diff --git a/examples/config.rb b/examples/config.rb
index 6d550493..8bae9b66 100644
--- a/examples/config.rb
+++ b/examples/config.rb
@@ -104,7 +104,8 @@
 
 # === Cluster mode ===
 
-# How many worker processes to run.
+# How many worker processes to run.  Typically this is set to
+# to the number of available cores.
 #
 # The default is "0".
 #