Add new site in production mode without interrupt other site

Hi everyone,

I’m preparing for a production server to run several sites. For example, I have site A and site B running on prouduction. When I add site C to the same bench, the final step to active site C is reload the nginx (in port port-based or domain based). However, this step will make the site A & B stop during the restart of nginx. Do we have any solution to still maintain the normal operation of site A and B while creating site C?

Best Regards,