1 files changed, 7 insertions, 0 deletions

diff --git a/etc/sysctl.conf b/etc/sysctl.conf
index e3b25b99567c..93758e1ced07 100644
--- a/etc/sysctl.conf
+++ b/etc/sysctl.conf
@@ -3,3 +3,10 @@
 #  This file is read when going to multi-user and its contents piped thru
 #  ``sysctl -w'' to adjust kernel values.  ``man 5 sysctl.conf'' for details.
 #
+
+vfs.vmiodirenable=0	# Set to 1 to enable the use of the VM subsystem to
+			# back UFS directory memory requirements. Because of
+			# the amount of wasted memory this causes it's not
+			# advised for machines with less than 64MB of RAM, but
+			# on machines with more than 64MB it can provide a
+			# substantial benefit related to directory caching