add sortvals after database loaded?

[Phil Pishioneri <pgp@psu.edu>]

Environment:

slapd: openldap-ltb-2.4.42-1.el6.x86_64
config: slapd.conf (file)
database: mdb

After a database has been loaded, can the sortvals option be
added/changed without having to dump and reload the database? The
slapd.conf (and slapd-config) man page doesn't mention any need for a
reload, but wanted to verify.

-Phil