Re: Question about VACUUM

From: Ernesto Quiñones <ernestoq(at)gmail(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Question about VACUUM
Date: 2011-12-03 13:11:49
Message-ID: CAMB2kH6OHJ32hwvqRAkMoUr_X5rM0ZtR8s1QQSNjJbORR7mi+A@mail.gmail.com
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Thanks for the answer Scott, actually my autovacuum_naptime is 1h ..
but I don't find naptime parameter for a manual vacuum

thanks again

2011/12/2 Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>:
> On Fri, Dec 2, 2011 at 8:32 PM, Ernesto Quiñones <ernestoq(at)gmail(dot)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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