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Re: allow changing autovacuum_max_workers without restarting

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Peter Eisentraut <peter@eisentraut.org>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Andres Freund <andres@anarazel.de>, pgsql-hackers@lists.postgresql.org, "Imseih (AWS), Sami" <simseih@amazon.com>, Justin Pryzby <pryzby@telsasoft.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2025-04-29T16:43:10Z
Lists: pgsql-hackers 
On Tue, Apr 29, 2025 at 08:36:48AM +0200, Peter Eisentraut wrote:
> On 28.04.25 16:41, Nathan Bossart wrote:
>> On Mon, Apr 28, 2025 at 09:14:54AM -0400, Tom Lane wrote:
>> > My own proposal given the way it works now is to just print
>> > max_connections and not mention autovacuum_worker_slots at all.
>> > Our choice for max_connections is worth reporting, but I don't
>> > feel that everything derived from it needs to be reported.
>> 
>> I'm fine with either of these ideas.  If I had to choose one, I'd just
>> remove the autovacuum_worker_slots report for the reasons Tom noted.
> 
> Yes, removing the report is also fine by me.

Committed.

-- 
nathan

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Give up on running with NetBSD/OpenBSD's default semaphore settings.

  2. initdb: Do not report default autovacuum_worker_slots.

  3. Lower default value of autovacuum_worker_slots in initdb as needed.

  4. Allow changing autovacuum_max_workers without restarting.

  5. Reserve a PGPROC slot and semaphore for the slotsync worker process.

  6. Make archiver process an auxiliary process.

  7. Correct the formulas for System V IPC parameters SEMMNI and SEMMNS in docs.