Re: Oracle Performance

From: Juan Cachito Reyes Pacheco <jreyes_at_dazasoftware.com>
Date: Thu, 11 Mar 2004 10:51:19 -0400
Message-ID: <014401c40778$52421930$2501a8c0@dazasoftware.com>

And is better to do a
SELECT COUNT(*) FROM SC_FACTURACION WHERE COD_IMPORTACION = '14' AND COD_NIVEL_CALIDAD = '1'

Original Message ----- From: Huascar Espinoza To: oracle-l_at_freelists.org Cc: VChoque Sent: Thursday, March 11, 2004 9:35 AM Subject: RE: Oracle Performance

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:

      a.. COD_IMPORTACION 
      b.. NRO_FACTURACION 
      c.. COD_FACTURA_ESTIMADA 
      d.. COD_FACTURA_REFACTURADA 
      e.. COD_MOTIVO_ESTIMACION 
      f.. 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_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] En nombre de DENNIS WILLIAMS   Enviado el: Jueves 11 de Marzo de 2004 9:16   Para: 'oracle-l_at_freelists.org'
  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_at_lifetouch.com

-----Original Message-----

From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org]On

Behalf Of Huascar Espinoza

Sent: Thursday, March 11, 2004 7:04 AM

To: oracle-l_at_freelists.org

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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Received on Thu Mar 11 2004 - 10:11:00 CST