Raza
You are right that data is not an issue and so is External table but Select
with few where clause and it cannot be index.
Sanjay
On Friday, January 12, 2018, 2:42:22 PM EST, raza siddiqui
<raza.siddiqui@xxxxxxxxxx> wrote:
Sanjay
Firstly, a 50k datafile is not big by any standards...
Secondly, when External Tables get to be fairly sizeable, one option could be
to load the data into a temp table in the Database, use it then truncate once
done.
Lastly, could the main select be the issue and not the External table or its
data ?
On 1/12/2018 11:28 AM, Powell, Mark wrote:
#yiv6481538145 #yiv6481538145 -- P
{margin-top:0;margin-bottom:0;}#yiv6481538145
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 Database Administration (313) 592-5148
From: oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> on
behalf of Sanjay Mishra <dmarc-noreply@xxxxxxxxxxxxx>
Sent: Friday, January 12, 2018 2:23:40 PM
To: Oracle-L Freelists
Subject: External table performance 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 Sanjay
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