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Query Tuning 101 What to Look for in Autotrace Output

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You're up and running with autotrace, looking at the actual execution plan for a query. Now the real work begins! What is it you're actually looking for in the execution plan? This video shows what you need to investigate and how to use the HotSpot feature of SQL Developer 4.1 to highlight parts of the query you need to pay attention to. ============================ The Magic of SQL with Chris Saxon Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
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Text Comments (4)
Ali (2 years ago)
Hi, I can only see operation, object_name, cost and LAST_CR_BUFFER_GETS in auto trace. Is it related to SQL Developer version? I did create the plus trace and granted access to those dictionary objects. Thanks
Garrett Hartley (1 year ago)
I check the box but still don't see any of the LAS_* values. . . Any ideas?
Ali (2 years ago)
+Ali Thanks a lot. :)
The Magic of SQL (2 years ago)
+Ali You can choose which columns appear in the preferences. Go to Tools -> Preferences... -> Database -> Autotrace/Explain Plan All the options are listed there.

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