Thread

RE: POC: enable logical decoding when wal_level = 'replica' without a server restart

Hayato Kuroda (Fujitsu) <kuroda.hayato@fujitsu.com> — 2025-10-16T08:46:39Z

Dear Sawada-san,

> It's not harmful in practice. I've considered waking up the postmaster
> with a new PMSignalReason, but I thought it's overkill to introduce a
> new reason just to wake up the postmaster. If there is a convenient
> way, I'd like to use that.

It's not straightforward, but can we reuse SIGHUP signal for the purpose? This
operation actually modifies the GUC parameter wal_level. One downside is that
postmaster will propagated it to all processes, which is not required.

Best regards,
Hayato Kuroda
FUJITSU LIMITED