Re: How to write a script to analyze and vacuum all the tables in the system catalog?Thanks.

On 05/17/2012 11:30 AM, leaf_yxj wrote:
> Hi Guys. Please help me about this.
>
> For postgres database, it looks like we need analyze and vacuum all the
> tables periodly.  I need to write a script which can be executed in crontab.
> I don't have any clues about that. I only know the command :
> analyze tablename;
> vacuum tablename;
Leave off the tablename to do the whole db. But (unless you are on a
really old version of PG) you really shouldn't need to manually vacuum
things as that is the job of the autovacuum process.

There are unusual situations that suggest a manual analyze. It should be
run right after a cluster for instance. But they are limited special cases.

What indicates that you need to vacuum or analyze via cron?

Cheers,
Steve