8 CPU Cores.....only 1 or 2 being used at the same time...

[Tobias Marx]

Is there a way to optimize the usage of all cores better?

top - 21:29:10 up 10 days, 5:03, 1 user, load average: 0.84, 0.87, 0.75
Tasks: 113 total, 1 running, 112 sleeping, 0 stopped, 0 zombie
Cpu0 : 8.0%us, 2.0%sy, 0.0%ni, 88.0%id, 0.0%wa, 0.0%hi, 2.0%si, 0.0%st
Cpu1 : 73.5%us, 26.5%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu4 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu5 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu7 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 4047180k total, 3981920k used, 65260k free, 179476k buffers
Swap: 2040244k total, 128k used, 2040116k free, 2372068k cached