From: Laurenz Albe <laurenz.albe@cybertec.at>
To: Nagaraj Raj <nagaraj.sf@yahoo.com>
To: Pgsql Performance <pgsql-performance@lists.postgresql.org>
Subject: Re: simple query running for ever
Date: Wed, 17 Jun 2020 11:23:52 +0200
Message-ID: <832b7c51f310e5d9fc35f5f1310a736dba4422a3.camel@cybertec.at> (raw)
In-Reply-To: <574079062.1873527.1592339731136@mail.yahoo.com>
References: <574079062.1873527.1592339731136.ref@mail.yahoo.com>
<574079062.1873527.1592339731136@mail.yahoo.com>
On Tue, 2020-06-16 at 20:35 +0000, Nagaraj Raj wrote:
> I wrote a simple query, and it is taking too long, not sure what is wrong in it, even its not giving EXPLAIN ANALYZE.
>
> select T0."physical_address_sid", T0."individual_entity_proxy_id", T2."infrrd_hh_rank_nbr"
> from "cms_prospects".PROSPECT T0
> --inner join "sas_prs_tmp".DEDUPE3583E3F18 T1 on T0."individual_entity_proxy_id" = T1."individual_entity_proxy_id"
> left join "cms_prospects".INDIVIDUAL_DEMOGRAPHIC T2 on T0."individual_entity_proxy_id" = T2."individual_entity_proxy_id"
>
>
> "Merge Left Join (cost=55.96..18147747.08 rows=213620928 width=20)"
> " Merge Cond: (t0.individual_entity_proxy_id = t2.individual_entity_proxy_id)"
> " -> Index Scan using pk_prospect on prospect t0 (cost=0.57..10831606.89 rows=213620928 width=16)"
> " -> Index Only Scan using indxp_individual_demo_infrrd_hh_rank_nbr on individual_demographic t2 (cost=0.57..5013756.93 rows=260652064 width=12)"
>
>
>
> Any suggestions or help would be highly appreciated.
The only potential improvement I can see is to strive for an
"index only scan" on "prospect".
For that, you'd have to add and INCLUDE clause to "pk_prospect"
so that "physical_address_sid" and "individual_entity_proxy_id"
are included and VACUUM the table.
Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com
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To: pgsql-performance@postgresql.org
Cc: laurenz.albe@cybertec.at, nagaraj.sf@yahoo.com, pgsql-performance@lists.postgresql.org
Subject: Re: simple query running for ever
In-Reply-To: <832b7c51f310e5d9fc35f5f1310a736dba4422a3.camel@cybertec.at>
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