lsphp4 using high CPU

Is it good to change the priority of lsphp proces using spri and if so, which value do you recommend? Still puzzling as to why the cpu still spikes so often.

I don't think the process priority can affect the performance much, as long as the server load is not high and PHP is not in a dead loop, the CPU spikes are normal due to the fact that LiteSpeed only use a handful persistent PHP process to handle all PHP requests.