enable_XXX options

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От Peterson, Bjorn
Тема enable_XXX options
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Msg-id 42E7C401A4CBCD49829BB53DDD538BA40211439B@chmpgexgmail3.ic.ncs.com
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Ответы Re: enable_XXX options  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-performance

I have a query in my application that takes an unreasonable amount of time to complete (>4.5 hours execution time).   After reviewing the EXPLAIN and EXPLAIN ANALYZE output for that and similar queries, my colleagues and I determined that turning off the enable_nestloop option might help – we noticed dramatic speed improvements for that specific query after doing so (<2 minutes execution time).  I was warned not to mess with the enable_XXX options in a production environment, but does anyone see any problem with turning off the enable_nestloop option right before executing my query and turning it back on afterwards?

 

Bjorn Peterson

Software Engineer

Pearson School Technologies

Bloomington, MN

(952) 681-3384

 

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