Re: pg_stats how-to?

My immediate problem is to decrease vacuum times.

Yudhvir
=======

On 5/14/07, Jim C. Nasby <decibel(at)decibel(dot)org> wrote:
>
> On Mon, May 14, 2007 at 12:02:03PM -0700, Y Sidhu wrote:
> > I am sorry about this Jim, please understand that I am a newbie and am
> > trying to solve long vacuum time problems and get a handle on speeding
> up
> > queries/reports. I was pointed to pg_stats and that's where I am at now.
> I
>
> Well, I have no idea what that person was trying to convey then. What
> are you trying to look up? Better yet, what's your actual problem?
>
> > have added this into my conf file:
> > stats_start_collector TRUE stats_reset_on_server_start FALSE
> > stats_command_string TRUE
> > However, these being production servers, I have not enabled these:
> > stats_row_level stats_block_level
> FYI, stats_command_string has a far larger performance overhead than any
> of the other stats commands prior to 8.2.
>
> > Yes, I have re-started the server(s). It seems like I query tables to
> get
> > the info. If so, are there any queries written that I can use?
> >
> > Thanks for following up on this with me.
> >
> > Yudhvir
> >
> > ===
> > On 5/14/07, Jim C. Nasby <decibel(at)decibel(dot)org> wrote:
> > >
> > >On Mon, May 14, 2007 at 11:09:21AM -0700, Y Sidhu wrote:
> > >> The stats_block_level and stats_row_level are NOT enabled. The
> question
> > >is
> > >> how to use pg_stats. Do I access/see them via the ANALYZE command? or
> > >using
> > >> SQL. I cannot find any document which will get me started on this.
> > >
> > >Ok, we're both confused I think... I thought you were talking about the
> > >pg_stat* views, which depend on the statistics collector (that's what
> > >the stats_* parameters control).
> > >
> > >That actually has nothing at all to do with pg_stats or pg_statistics.
> > >Those deal with statistics about the data in the database, and not
> about
> > >statistics from the engine (which is what the pg_stat* views do...).
> > >
> > >If you want to know about pg_stats, take a look at
> > >http://www.postgresql.org/docs/8.2/interactive/view-pg-stats.html ...
> > >but normally you shouldn't need to worry yourself about that. Are you
> > >trying to debug something?
> > >
> > >Information about the backend statistics can be found at
> > >http://www.postgresql.org/docs/8.2/interactive/monitoring.html
> > >--
> > >Jim Nasby decibel(at)decibel(dot)org
> > >EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
> > >
> >
> >
> >
> > --
> > Yudhvir Singh Sidhu
> > 408 375 3134 cell
>
> --
> Jim Nasby decibel(at)decibel(dot)org
> EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
>

--
Yudhvir Singh Sidhu
408 375 3134 cell