does using optimizer_mode=first_rows_n for application that using Oracle database is a best practice?
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01-03-2021 - |
Question
So I'm working in application that involving display of data in table/grid. And the grid will invoke paging query to oracle. So does by tuning my application to get the best query cost with optimizer_mode=first_rows_10
is always good and consider best practice with this kind paging search with html table or any table based approach application.
Solution
If you're not ready to make this a system-wide setting, you could try it in an isolated fashion by using a query hint:
SELECT /*+ FIRST_ROWS(10) */
first_column,
second_column
FROM my_table_or_view
This is less risky, since you don't need to consider the effects on the entire system.
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