Worked on

while working at Since then I have been working on

at

Gokul N K

Drupal Caching

For DUMMIES

Dwindling Attention Spans

Impatience is a virtue now

Why PERFORMANCE?

A 1 second delay in page response can result in a 7% reduction in

conversions

Source : Akamai.com

In 2010, Google announced that

Website speed would have an impact on search ranking.

Drupal is a database heavy content management system.

Guess how many tables in Drupal7 basic installation

My Blog - 138 Tables

My E-commerce Site

241 Tables

Thumb Rules of Caching

Process Once Use Multiple Times

Live with stale data when possible

Clear Caches infrequently

and keep it very specific

RDBMS is Slow

Key Value database are fast

Page Caching – Performance Page

Block Caching – Block Cache Alter

Aggregate javascript and css files

Disable Un-necessary modules

Cache Views content

Disable DB logging(syslog)

Reduce 404 Errors

Fast 404 Responses

Client Side Validations

Compress Image and lazy loading

Use CSS Sprites

Use Devel Module to watch queries

Rewrite Views Queries/Avoid Views

XHProf

Hhvm, FPM, APC

DB Profiling and Tuning

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

On Server

Varnish for assets

Compress transfer

Keep Alive

Progressive JPEGS

Etags

Use CDNs

Master Slave DB Config

Database Clusters

Load Balancers

Check out

Jeff Eaton's Blog

CACHING IN CODE

“There are two hard things in computer science:

Cache invalidation, Naming things and

Off-by-one errors.”

More complicated than

you could ever imagine.

CACHE INVALIDATION

l Clear All Caches in performance pagel Admin Menul Flush Page Cachel Expirel Cache Actionsl Purge

Cache Clearing Modules

Clear All Caches

Smartest function in D7?

cache_clear_all();

Important Links

http://bit.ly/drupal-caching

Thank you, Gokul