Hi all,
While reviewing freeze map code, Andres pointed out[1] that
lazy_scan_heap could accesses visibility map twice and its logic is
seems a bit tricky.
As discussed before, it's not nice especially when large relation is
entirely frozen.
I posted the patch for that before but since this is an optimization,
not bug fix, I'd like to propose it again.
Please give me feedback.
[1] https://www.postgresql.org/message-id/20160505000840.epatoq6d2e556446%40alap3.anarazel.de
Regards,
--
Masahiko Sawada
