Samba 4 schema extension - restart needed?

I'm integrating a custom schema in a Samba 4.2 server. This is working quiet well (using ldbmodify) but I wonder if it is necessary to stop the samba service before running ldbmodify. The Samba Wiki says so, also this answer suggests to run smbcontrol all reload-config after running ldbmodify. On the other hand on my test systems it worked pretty well without stopping or reloading samba at all. Still I fear that I could corrupt the ldb files.

So my question is basically: Should I

• just do the ldbmodify?
• run ldbmodify, followed by a smbcontrol all reload-config?
• stop samba, run ldbmodify, start samba?