Re: Question about VACUUM - Mailing list pgsql-performance

From Scott Marlowe
Subject Re: Question about VACUUM
Date
Msg-id CAOR=d=0Fqhg_-W7cUc+OFaab7ajyyoO+o6hR88=dNndQqpvdKA@mail.gmail.com
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In response to Question about VACUUM  (Ernesto Quiñones <ernestoq@gmail.com>)
Responses Re: Question about VACUUM
List pgsql-performance
On Fri, Dec 2, 2011 at 8:32 PM, Ernesto Quiñones <ernestoq@gmail.com> wrote:
> Hi friends
>
> I want to know if it's possible to predict (calculate), how long a
> VACUUM FULL process will consume in a table?
>
> can I apply some formula to calculate this?

If you look at what iostat is doing while the vacuum full is running,
and divide the size of the table by that k/sec you can get a good
approximation of how long it will take.  Do you have naptime set to
anything above 0?

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