Apparently, the original thread will inevitably disintegrate into many separate ones. For me, looks like some kind of road map. One for 64-bit GUCs, another one to remove short file names from SLRUs and, to make things more complicated, [1] for cf entry [0], to get rid of MultiXactOffset wraparound by switching to 64 bits.
[0] https://commitfest.postgresql.org/49/5205/ [1] https://www.postgresql.org/message-id/flat/CACG%3DezaWg7_nt-8ey4aKv2w9LcuLthHknwCawmBgEeTnJrJTcw%40mail.gmail.com -- Best regards, Maxim Orlov.
