Re: Optimize LISTEN/NOTIFY

Joel Jacobson <joel@compiler.org>

From: "Joel Jacobson" <joel@compiler.org>

To: "Tom Lane" <tgl@sss.pgh.pa.us>

Cc: pgsql-hackers <pgsql-hackers@postgresql.org>

Date: 2025-10-06T20:22:05Z

Lists: pgsql-hackers

Commits

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

Optimize LISTEN/NOTIFY via shared channel map and direct advancement.
- 282b1cde9ded 19 (unreleased) landed
Fix incorrect logic for caching ResultRelInfos for triggers
- 39dcfda2d23a 19 (unreleased) cited

Attachments

optimize_listen_notify-v8.patch (application/octet-stream) patch v8

On Mon, Oct 6, 2025, at 22:11, Joel Jacobson wrote:
> The patch is now using dshash. I've been looking at code in launcher.c
> when implementing it. The function init_channel_hash() ended up being
> very similar to launcher.c's logicalrep_launcher_attach_dshmem().

Noticed a mistake on one line just after pressing send.
Sorry about that, new version attached.

/Joel