2. Agenda
● About Kite Systems and myself
● Performance
● Caching
● Scaling
● Optimizing

4. Kite Systems is an Agile development house
which means the client is actively involved
all the way through the development
process.
We build high quality, secure platforms
using Java J2EE, Microsoft .NET, Ruby on
Rails, PHP and Python.

5. Join Us

6. About myself, Gerald Villorente
● Web Developer/themer at Kite Systems Inc.
● Drupal developer since 2010
● Drupal PH kids mentor

7. Why Drupal is Slow?

8. Performance
● Short response time (milliseconds per page)
● High throughput (rate of processing work,
e.g. page per second)
● Low utilization of computing resources
(CPU, memory, disk, network)

9. Our Objectives
● Improving system performance from what it
is at present
● Faster response to the end user per page
● Handle more page views
● Minimize downtime

10. ● Each objective is different, but they can be
related
● Everyone wants them, but not willing to
PAY!

11. Why Drupal is slow?

12. Why Drupal is slow?
● Drupal is not really slow at all

13. Why Drupal is slow?
● Drupal is not really slow at all
● Server (web server, SQL server)

14. Why Drupal is slow?
● Drupal is not really slow at all
● Server (web server, SQL server)
● Drupal (caching, aggregations, modules,
404)

15. Why Drupal is slow?
● Drupal is not really slow at all
● Server (web server, SQL server)
● Drupal (caching, aggregations, modules,
404)
● Hardware (memory, CPU)
- Shared hosting
- Dedicated/VPS
- Local Development Environment

16. Server: Optimization
● Benchmarking Apache with ab
ab -n 500 -c 50 http://mydomain.com/index.php
Rule of Thumb:
Allocate 50% of the available physical
memory to Apache. So, 250M / 20M per
process = 12 httpd processes maximum.

17. Load Average

18. Demo of Drupal Modules

19. Caching
● Varnish
● Memcache
● Boost
● Drupal Internal Caching

20. Cache Storage

21. Varnish
Varnish is an HTTP accelerator designed for
content-heavy dynamic web sites. In
contrast to other HTTP accelerators, such as
Squid, which began life as a client-side
cache, or Apache and nginx, which are
primarily origin servers, Varnish was
designed as an HTTP accelerator.

22. Varnish

23. APC
The Alternative PHP Cache (APC) is a free
and open opcode cache for PHP. Its goal is
to provide a free, open, and robust
framework for caching and optimizing PHP
intermediate code.

24. APC

25. APC

26. Memcache
Free & open source, high-performance,
distributed memory object caching system,
generic in nature, but intended for use in
speeding up dynamic web applications by
alleviating database load.

27. Memcache

28. Boost
Boost provides static page caching for
Drupal enabling a very significant
performance and scalability boost for sites
that receive mostly anonymous traffic .

29. Boost

30. Scaling
● Load balancer
● Database Cluster