kill_top_process.py

#!/usr/bin/env python3
 
import psutil
import time
 
if __name__ == "__main__":
    while True:
        procs = []
 
        for proc in psutil.process_iter():
            pinfo = proc.as_dict(attrs=['pid', 'name'])
            try:
                pinfo['mem%'] = proc.memory_percent()
            except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
                pass
            else:
                procs.append(pinfo)
 
        total = sum((p['mem%'] for p in procs))
 
        if total > 99:
            top = max(procs, key=lambda p: p['mem%'])
            print(f"killing {top['name']}...")
            try:
                psutil.Process(top['pid']).kill()
            except (psutil.NoSuchProcess, psutil.AccessDenied):
                pass
 
        time.sleep(20)