> On Jun 15, 2021, at 17:30, Peter Geoghegan <pg@bowt.ie> wrote:
> It pretty much works by making the WAL sender process on the primary
> look like it holds a snapshot that's as old as the oldest snapshot on
> the replica.
>
> A replica can block VACUUM on the primary *directly* by holding a
> table-level lock, though in practice only when somebody on the replica
> acquires an AccessExclusiveLock -- which is presumably rare in
> practice.
Thank you! Attempting to track down a sudden burst of every session waiting on lock_manager LW locks, and part of that
isfinding the source of locks.
