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Re: pg_stat_get_last_vacuum_time(): why non-FULL?

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On 2013-03-31 18:31, CR Lender wrote:
> On 2013-03-28 20:44, Kevin Grittner wrote:
>> CR Lender <crlender@xxxxxxxxx> wrote:
>>> I've read the manual more carefully now, and I can't see any mention of
>>> what VACUUM does that VACUUM FULL does not. The point about extreme
>>> maintainance is taken, but from what I read, VACUUM FULL should include
>>> everything a normal VACUUM does.
>> 
>> Prior to release 9.0 that is probably true.
> 
> Hm, I can't find it, even in the manual for 9.2.
> http://www.postgresql.org/docs/current/static/sql-vacuum.html
> 
> If VACUUM FULL is just a more aggressive VACCUM (including writing new
> data files), then I don't understand the "non-FULL" restriction in
> pg_stat_get_last_vacuum_time()... unless that information is somehow
> lost when table files are rewritten.

I don't mean to be pushy, but I have a meeting with the admin of that
database tomorrow, and it would be nice if I had something concrete to
tell him. I still don't know what it is that VACCUM does but VACUUM full
doesn't do. There's nothing in the manual about that.

Thanks,
crl


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