Guide to Posting Slow Query Questions

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От Jeff Janes
Тема Guide to Posting Slow Query Questions
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Msg-id CAMkU=1wJz87pNuxeKKx7mUi+b2LEzKpM0Z2U8qK9Lf6MyN_-0A@mail.gmail.com
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Ответы Re: Guide to Posting Slow Query Questions  (Ants Aasma <ants@cybertec.at>)
Список pgsql-performance
Regarding the wiki page on reporting slow queries:

https://wiki.postgresql.org/wiki/Slow_Query_Questions


We currently recommend EXPLAIN ANALYZE over just EXPLAIN.  Should we
recommend EXPLAIN (ANALYZE, BUFFERS) instead?  I know I very often
wish I could see that data.  I don't think turning buffer accounting
on adds much cost over a mere ANALYZE.


Also, an additional thing that would be nice for people to report is
whether long running queries are CPU bound or IO bound.  Should we add
that recommendation with links to how to do that in a couple OS, say,
Linux and Windows.  If so, does anyone know of good links that explain
it for those OS?

Cheers,

Jeff


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