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Re: Postgres 8.3 vs. 8.4 - Query plans and performance

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Hello,

that's the 8.4 query plan:
	http://explain.depesz.com/s/dO7

The locale of the two databases is the same:
SHOW LC_COLLATE command gives the locale: "de_DE.UTF-8".

Regards,

Jo

On 14.03.2011 16:04, tv@xxxxxxxx wrote:
Hello

2011/3/14 Jo<jl.news@xxxxxxxxxxx>:
I set the work_mem to 100MB and the shared buffers are 2 GB

The query plans are long and complex. I send the beginning of the
two plans. Hope this helps to understand the differences.
I assume the join strategy in 8.3 differs from the one in 8.4.


these outputs are not too helpful - send a EXPLAIN ANALYZE result

you can use a small aplication for storing plans
http://explain.depesz.com/

I'm afraid he won't be able to provide EXPLAIN ANALYZE as the second query
(on 8.4) does not finish. But providing a full EXPLAIN output is
definitely a good idea - there's no way to solve that using just a piece
of it.

regards
Tomas




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