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Too slow

From: Sabio - PSQL <slopez_pg(at)ceroriesgo(dot)co(dot)cr>
To: PostgreSQL Admin <pgsql-admin(at)postgresql(dot)org>
Subject: Too slow
Date: 2005-03-22 14:23:07
Message-ID: 42402A4B.70703@ceroriesgo.co.cr (view raw or flat)
Thread:
Lists: pgsql-adminpgsql-performance
How can I improve speed on my queries. For example this query takes one 
day executing itself and it has not finalized !!!
"create table tmp_partes as select * from partes where identificacion 
not in (select cedula from sujetos)"

partes have 1888000 rows, an index on identificacion
sujetos have 5500000 rows, an index on cedula





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