How do we want to handle the case where VACUUM FULL clears the
visibility map, causing loss of index-only scans?

        http://archives.postgresql.org/pgsql-performance/2012-11/msg00317.php

Do we document this behavior or add a TODO item?

-- 
  Bruce Momjian  <[email protected]>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + It's impossible for everything to be true. +


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