diff --git a/servers/slapd/DB_CONFIG b/servers/slapd/DB_CONFIG
index 7977195342aa87fdc60cccf0eee455302a16e97e..cc05b85eed4f14fc295c26b1f1495da37621fa32 100644
--- a/servers/slapd/DB_CONFIG
+++ b/servers/slapd/DB_CONFIG
@@ -10,6 +10,9 @@
 # in particular:
 #   <http://www.openldap.org/faq/index.cgi?file=1075>
 
+# Note: most DB_CONFIG settings will take effect only upon rebuilding
+# the DB environment.
+
 # one 0.25 GB cache
 set_cachesize 0 268435456 1