Since 1 month, After migrating to DO, I'm getting site down issue. Usually it works absolutely fine. Bandwidth usage is also always less than 0.30 MB/s but as soon as I send push notification, it reaches to peak and site becomes down.

So, simply getting issue only at the time of push notification (Currently using onesignal pushnotificaion service), even I Don't have so much subscribers.

Presently, I'm using DO 10$ plan which have 2GB RAM.