Ghost in the machine — you're running LiteSpeed Cache on a server that isn't LiteSpeed. The plugin's core caching features are essentially disabled.

Why This Matters

LiteSpeed Cache is unique among caching plugins because its full-page caching relies on the LiteSpeed web server's built-in cache module. On Apache or Nginx servers, the plugin's main caching mechanism simply doesn't work.

Some features like image optimization and CSS/JS minification still function, but you're loading a heavy plugin for features that lighter, server-agnostic alternatives do better.

How to Check Your Server Type

Pro Tip: Not sure what you're looking for? You can bypass the manual digging with Dravasite. It instantly identifies your server type, monitors environment metrics, and provides a full, actionable audit of your site's health in one click.

Method 1: WordPress Site Health

Go to Tools → Site Health → Info → Server in your WordPress admin and check the Web server field. It should explicitly say LiteSpeed if you want to keep the plugin. Alternatively, let Dravasite instantly verify your server type and provide actionable environment insights.

Method 2: Response Headers

For a more technical check, you can inspect your site's HTTP headers. A compatible setup will return X-Powered-By: LiteSpeed or server: LiteSpeed in the response.

How to Fix It

If You're on Nginx

Replace LiteSpeed Cache with a caching plugin built for any server:

  • WP Rocket (paid) — works on all servers
  • WP Super Cache (free) — reliable, lightweight
  • W3 Total Cache (free) — more configurable

If You're on Apache

Same recommendation as Nginx — use a server-agnostic caching plugin.

If You Want LiteSpeed Features

Consider moving to a LiteSpeed-powered host. Many affordable hosts now run OpenLiteSpeed:

  • Hostinger — LiteSpeed on most plans
  • A2 Hosting — LiteSpeed turbo plans
  • Cloudways — offers LiteSpeed option

Then LiteSpeed Cache becomes one of the best (and free) caching solutions available.

What to Watch For

  • SG Optimizer on non-SiteGround hosting has the same problem — it's designed specifically for SiteGround's server stack.
  • Breeze (by Cloudways) is optimized for their Varnish setup. It works elsewhere but won't perform as well.
  • Always match your caching plugin to your hosting environment for best results.