Autotrace in SQL Developer

This is a step up over the SQL*Plus version. It displays the stats for every step of the plan. So for each operation you can see metrics such as:

• How many buffer gets it used
• How long it took to run
• How many disk reads and writes it did

For more information, please check the below.

Thanks to Oracle  – https://blogs.oracle.com/sql/entry/how_to_create_an_execution