Perl killing the server... How can I prevent this ?

One of my users has made a Perl script that has an infinite loop. Every now and then the script is executed and slows the server down for as long as I don't manually kill the process. The problem is: I do not know which user and which script...

Does anyone know how I can find it out ?

And does anyone know a program that runs as a cron job and automatically kills such processes ?

 

 

 

 

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