On Wed, Mar 2, 2022 at 10:58 AM Andres Freund <and...@anarazel.de> wrote: > On 2022-03-02 06:46:23 +1300, Thomas Munro wrote: > > From a9344bb2fb2a363bec4be526f87560cb212ca10b Mon Sep 17 00:00:00 2001 > > From: Thomas Munro <thomas.mu...@gmail.com> > > Date: Mon, 28 Feb 2022 11:27:05 +1300 > > Subject: [PATCH v2 1/3] Wake up for latches in CheckpointWriteDelay(). > > LGTM. Would be nice to have this fixed soon, even if it's just to reduce test > times :)
Thanks for the review. Pushed to master and 14, with the wait event moved to the end of the enum for the back-patch. > > From 1eb0266fed7ccb63a2430e4fbbaef2300f2aa0d0 Mon Sep 17 00:00:00 2001 > > From: Thomas Munro <thomas.mu...@gmail.com> > > Date: Tue, 1 Mar 2022 11:38:27 +1300 > > Subject: [PATCH v2 2/3] Fix waiting in RegisterSyncRequest(). > > LGTM. Pushed as far back as 12. It could be done for 10 & 11, but indeed the code starts getting quite different back there, and since there are no field reports, I think that's OK for now. A simple repro, for the record: run installcheck with shared_buffers=256kB, and then partway through, kill -STOP $checkpointer to simulate being stalled on IO for a while. Backends will soon start waiting for the checkpointer to drain the queue while dropping relations. This state was invisible to pg_stat_activity, and hangs forever if you kill the postmaster and CONT the checkpointer. > > From 50060e5a0ed66762680ddee9e30acbad905c6e98 Mon Sep 17 00:00:00 2001 > > From: Thomas Munro <thomas.mu...@gmail.com> > > Date: Tue, 1 Mar 2022 17:34:43 +1300 > > Subject: [PATCH v2 3/3] Use condition variable to wait when sync request > > queue > > is full. > [review] I'll come back to 0003 (condition variable-based improvement) a bit later.
