On 9/13/07, Zeugswetter Andreas ADI SD <[EMAIL PROTECTED]> wrote: > > > > 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.
Thanks, Pavan -- Pavan Deolasee EnterpriseDB http://www.enterprisedb.com
