Simple Steps to improve the performance of your site, in the increasing order of complexity.

3. Worked on
while working at
Since then I have been working on
at
Gokul N K

4. Drupal Caching
For DUMMIES

5. Dwindling Attention Spans
Impatience is a virtue now
Why PERFORMANCE?

7. A 1 second delay in page response
can result in a 7% reduction in
conversions
Source : Akamai.com

8. In 2010, Google announced that
Website speed would have an
impact on search ranking.

10. Drupal is a database heavy
content management system.
Guess how many tables in
Drupal7 basic installation

11. My Blog - 138 Tables
My E-commerce Site
241 Tables

12. Thumb Rules of Caching

13. Process Once Use Multiple Times

14. Live with stale data when possible

15. Clear Caches infrequently
and keep it very specific

16. RDBMS is Slow
Key Value database are fast

18. Page Caching – Performance Page
Block Caching – Block Cache Alter
Aggregate javascript and css files
Disable Un-necessary modules
Cache Views content

19. Disable DB logging(syslog)
Reduce 404 Errors
Fast 404 Responses
Client Side Validations
Compress Image and lazy loading
Use CSS Sprites

20. Use Devel Module to watch queries
Rewrite Views Queries/Avoid Views
XHProf
Hhvm, FPM, APC
DB Profiling and Tuning

21. Use Boost, don't Boot-strap DB
If your cache tables are huge
use memcached
Use Reverse Proxy Server
Use heiuristing Cache Clearing
Implement Cache Warming

22. On Server
Varnish for assets
Compress transfer
Keep Alive
Progressive JPEGS
Etags

23. Use CDNs
Master Slave DB Config
Database Clusters
Load Balancers

24. Check out
Jeff Eaton's Blog
CACHING IN CODE

29. “There are two hard things in
computer science:
Cache invalidation, Naming things
and
Off-by-one errors.”

30. More complicated than
you could ever imagine.
CACHE INVALIDATION

31. l Clear All Caches in performance page
l Admin Menu
l Flush Page Cache
l Expire
l Cache Actions
l Purge
Cache Clearing Modules

32. Clear All Caches

33. Smartest function in D7?
cache_clear_all();

34. Important Links
http://bit.ly/drupal-
caching

35. Thank you, Gokul