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From: Thomas Kellerer <spam_eater@gmx.net>
To: pgsql-performance@postgresql.org
Subject: Re: Query Performance question
Date: Mon, 14 Jul 2014 15:48:03 +0200
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Magers, James, 14.07.2014 15:18:
> Thank you.  I executed the query this morning after disabling the scan types.  
> I am including links to explain.depesz output for each of the three variations that I executed.  
> 
> indexscan and bitmapscan off: http://explain.depesz.com/s/sIx
> seqscan and bitmapscan off: http://explain.depesz.com/s/GfM
> bitmapscan off: http://explain.depesz.com/s/3wna
> 

So the original query (using an "Index Scan" + "Bitmap Index Scan") is indeed the most efficient one: 4ms vs. 39ms vs. 64ms 








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