On Tue, Jan 12, 2021 at 01:46:53PM -0500, Bruce Momjian wrote: > On Tue, Jan 12, 2021 at 01:15:44PM -0500, Bruce Momjian wrote: > > Well, we have eight unused bits in the IV, so we could just increment > > that for every hint bit change that uses the same LSN, and then force a > > dummy WAL record when that 8-bit counter overflows --- that seems > > simpler than logging hint bits. > > Sorry, I was incorrect. The IV is 16 bytes, made up of the LSN (8 > bytes), and the page number (4 bytes). That leaves 4 bytes unused or > 2^32 values for hint bit changes before we have to generate a dummy LSN > record.
I just did a massive update to the Transparent Data Encryption wiki page to make it more readable and updated it with current decisions: https://wiki.postgresql.org/wiki/Transparent_Data_Encryption -- Bruce Momjian <br...@momjian.us> https://momjian.us EnterpriseDB https://enterprisedb.com The usefulness of a cup is in its emptiness, Bruce Lee