Redis is an in-memory cache. Without it, every visit makes your site ask its database the same questions again – what the menu is, which posts are on the page, what your settings are. With it, the answers are kept in memory and handed back in a fraction of the time, so pages and the WordPress admin feel quicker, especially on a busy site. Turn it on from your Redis page.
💡 It is yours alone
Your Redis runs in its own container on every server your sites are on, it has its own password, and it is not reachable from the internet or from anybody else’s sites. Nothing is stored on disk: it is a cache, so if it is ever restarted your site simply fills it again.
What it does for you
- Faster pages where the page was waiting on the database.
- A much faster WordPress admin – this is usually the biggest change people notice.
- Less work for the server, so your site copes better when several visitors arrive at once.
It is one price for your whole account, however many sites and servers you have. Nothing renews automatically and we remind you before it ends.
WordPress: one click
- Open your Redis page and add Redis to your account.
- Open the site, go to Usage & add-ons and press Switch Redis on for this site.
- That is all. We install and configure the object cache for you and check the site is still healthy before we finish.
If you ever switch it off we take the plugin, the drop-in file and the settings out again and clear that site’s keys, so the site works exactly as it did before.
Every other kind of site
For Drupal, Joomla, Grav, MediaWiki, PrestaShop and plain PHP hosting the panel shows the exact settings for your software, with the connection details and your site’s own key prefix already filled in, plus a button that shows your password when you need it. Copy them in and clear your cache once.
OpenCart’s own Redis cache cannot send a password, so it cannot be used with a private Redis. A cache extension that supports a password and a socket can.
Questions people ask
- Do my sites share one cache? No. Every site gets its own key prefix, so one site can never read or clear another site’s cache.
- Will it break anything? If the object cache does not come up cleanly we undo the change by ourselves and tell you, and your site keeps serving throughout.
- What if I run out of memory? The cache drops whatever was used least recently. A cache running full is normal, not an error.
- Can I use my own Redis server? Not from here. Sites here reach their Redis through a private socket on the same machine, which is what keeps it fast and closed off.