazon.com
Commits
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Avoid type cheats for invalid dsa_handles and dshash_table_handles.
- 3b4ac33254e1 16.0 landed
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Track logrep apply workers' last start times to avoid useless waits.
- 5a3a95385bd5 16.0 landed
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Check for two_phase change at end of process_syncing_tables_for_apply.
- 4c032dd8046b 16.0 landed
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Wake up a subscription's replication worker processes after DDL.
- c6e1f62e2cee 16.0 landed