Good morning! FYI: I know many people are/were tracking this email thread rather than the newer and more recent one "scalability bottlenecks with (many) partitions (and more)", but please see [1] [2] , where Tomas committed enhanced fast-path locking to the master(18).
Thanks Tomas for persistence on this! -J. [1] - https://www.postgresql.org/message-id/E1ss4gX-000IvX-63%40gemulon.postgresql.org [2] - https://www.postgresql.org/message-id/7c1eeafb-2375-4ff6-8469-0640d52d44ed%40vondra.me
