-Original Message-
From: pgsql-performance-ow...@postgresql.org
[mailto:pgsql-performance-ow...@postgresql.org] On Behalf Of David G Johnston
Sent: Saturday, September 13, 2014 7:34 AM
To: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] weird execution plan
Not everyone does so
Huang, Suya wrote
Both queries have been run several times so cache would have same effect
on both of them? Below is the plan with buffer information.
Not everyone does so its nice to make certain - especially since I'm not all
that familiar with the code involved. But since no one else has
Hi,
Can someone figure out why the first query runs so slow comparing to the
second one? They generate the same result...
dev=# explain analyze select count(distinct wid) from terms_weekly_20140503 a
join port_terms b on a.term=b.terms;
Huang, Suya wrote
Can someone figure out why the first query runs so slow comparing to the
second one? They generate the same result...
Try: EXPLAIN (ANALYZE, BUFFERS)
I believe you are only seeing caching effects.
David J.
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-Original Message-
From: pgsql-performance-ow...@postgresql.org
[mailto:pgsql-performance-ow...@postgresql.org] On Behalf Of David G Johnston
Sent: Friday, September 12, 2014 12:45 PM
To: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] weird execution plan
Huang, Suya wrote
Can
