Vyos commit behavior when changing vpn l2tp options

Need to understand the commit behavior in case we do changes at vpn l2tp section. I noticed that commit takes 1-2 minutes to apply when active l2tp connections exist on the box.
Could someone explain what happens at the moment of committing vpn l2tp changes? I guess in some (or every?) cases accel-pppd process needs to be restarted which drops all active connections. How this should be done on production system with thousands active connections?

Thank you,