15/03/10

Caching

Browser caches

 Cache hit: when a request can be satisfied from the cache
    - fast hit
    - slow hit

 Cache miss: whena  request cannot be satisfied from the cache
  - compulsory miss
  - consistency miss

Headers

Module: mod_expires
Directives: ExpiresActive On
	    ExpiresDefault "access plus 1 day"
            ExpiresByType image/gif "modification plus 1 year"

Using mod_headers, you can also send out a Cache-control
header, which influences what caches will do with the response:
Cache-control: max-age=90, .......
  no-cache
  no-store
  private
  public
  must-revalidate
  ...