The document discusses various techniques for optimizing performance and scaling WordPress sites. It covers caching at the disk, memory, page, and object levels. It also discusses scaling strategies like using multiple web and database servers, database sharding, file syncing, and caching technologies like Memcached. Specific caching plugins like Batcache and W3TC are mentioned. Coding best practices like using transients and the WordPress APIs are recommended to optimize performance.

1. Performance,
Optimization &
Scaling

2. Pete Mall
Slacking Contributing Developer
Consultant
wclv@petemall.com

3. Matt Martz
Slacking Contributing Developer
Senior Linux Systems Engineer
matt@sivel.net

4. Caching Techniques
Disk vs Memory
Object vs Page
Opcode
Client Side

5. Shared Hosting
Disk Caching
Client Side Caching
Look for a host with Opcode caching

6. Planning to Scale
Technologies that work in multi server
environments
File Storage
Database Sharding

7. Single Server
Opcode
Object Caching (APC vs Memcached)
Page Caching
Fragment Caching

8. 2 Server
One Web Server
One Database Server
Database Server dual purpose with
Memcached

9. Multi Server
Multiple Web Servers
Multiple Database Servers (HyperDB)
Memcached Servers
File Syncing (NFS, Replication?)

10. HyperDB
Split Reads and Writes
Sharding
Battle Tested ( WordPress.com)

11. nginx vs nginx + Apache
nginx + php-fpm (fastcgi)
nginx reverse proxy (caching?)
Apache + php (mod_php, suPHP?)

12. Batcache vs W3TC
More Advanced Caching Configuration
The Kitchen sink vs the toaster

13. Coding Best Practices
Optimize Code
Use the WordPress APIs
Transients - Use them
Object Cache
Don’t over Engineer

14. Q &A