> The COLD updated (old) tuple would be pruned to dead line pointer > once the tuple becomes DEAD. Normally that would let us reuse the > tuple storage for other purposes. We do the same for DELETEd tuples.
Oh, I thought only pruned tuples from HOT chains can produce a "redirect dead" line pointer.
This looks like a problem, since we might end up with a page filled with LP_DEAD slots, that all have no visibility info and can thus not be cleaned by vacuum.
It has nothing to do with visibility info. We already know the tuple is DEAD and thats why its line pointer is LP_DEAD.
