diff --git a/src/docs/user/installation_guide.diviner b/src/docs/user/installation_guide.diviner
--- a/src/docs/user/installation_guide.diviner
+++ b/src/docs/user/installation_guide.diviner
@@ -71,6 +71,7 @@
 
   - **MySQL**: You need MySQL. We strongly recommend MySQL 5.5 or newer.
   - **PHP**: You need PHP 5.2 or newer.
+  - At least 2GB of RAM is recommended.
 
 You'll probably also need a **domain name**. In particular, you should read this
 note: