Re: storing an explicit nonce

On Wed, May 26, 2021 at 03:49:43PM -0400, Stephen Frost wrote:
> Greetings,
> 
> * Bruce Momjian (bruce@momjian.us) wrote:
> > OK, that's what I thought.  We already expose the clog and fsm, so
> > exposing the hint bits seems acceptable.  If everyone agrees, I will
> > adjust my patch to not WAL log hint bit changes.
> 
> Robert pointed out that it's not just hint bits where this is happening
> though, but it can also happen with btree line pointer arrays.  Even if
> we were entirely comfortable accepting that the hint bits are leaked
> because of this, leaking the btree line pointer array doesn't seem like
> it could possibly be acceptable..
> 
> I've not run down that code myself, but I don't have any reason to doubt
> Robert's assessment.

OK, I guess we could split out log_hints to maybe just FPW-log btree
changes or something, but my recent email questions why wal_log_hints is
an issue anyway.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  If only the physical world exists, free will is an illusion.