| From: | "Relyea, Mike" <Mike(dot)Relyea(at)xerox(dot)com> |
|---|---|
| To: | <pgsql-general(at)postgresql(dot)org> |
| Subject: | Explain analyze gives no info |
| Date: | 2005-06-21 12:50:34 |
| Message-ID: | 1806D1F73FCB7F439F2C842EE0627B180228F139@usa0300ms01.na.xerox.net |
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| Lists: | pgsql-general |
I am trying to optimize a delete query that's currently taking 4 hours
to run. My first step was to add some indexes on some of my FK's. That
sped up my select queries by as much as ~20x. From 3.5 sec to < 0.25
sec. They didn't help my delete query. I ran an explain analyze on the
delete query and the records got deleted after 4 hours but it never
showed me the query plan. I'm using 8.0.1 on WinXP accessing it with
pgAdminIII.
FWIW, the DB has a lot of FK's and some of them (the ones on my big
tables 1-10 million records) have ON DELETE CASCADE triggers.
Any suggestions for how to get the explain analyze output?
Mike
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