9.2.1 & index-only scans : abnormal heap fetches after VACUUM FULL

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Cc: Guillaume Cottenceau <gc(at)mnc(dot)ch>
Subject: 9.2.1 & index-only scans : abnormal heap fetches after VACUUM FULL
Date: 2013-01-09 23:07:31
Message-ID: [email protected]
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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 <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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

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