rwp training optimizer hands-on exercise - oracle · title: how to use the powerpoint template...

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RWP Training Optimizer Hands-On Exercise

This hands on exercise is a step by step guide which will guide you through resolving issues preventing the optimizer from choosing the optimal execution plans for a set of queries.

Use your assigned user account for the linux login:

– username userXXY e.g. user031

– password userXXY e.g. user031

Overview


RWP Training Optimizer Hands-On Exercise

Then use your team database :

– schema optXXY e.g. opt031

– password optXXY e.g.. opt031

– For example:

– sqlplus opt031/opt031

All of the scripts are in the ~/opt directory.

To get started:


RWP Training SQL Hands-On Exercise

1. Run 01.query_1.sql

View the SQL Monitor Report.

Note any problems with the SQL execution.



2. Run 02.desc_lineorder.sql

Note any issues between the table columns and how the SQL statement is written.





Why is the SQL statement executing faster now?





Note any problems with the SQL execution.



5. Run 05.check_lineorder_stats.sql

Note any issues with the table stats relative to the two queries.



6. Run 06.gather_stats_lineorder.sql

Regather stats on the lineorder table.



7. Run 07.check_lineorder_stats.sql

What changed with the stats on the lineorder table?




Has the execution plan or time for query 1 changed?




Has the execution plan or time for query 2 changed?





Note any problems with the SQL execution of query 3.





Note any problems with the SQL execution of query 4.



12. Run 12.set_parallel.sql

Set the degree of parallel on the tables and indexes.





Note any changes in the execution plan or run time with parallel execution.



15. Run 15.check_table_stats.sql

Check the table stats.

Are there any issues with the table stats?



16. Run 16.check_supplier_column_stats.sql

Check the column stats on the supplier table.

Are there any issues with the column stats?



17. Run 17.gather_stats_supplier.sql

Regather stats on the supplier table.



18. Run 18.check_table_stats.sql

Check the new stats on the supplier table.

Are there any changes?




Check the new column stats on the supplier table.

Are there any changes?




Run query 3 and note any differences in the execution plan and time.




Run query 4 and note any differences in the execution plan and time.



22. Run 22.column_group_supplier.sql

Create a column group on the supplier table and regather stats.




Run query 4.



25. Run 25.gather_stats_supplier.sql

Regather stats on the supplier table.




Run query 4.

rwp training optimizer hands-on exercise - oracle · title: how to use the powerpoint template...

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