Memory used - 48 instances of user nobody - is that normal?

I noted in WHM that nearly all memory is used (more than 90%), at the same time the server and cpu load isn't very high.

What are all those instances of user nobody doing there? - They use more than half of the memory used. Do I need to reboot the server to get rid of this overusage? - This is a new server with not so many accounts on it.

Thanks
John

 

 

 

 

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