Cache-Control
Cache-Control Install Statistics
Try plugin: Cache-Control
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About Cache-Control
Configurable HTTP Cache-Control response headers for webpages generated by WordPress.Description
Good caching policies is one of performance’s best friends, and it can be your new best friend too. Get friendly with intermediary and browser caches by taking control over your WordPress powered website’s HTTP Cache-Control headers.
This is not a caching plugin in itself, but will enable you to leverage existing standard compliant caching systems better. You can set different policies for different kinds of pages to suite your website’s needs. The Cache-Control for WordPress plugin allows you to set different policies for shared/intermediary and private caches. The plugin sets some sensible defaults for a medium traffic blog that publishes an update or two per week.
You can safely set long Cache-Control times as the max-age values is lowered automatically before a scheduled post is about to be published.
Private pages (logged in users, the admin interface, etc.) will not be cached.
The plugin has extensive documentation.