问题
User postgres is running a process that take all CPUs at 100% usage in a centos machine, the postgresql service is not running so it cannot be a query.
When I try to stop the process it restarts itself. Then name of the process is somewhat strange.
回答1:
Congratulations!
By exposing a database with a weak superuser password to the internet you invited somebody to break in and use your CPU for their own purposes, probably mining crypto-currencies.
Take the machine from the internet, wipe it clean and re-install the operating system.
来源：https://stackoverflow.com/questions/50149034/user-postgres-launches-process-that-takes-all-cpus-100-usage