Oracle-L: Re: Long-running PL/SQL function (long)

From: <Rajesh.Rao_at_jpmchase.com>
Date: Tue, 07 Jan 2003 10:04:46 -0800
Message-ID: <F001.00528CF0.20030107100446@fatcity.com>

Cherie,

If network bandwidth is the bottleneck, the use of Fast Refreshable snapshots will be a great help. Whereby you only pull the rows that have changed since the last refresh across to the primary.

Raj

                                                                                                                     
                    Cherie_Machler                                                                                   
                    @gelco.com            To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>        
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                    root_at_fatcity.c        Subject:     Long-running PL/SQL function (long)                           
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                    January 07,                                                                                      
                    2003 12:25 PM                                                                                    
                    Please respond                                                                                   
                    to ORACLE-L

Our developers sent me a function which is running quite long to see if I could give them any advice. It is written in PL/SQL for version 9.2.0.1 of Oracle on Sun Solaris. It is going across a database link. It reads tables in one database and loads a new table in a datamart table on another box. It looks like it will currently run for four or five days to load a 140 million-row table, which is longer than our available window.

I am wondering if anyone can look at the big picture and see if there are any obvious places for improvement of this overall design. I am open to any suggestions that I can relay back to the developers.

My gratitude to anyone who can wade through this and recommend improvements.

Cherie Machler
Oracle DBA
Gelco Information Network

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INET: Rajesh.Rao_at_jpmchase.com

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