Mark
Oracle 12.1.2 and it is Single Node RAC instance and is Enterprise Edition. The
issue with Select is where Clause for 2-3 column where Index can definitely be
helpful but External table dont allow index. Select was Tried with Parallel but
no difference in terms of performance. One option trying is MV and as data is
not much but table is extensively used for various purpose.
Sanjay
On Friday, January 12, 2018, 2:29:48 PM EST, Powell, Mark
<mark.powell2@xxxxxxx> wrote:
#yiv0902582470 #yiv0902582470 -- P
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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 PowellDatabase 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.
TxSanjay
