iRule send CPU utilization to 100%

I don't know about the profiles, but see if this helps:

when HTTP_REQUEST {
    HTTP::respond 200 content {
         "Site unavailable
    
    
    
    System Maintenance
    Argos is down for some emergency maintenance.  We apologize for the inconvenience.  At this time we expect Argos to be back up and running by 1 pm on Wednesday, January 28.
    "
         } "Connection" "Close"

     event disable all
     return
}