On Mon, 14 Mar 2022 at 18:14, Andres Freund <and...@anarazel.de> wrote: > > A random thought I had while thinking about the size limits: We could use the > low bits of the length and xl_prev to store XLR_SPECIAL_REL_UPDATE | > XLR_CHECK_CONSISTENCY and give rmgrs the full 8 bit of xl_info. Which would > allow us to e.g. get away from needing Heap2. Which would aestethically be > pleasing.
I just remembered your comment while going through the xlog code and thought this about the same issue: We still have 2 bytes of padding in XLogRecord, between xl_rmid and xl_crc. Can't we instead use that space for rmgr-specific flags, as opposed to stealing bits from xl_info? Kind regards, Matthias van de Meent
