Go to “plugins” then the “add new” subheadingType “W3 Total Cache” in the “Search Plugins” field andpress enter.
Find the correct plugin and installW3 Total Cache will install, then click activate
Possible Issues• It’s possible that a warning box about wp-content needing to be 777 or 755. Inorder to remedy this you must change permissions, which must be done in thecpanel of your server. Our server is bluehost, so here is an example.
Right Click wp-content and select change permissionsChange permissions to whatever is required: either777 or 775. If you must change to 777, then changeback to 775 after install is complete.
Go to the Performance menu on the sidebar admin panelHover over Performance and go to General Settings
Once in the General Settings make sure Preview Mode is Disabled.This option will typically be at the top of the screen here.
Ensure that the following boxes are checked (enabled): PageCache, Object Cache, and Browser CacheDo not worry about the other settingsright now
Go to either the sidebar admin panel or the top of the W3 page and go toPage Cache and the General sectionEnsure the following options are enabled: “Cache Feeds:site, categories, tags, comments”, “Cache SSL (https)requests”, “Cache requests only for *your sitename]hostname”, and “Don’t cache pages for logged in users”
Next is the Cache Preload section under General. This is for priming or preloadingthe most important pages.Check the box to enable then change “Update Interval” to 900and “Pages Per Interval” to 10. Also add your sitemap whichshould be, “*your sitename+/sitemap.xml”
Setting the Garbage Collection Interval depends on the amount of traffic toyour site. The busier the site the lower the interval. We’re going to use thedefault 3600It is important to clear cache or you may run out of disk space. That’s theimportance of setting this interval correctly.
Now go to Browser Cache on the sidebar admin panelCheck the following options: ”, “Set Last-ModifiedHeader”, “Set Expires Header”, “Set Cache ControlHeader”, “Set Entity Tag (eTag)”, “Set W3 Total CacheHeader”, “Enable HTTP (gzip) Compression”, “Prevent Cachingof Objects After Setting Change”
Set Expires Header at the following: CSS & JS(31536000) whichis a year, HTML & XML(3600) which is an hour, Media & OtherFiles(31536000) which is a year.
Set Cache Control Header. A good default is:“cache with max-age (“max-age=EXPIRES_SECONDS, public, must-revalidate, proxy-revalidate”)Set Cache Control Header for each of the 3 categories: CSS & JS, HTML & XML, andMedia & Other Files
This guide didn’t touch on every aspect of W3 Total Cache but these settings willhelp to greatly increase the speed of your site and pages.