Re: Does VACUUM reorder tables on clustered indices
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Тема | Re: Does VACUUM reorder tables on clustered indices |
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Msg-id | 00e001c605bd$e23ca1a0$0600000a@d505 обсуждение исходный текст |
Ответ на | Does VACUUM reorder tables on clustered indices (frank church <pgsql@adontendev.net>) |
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Re: Does VACUUM reorder tables on clustered indices
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Список | pgsql-sql |
Hi, Utilize <b>CLUSTER;</b> (after vacuum) to reorder the data. Regards ----- Original Message ----- From: "Jim C. Nasby" <jnasby@pervasive.com> To: "Martin Marques" <martin@bugs.unl.edu.ar>; "frank church" <pgsql@adontendev.net>; <pgsql-sql@postgresql.org> Sent: Tuesday, December 20, 2005 10:41 PM Subject: Re: [SQL] Does VACUUM reorder tables on clustered indices > On Sun, Dec 18, 2005 at 07:01:39PM -0300, Alvaro Herrera wrote: >> Martin Marques escribi?: >> > On Sun, 18 Dec 2005, frank church wrote: >> > >> > > >> > >Does VACUUMing reorder tables on clustered indices or is it only the >> > >CLUSTER >> > >command that can do that? >> > >> > Cluster does that. Vacuum only cleans dead tuples from the tables. >> >> Note that while reordering, CLUSTER also gets rid of dead tuples, so if >> you cluster you don't need to vacuum. > > It also does a REINDEX... > -- > Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com > Pervasive Software http://pervasive.com work: 512-231-6117 > vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461 > > ---------------------------(end of broadcast)--------------------------- > TIP 6: explain analyze is your friend > >
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