public inbox for [email protected]  

help / color / mirror / Atom feed

From: Tom Lane <[email protected]>
To: Fujii Masao <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Use SIGTERM instead of SIGUSR1 for slotsync worker to exit during promotion?
Date: Wed, 18 Mar 2026 12:23:51 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAHGQGwFzNYroAxSoyJhqTU-pH=t4Ej6RyvhVmBZ91Exj_TPMMQ@mail.gmail.com>
References: <CAHGQGwFzNYroAxSoyJhqTU-pH=t4Ej6RyvhVmBZ91Exj_TPMMQ@mail.gmail.com>

Fujii Masao <[email protected]> writes:
> I noticed that during standby promotion the startup process sends SIGUSR1 to
> the slotsync worker to make it exit. Is there a reason for using SIGUSR1?
> Would it make sense to send SIGTERM instead, so the worker can exit promptly
> even while waiting?

One consideration here is that we expect all processes to receive
SIGTERM from init at the beginning of an operating system shutdown
sequence.  Background workers should exit at that point only if their
services will not be needed during database shutdown.  While it
sounds plausible that a slotsync worker should exit immediately,
I'm not quite sure if that's what we want.

			regards, tom lane

view thread (42+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected]
  Subject: Re: Use SIGTERM instead of SIGUSR1 for slotsync worker to exit during promotion?
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox