From: | Nicolás Domínguez Florit <ndomin(at)rec(dot)unicen(dot)edu(dot)ar> |
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To: | <pgsql-es-ayuda(at)postgresql(dot)org> |
Subject: | dudas de un insert |
Date: | 2005-12-13 14:09:36 |
Message-ID: | 185901c5ffee$d9d2fe30$ea84a8c0@Nico |
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Lists: | pgsql-es-ayuda |
Tengo una senetencia sql como la siguiente:
INSERT INTO dh03 SELECT * FROM DHTEMP;
Query OK, 65066 rows affected (364,05 sec)
y dhtemp tiene aprox. 65000 filas. El insert me tarda en ejecutar 364
segundos!
Que se les ocurre para acelerar los inserts?
Muchas gracias.
Nicolas.
PD:Buscando en google encontre una pagina con algo que no se que tan cierto
sera (http://www.sambar.polie.nl/sqllite.htm)
Test 10: INSERTs from a SELECT
BEGIN;
INSERT INTO t1 SELECT * FROM t2;
INSERT INTO t2 SELECT * FROM t1;
COMMIT;
PostgreSQL: 54.822
MySQL: 1.512
SQLite 2.4: 4.423
SQLite 2.4 (nosync): 2.386
The poor performance of PostgreSQL in this case appears to be due to its
synchronous behavior. The CPU was mostly idle during the 55 second run.
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