Re: External table performance
Date: Fri, 12 Jan 2018 19:38:52 +0000
Message-ID: <DF4PR8401MB1276E7A6220823AAE17EEA8DCC170_at_DF4PR8401MB1276.NAMPRD84.PROD.OUTLOOK.COM>
From the 10.2 manual it appears you need to create the external table with the parallel degree declared. I do not have time to check more recent manuals.
https://docs.oracle.com/cd/B19306_01/server.102/b14215/et_concepts.htm
External Tables Concepts - Oracle<https://docs.oracle.com/cd/B19306_01/server.102/b14215/et_concepts.htm>
docs.oracle.com
The external tables feature is a complement to existing SQL*Loader functionality. It enables you to access data in external sources as if it were in a table in the ...
Mark Powell
Database Administration
(313) 592-5148
From: oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> on behalf of Powell, Mark Sent: Friday, January 12, 2018 2:28:49 PM To: Oracle-L Freelists
Subject: Re: External table performance
Sanjay, you did not identify your Oracle version and edition nor post the actual code you have an issue with but consider the following.
I do not have access to a server where I can test right now but I believe that you can select from an external table using parallel query if you are on EE.
Mark Powell
Can someone share the Tuning activites that can be done for Selecting data from External table in 12c (12.1)? I am working on project that is getting every 6hourly data as flat file from external source and then has to be selected from ORacle table for some processing. Data is only 50K records but Select is taking time. It is Local Storage where File is located. I don;t think we can have indexes yet and so checking experience from the experts.
Tx
Database Administration
(313) 592-5148
From: oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> on behalf of Sanjay Mishra <dmarc-noreply_at_freelists.org>
Sent: Friday, January 12, 2018 2:23:40 PM
To: Oracle-L Freelists
Subject: External table performance
Sanjay
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Received on Fri Jan 12 2018 - 20:38:52 CET