From: Y Sidhu <ysidhu@gmail.com>
To: Jim C. Nasby <decibel@decibel.org>
Cc: pgsql-performance@postgresql.org
Subject: Re: pg_stats how-to?
Date: Mon, 14 May 2007 12:02:03 -0700
Message-ID: <b09064f30705141202o2cd183d7ta6914da150f3f503@mail.gmail.com> (raw)
In-Reply-To: <20070514183615.GW69517@nasby.net>
References: <4647B0A9.7080304@gmail.com>
<bf54be870705131751g32e29447l4ec3a2bfabca10e6@mail.gmail.com>
<b09064f30705140916o7c1d1a24h2bdabd3714df2187@mail.gmail.com>
<20070514162610.GO69517@nasby.net>
<b09064f30705140928x6b44f03dtdb93ebd18e7cdaca@mail.gmail.com>
<20070514174558.GS69517@decibel.org>
<b09064f30705141109m7c2f57an802f8fe0485a65bb@mail.gmail.com>
<20070514183615.GW69517@nasby.net>
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
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
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@decibel.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@decibel.org
> EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
>
--
Yudhvir Singh Sidhu
408 375 3134 cell
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To: pgsql-performance@postgresql.org
Cc: ysidhu@gmail.com, decibel@decibel.org
Subject: Re: pg_stats how-to?
In-Reply-To: <b09064f30705141202o2cd183d7ta6914da150f3f503@mail.gmail.com>
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