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full vacuum really slows down query - Mailing list pgsql-general

From Jason Long
Subject full vacuum really slows down query
Date
Msg-id 48471106.3050107@supernovasoftware.com
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Responses Re: full vacuum really slows down query  ("Joshua D. Drake" <jd@commandprompt.com>)
Re: full vacuum really slows down query  (Tom Lane <tgl@sss.pgh.pa.us>)
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I have a query that takes 2 sec if I run it from a freshly restored
dump.  If I run a full vacuum on the database it then takes 30 seconds.

Would someone please comment as to why I would see a 15x slow down by
only vacuuming the DB?  Reindexing does not help, and a full vacuum was
run just prior to the dump.

I run a full vacuum every night.

I am using 8.3.1

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