On Thu, May 27, 2021 at 05:45:21PM +0800, Neil Chen wrote:
> Greetings,
>
> On Thu, May 27, 2021 at 4:52 PM Bruce Momjian <bruce@momjian.us> wrote:
>
> >
> > I am confused why checksums, which are widely used, acceptably require
> > wal_log_hints, but there is concern that file encryption, which is
> > heavier, cannot acceptably require wal_log_hints. I must be missing
> > something.
> >
> > Why can't checksums also throw away hint bit changes like you want to do
> > for file encryption and not require wal_log_hints?
>
>
>
> I'm really confused about it, too. I read the above communication, not sure if
> my understanding is correct... What we are facing is not only the change of
> flag such as *pd_flags*, but also others like pointer array changes in btree
> like Robert said. We don't need them to write a WAL record.
Well, the code now does write full page images for hint bit changes, so
it should work fine.
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EDB https://enterprisedb.com
If only the physical world exists, free will is an illusion.