We observed the high memory issues on our droplet through monitoring and while checking we are not able to ssh from ssh client but able to ssh from digitalocean web console. We restarted the services to make memory usage back to normal and still droplet is not reachable ( reboot the system as well due to system restart required message). On observing further we see that DNS is resolving the hostnames and not able to ping our droplet with IP or hostname. We see DNS related messages on journalctl -xe
Can you please help us in resolving the issue
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