1. LAMP Optimization
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

2. 50 Slides!
(counting this one)
http://slideshare.net/csixty4
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

3. I’m not a sysadmin
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

4. I’m not a sysadmin
but I know what I like.
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

5. I
Like
Fast
Servers
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

6. LAMP
Linux
Apache
MySQL
PHP
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

7. Optimizing Linux
Prevent swapping
Disable atime updates
Buy another machine
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

8. vmstat -S M
Virtual memory statistics in
Megabytes (or Kilobytes)
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

9. “Free” drop +
High “Swap” =
Poor performance
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

10. RAM is cheap.
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

11. “Access Timestamp”
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

12. “I agree, we really should do
something about atime.”
- Linus Torvalds, 2007
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

13. Edit /etc/fstab
In the fourth column,
add noatime,nodiratime
Save. Reboot.
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

14. Time is money.
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

15. Add another server
Move database to its own server
Load balance
Cluster
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

16. Optimizing Apache
mod_cache
Keep the riff-raff out
Increase MaxClients
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

17. a2enmod cache mem_cache
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

18. Cache static
content in RAM
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

19. Cache static
content in RAM
It’s cheap.
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

20. mod_evasive
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

21. Keep out vulnerability
scanners and attacks
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

22. More resources for
everyone else.
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

23. MaxClients in your httpd.conf
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

24. Trial and error
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

25. Enough to handle
simultaneous connections.
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

26. And RAM is still cheap.
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

28. Optimizing MySQL
Key Buffer
Query Cache
InnoDB
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

29. Key Buffer in my.cnf
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

30. Caches table indexes
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

31. key_buffer_size=128M
20-25% (or so) of available RAM
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

32. Query Buffer in my.cnf
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

33. Caches parsed SELECTs
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

34. query_buffer_size=64M
Half of key_buffer_size
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

35. You get the idea.

36. InnoDB database engine
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

37. Row vs. table locking
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

38. Faster UPDATE
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

39. Optimized for key access
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

40. Faster SELECT & UPDATE
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

41. Optimizing PHP
Upgrade to PHP 5.3
Install an accelerator
Enable output buffering
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

42. PHP 5.3 has mysqlnd
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

43. Native Driver
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

44. Up to 30% faster
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

45. PHP Accelerators
Alternative PHP Cache (APC) : 3x-5x faster
eAccelerator
XCache
Zend Optimizer+
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

46. Output Buffering
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

47. Actually makes code
run slightly slower
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

48. Browser gets
whole page at once
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

49. It certainly feels faster
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009

50. Questions?
davidmichaelross.com
daveross.tel
LAMP Optimization :: Dave Ross :: Suburban Chicago PHP & Web Development Meetup :: SuburbanChicagoPHP.org :: October 1, 2009