1. How to solve a SQL performance problem Paul Zgondea

2. Agenda DBA monitoring tools Finding the culprit Optimization time

3. First Response of a DBA What do you do when somebody asks you to investigate what’s stressing out the SQL server? What tools do you use ? What do you do when the SQL Server is too busy to accept your connection ?

4. Dedicated Admin Connection Enable DAC EXEC sp_configure 'remote admin connections', 1; GO RECONFIGURE GO

5. sp_whoisactiveby Adam Machanic Alternative for sp_who and sp_who2 Why it’s better: Runs quickly and does not use a lot of resources. Shows only the active queries (no sleeping and system processes) Shows how long the queries have been running for Shows the formatted SQL Text and Plan (@get_plans = 1) Shows waits information Shows CPU, Tempdb information,

6. DEMO TIME

7. Capture the events Extended events – fast, asynchronous – steep learning curve. SQL Trace / Profiler – old method but still used – synchronous and it adds extra load on the server.

8. Analyze the captured data Retrieve the captured data Filter, clean and group data so we can analyze it accordingly Identify the most resource intensive queries

9. Optimization time! Execution plan Indexes Re-writes Testing the final result

10. DEMO TIME

12. Thank you for attending! Resources will be available soon on WWW.SQLCLUJ.COM