Re: VACUUM and index

Thank you Martijn for your answer !
I use the 8.1.3 release of PostgreSQL.

Will it be sensible to launch an ANALYZE after the VACUUM to update
statistics ?

Regards,
Alexandra

Martijn van Oosterhout wrote:

>On Wed, Jul 19, 2006 at 03:03:43PM +0200, DANTE Alexandra wrote:
>
>
>>Imagine you have a database on which a lot of transactions are done
>>daily : the tables will contain a lot of dead tuples and the B-tree
>>index too.
>>
>>If I do a VACUUM on this database, will the B-tree index be scanned,
>>space reclaimed and made available for re-use ?
>>
>>
>
>Old versions didn't, but recent versions do.
>
>
>
>>Does this action only do by a VACUUM FULL ?
>>
>>
>
>Also by VACUUM FULL, but plain VACIIM is enough.
>
>
>
>>Or is it necessary to do a REINDEX on the index to retrieve a
>>well-balanced tree ?
>>
>>
>
>There are always corner case situations. In older versions a REINDEX
>helped balance the tree but recent versions are much better.
>
>Have a nice day,
>
>