suppressing useless wakeups in logical/worker.c

From: Nathan Bossart <nathandbossart(at)gmail(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: suppressing useless wakeups in logical/worker.c
Date: 2022-12-02 19:55:03
Message-ID: 20221202195503.GD2277157@nathanxps13
Views: Raw Message | Whole Thread | Download mbox | Resend email
Lists: pgsql-hackers

Hi hackers,

I've attached an attempt at porting a similar change to 05a7be9 [0] to
logical/worker.c. The bulk of the patch is lifted from the walreceiver
patch, but I did need to add a hack for waking up after
wal_retrieve_retry_interval to start sync workers. This hack involves a
new wakeup variable that process_syncing_tables_for_apply() sets.

For best results, this patch should be applied on top of [1], which is an
attempt at fixing all the stuff that only runs within a reasonable
timeframe because logical worker processes currently wake up at least once
a second. With the attached patch applied, those periodic wakeups are
gone, so we need to make sure we wake up the logical workers as needed.


Nathan Bossart
Amazon Web Services:

Attachment Content-Type Size
v1-0001-suppress-unnecessary-wakeups-in-logical-worker.c.patch text/x-diff 10.2 KB


Browse pgsql-hackers by date

  From Date Subject
Next Message Pavel Stehule 2022-12-02 20:08:38 Re: Schema variables - new implementation for Postgres 15
Previous Message Nathan Bossart 2022-12-02 19:21:01 Re: wake up logical workers after ALTER SUBSCRIPTION