FAQ: how to read EXPLAYN ANALYZE and act upon

The subjects says it all.

I'm looking for a tutorial that will teach me how to read explain
analyze and maybe point me to some solutions (rewriting the query,
adding some indexes, tune postgres.conf...).

I notice I HUGE difference reordering join.
Are there guidelines to reorder joint too?

thanks

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Ivan Sergio Borgonovo
http://www.webthatworks.it