Another thing is that if you're going through heap_copy_data, the tuple
is only checked for DEAD, not RECENTLY_DEAD. Maybe there is no bug here
but I'm not sure yet.
I attach the patch as I have it now -- mostly comment tweaks, but also
the change to not mark page as all-frozen when we skip freezing a
recently read tuple. I also renamed the test case, because I think it
may be possible to reach the problem code without involving a multixact.
Haven't tried too hard though.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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