What is the difference between pm2 restart and pm2 reload
Solution 1:
The difference is documented here:
As opposed to
restart, which kills and restarts the process,reloadachieves a 0-second-downtime reload.
The latter means (found here):
With reload,
pm2restarts all processes one by one, always keeping at least one process running.
It also states that:
If the reload system hasn’t managed to reload your application, a timeout will fallback to a classic restart.