When I run the same query for the second time it's faster, I want to reset this behavior
I am running a query in oracle 11g select A from B where C = ':D' B has millions of records.
The first time i run it it takes about 30 seconds, the second time i run the query it takes about 1 second.
Obviously it's caching something and i want it to stop that, each time i run the query i want it to take 30s - just like it was running for the first time.
The reason I want to reset this is because for testing purposes I want to measure this query at the very first time.
Please help.
Thanks & Best Regards,
Dark
user9359353 wrote:
I am running a query in oracle 11g select A from B where C = ':D' B has millions of records.
The first time i run it it takes about 30 seconds, the second time i run the query it takes about 1 second.
Obviously it's caching something and i want it to stop that, each time i run the query i want it to take 30s - just like it was running for the first time.
The reason I want to reset this is because for testing purposes I want to measure this query at the very first time.
Please help.
Thanks & Best Regards,
Dark
No - you do NOT want to do that. Not if you want to get results that really represent how that query will work in reality.
See these two AskTom blogs where he discusses the reasons for NOT doing this in detail.
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:7413988573867
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:311990400346061304
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