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Re: low perfomances migrating from 9.3 to 9.5 - Mailing list pgsql-general

From Michael Paquier
Subject Re: low perfomances migrating from 9.3 to 9.5
Date
Msg-id CAB7nPqT3sGnCVVm+yUKyCthH01KmGkg3t0+oUX=s_4=rJubNDA@mail.gmail.com
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In response to low perfomances migrating from 9.3 to 9.5  (thomas veymont <thomas.veymont@gmail.com>)
Responses Re: low perfomances migrating from 9.3 to 9.5  (thomas veymont <thomas.veymont@gmail.com>)
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On Wed, Jul 27, 2016 at 5:54 PM, thomas veymont
<thomas.veymont@gmail.com> wrote:
> We switched from PostgreSQL server 9.3 to 9.5. From the very beginning there
> was a noticeable drop in performances (for example : when injecting our SQL
> dumps into 9.5, COPY and CREATE INDEX were very slow).
>
> Our configuration file was the same for 9.3 and 9.5, except for the
> "chekpoint segment" that has been deprecated.

Which value are you using for max_wal_size and min_wal_size? And which
value of checkpoint_segments did you use previously? This could
influence the checkpoint frequency.
--
Michael

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