A talk I gave at Multipack Show & Tell in February 2011

4. 'Explain Extended' feature of MySQL

5. Apache custom logs, page load time (%D)

6. mysql> show processlist;

7. iostat -x 10 / munin / RDDtool etc.

9. Explain extended and times for all queries on page

10. Page load times recorded for all users

12. consumer Intel SSD: 64.3MB/sec

15. A index can cover several columns but can't miss one

16. Examples...

17. WHERE user=1 AND pub_date=NOW() AND id=34

18. WHERE user=1 AND id=34

19. WHERE user=1 AND pub_date < NOW() AND id=34 User pub_date id User pub_date id User pub_date id

21. SELECT date_pub FROM table1

22. WHERE User=2

23. Not covering...

24. SELECT name FROM table1

25. WHERE user=2 User pub_date id User pub_date id

28. Subset indexes of other indexes

29. Anything you don't have a query for – design indexes for queries User pub_date User pub_date id

31. www.rythie.com

32. [email_address]