Re: pg_reload_conf() synchronously

Hi,

On 2022-11-04 10:26:38 -0700, Gurjeet Singh wrote:
> The attached patch makes the pg_reload_conf() function set
> ConfigReloadPending to true, which will force the postgres main
> command-processing loop to process and apply config changes _before_
> executing the next command.

Worth noting that this doesn't necessarily suffice to avoid race conditions in
tests, if the test depends on *other* backends having seen the configuration
changes.

It might be worth to use the global barrier mechanism to count which backends
have reloaded configuration and to provide a function / option to pg_sleep
that waits for that.

Greetings,

Andres Freund