diff -u b/modules/testing_bot/files/etc/php5/mods-available/php5.4/apc.ini b/modules/testing_bot/files/etc/php5/mods-available/php5.4/apc.ini
--- b/modules/testing_bot/files/etc/php5/mods-available/php5.4/apc.ini
+++ b/modules/testing_bot/files/etc/php5/mods-available/php5.4/apc.ini
@@ -8,3 +8,4 @@
 apc.num_files_hint = 3000
-; No sure about the total number of user entries
+; As we're not sure about the total number of user entries set to 0 as per PHP
+; manual
 apc.user_entries_hint = 0