ANALYZE might be producing poor stats due to :Advertising
i) many dead tuples or ii) high proportion of dead tuples in the first few pages of the table
Does a VACUUM FULL followed by ANALYZE change the estimates (or have you tried this already)?
(p.s. - I probably don't qualify for the 'more knowledge' bit either...)
You can also increase your statistics_target which will make ANALYZE take longer but can help a great deal
with larger data sets.
Sincerely,
Joshua D. Drake
regards
Mark
---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
-- Command Prompt, Inc., home of Mammoth PostgreSQL - S/ODBC and S/JDBC Postgresql support, programming shared hosting and dedicated hosting. +1-503-667-4564 - [EMAIL PROTECTED] - http://www.commandprompt.com PostgreSQL Replicator -- production quality replication for PostgreSQL
---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
