Re: [HACKERS] free space map and visibility map

On Mon, Mar 20, 2017 at 11:28 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> On Sat, Mar 18, 2017 at 5:42 PM, Jeff Janes <jeff.janes@gmail.com> wrote:
>> Isn't HEAP2_CLEAN only issued before an intended HOT update?  (Which then
>> can't leave the block as all visible or all frozen).  I think the issue is
>> here is HEAP2_VISIBLE or HEAP2_FREEZE_PAGE.  Am I reading this correctly,
>> that neither of those ever update the FSM, regardless of FPI?
>
> Yes, updates to the FSM are never logged.  Forcing replay of
> HEAP2_FREEZE_PAGE to update the FSM might be a good idea.
>

I think I was missing something. I imaged your situation is that FPI
is replayed during crash recovery after the crashed server vacuums the
page and marked it as all-frozen. But this situation is also resolved
by that solution.

Regards,

--
Masahiko Sawada
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center