how to disable "postgres - PostgreSQL" ?

#1
I noticed when running the "top" command that postmaster was running from the user postgres and that is associated with PostgreSQL which I don't even use.

30302 postgres 16 0 16740 524 160 S 0 0.2 0:06.97 postmaster
30311 postgres 22 0 7540 612 4 S 0 0.2 0:00.20 postmaster
30312 postgres 18 0 6548 408 4 S 0 0.1 0:01.25 postmaster

Is there a way to safely stop the service without uninstalling it?

Regards,
 
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