Re: Index oddity
От | Joshua D. Drake |
---|---|
Тема | Re: Index oddity |
Дата | |
Msg-id | 40C7D63A.7050707@commandprompt.com обсуждение исходный текст |
Ответ на | Re: Index oddity (Mark Kirkwood <markir@coretech.co.nz>) |
Список | pgsql-performance |
>> > ANALYZE might be producing poor stats due to : > > 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 majordomo@postgresql.org -- Command Prompt, Inc., home of Mammoth PostgreSQL - S/ODBC and S/JDBC Postgresql support, programming shared hosting and dedicated hosting. +1-503-667-4564 - jd@commandprompt.com - http://www.commandprompt.com PostgreSQL Replicator -- production quality replication for PostgreSQL
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