I would have to assume that one of these indexes is on COD_IMPORTACION
COD_NIVEL_CALIDAD. Please provide the explain plans. I assume that you have
also analyzed the SC_FACTURACION table.
From: "Huascar Espinoza" <hespinoza@xxxxxxxxxxxxxxx> Reply-To: oracle-l@xxxxxxxxxxxxx To: <oracle-l@xxxxxxxxxxxxx> CC: "VChoque" <VChoque@xxxxxxxxxxxxxxx> Subject: RE: Oracle Performance Date: Thu, 11 Mar 2004 09:35:18 -0400
To realize the test, we have the basic following structure (similar on Oracle 9i and SQL Server 7.0):
* Table "SC_FACTURACION" have the following indexes: * COD_IMPORTACION * NRO_FACTURACION * COD_FACTURA_ESTIMADA * COD_FACTURA_REFACTURADA * COD_MOTIVO_ESTIMACION * COD_NIVEL_CALIDAD. * Table "GE_HISTORICO_IMPORTACION" has 30 registers. * Table "SC_FACTURACION" has 1,885,618 registers.
On 'SC_FACTURACION' we execute the following SQL sentences:
1. SELECT COUNT(NRO_FACTURACION) FROM SC_FACTURACION WHERE COD_IMPORTACION = '14' AND COD_NIVEL_CALIDAD = '1'
2. SELECT MAX(NRO_FACTURACION) FROM SC_FACTURACION WHERE COD_IMPORTACION = '14' AND COD_NIVEL_CALIDAD = '1'
3. SELECT MIN(NRO_FACTURACION) FROM SC_FACTURACION WHERE COD_IMPORTACION = '14' AND COD_NIVEL_CALIDAD = '1'
The results are:
Sentence Performance ORACLE 9i Performance MS SQL Server 7.0
1 2 minutes 20 secs.
2 2 minutes 1 sec.
3 50 secs. 1 secs.
The servers are the followins features:
ORACLE 9i Server
Processor Intel Pentium IV - 2.4 GHz
RAM Memory 512 MB
S SQL Server 7.0 Server
Processor Intel Celeron 2.4 GHz
RAM Memory 380 MB
Please let me know, why the performance of Oracle is so low.
Thank you!
Huáscar Espinoza
-----Mensaje original-----
De: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] En nombre de DENNIS WILLIAMS
Enviado el: Jueves 11 de Marzo de 2004 9:16
Para: 'oracle-l@xxxxxxxxxxxxx'
Asunto: RE: Oracle Performance
Huascar
Normal? No. In order to help diagnose your situation, please post more
details. Like your query, the sizes of your tables, etc. Have you analyzed
the tables in Oracle?
Dennis Williams DBA Lifetouch, Inc. dwilliams@xxxxxxxxxxxxx
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]On
Behalf Of Huascar Espinoza
Sent: Thursday, March 11, 2004 7:04 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Oracle Performance
¿Is it normal that a SQL sentence: MAX or MIN, execute over 1.5 minutes on Oracle 9i, and in 1 sec. on SQL Server 7.0 (2 millions of registers), using equals data structures and servers? ¿Why occur this situation?
Thank you,
Huascar Espinoza
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