diff --git a/BIND-9-Memory-Explained.md b/BIND-9-Memory-Explained.md
index 438dbd6..c39b48f 100644
--- a/BIND-9-Memory-Explained.md
+++ b/BIND-9-Memory-Explained.md
@@ -98,7 +98,9 @@ MALLOCED: 13.3MiB == 13.3MiB
 The rule of thumb is
 > Don't use the `top` command
 
-There are better tools that are less misleading. There are two tools the are easily available on modern Linux systems - `pmap` and `smem`.
+There are better tools that are less misleading. Most importantly the VIRT value reported by `top` (and VSZ value reported by `ps`) are meaningless.
+
+There are two better tools the are easily available on modern Linux systems - `pmap` and `smem`.
 
 #### pmap