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Re: [GENERAL] effective_io_concurrency increasing - Mailing list pgsql-general

From Melvin Davidson
Subject Re: [GENERAL] effective_io_concurrency increasing
Date
Msg-id CANu8FiwQVQmiCpSgu5J74s03t8bdoxF4GDm0Afr+yM6qHcroTQ@mail.gmail.com
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In response to [GENERAL] effective_io_concurrency increasing  (Patrick B <patrickbakerbr@gmail.com>)
Responses Re: [GENERAL] effective_io_concurrency increasing  (Patrick B <patrickbakerbr@gmail.com>)
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On Sun, Jun 18, 2017 at 9:02 PM, Patrick B <patrickbakerbr@gmail.com> wrote:
Hi guys.

I just wanna understand the effective_io_concurrency value better.

My current Master database server has 16 vCPUS and I use effective_io_concurrency = 0.

What can be the benefits of increasing that number? Also, do you guys have any recommendations? 

I'm using PG 9.2 and the official doc does not say much about which value you should use.

If I put it to 1, does it mean I can have a query spread into 1 processor?

Thanks
P

Perhaps you should read the doc.
https://www.postgresql.org/docs/9.2/static/runtime-config-resource.html

18.4.6. Asynchronous Behavior

effective_io_concurrency (integer)
Melvin Davidson
I reserve the right to fantasize.  Whether or not you
wish to share my fantasy is entirely up to you.

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