From: Merlin Moncure <mmoncure@gmail.com>
To: CS DBA <cs_dba@consistentstate.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Problem query
Date: Wed, 1 Jun 2011 16:15:24 -0500
Message-ID: <BANLkTimirG-4HDFXKbcgkagLes8eCjWwLQ@mail.gmail.com> (raw)
In-Reply-To: <4DE69D92.5040407@consistentstate.com>
References: <4DE69D92.5040407@consistentstate.com>
On Wed, Jun 1, 2011 at 3:14 PM, CS DBA <cs_dba@consistentstate.com> wrote:
> Hi All;
>
> We have a table with approx 200 columns. about a dozen columns are text data
> types and the rest are a mix of integers , bigint's and double precision
> types.
>
> The table has about 25million rows.
>
>
> The app wants to run a query like this:
>
> select count(pri_num) from max_xtrv_st_t
> where pri_num in (select max(pri_num) from max_xtrv_st_t where 1=1
> group by tds_cx_ind, cxs_ind_2 )
>
> I've tried to split the query up but made little progress, pri_num and
> tds_cx_ind are bigint's and cxs_ind_2 is an integer
>
> The table has an index on all 3 columns (3 separate indexes)
>
> Anyone have any thoughts on tuning this query?
need postgres version# and the current explain analyze (or explain, if
you can't wait for it)
merlin
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To: pgsql-performance@postgresql.org
Cc: mmoncure@gmail.com, cs_dba@consistentstate.com
Subject: Re: Problem query
In-Reply-To: <BANLkTimirG-4HDFXKbcgkagLes8eCjWwLQ@mail.gmail.com>
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