I have a server running cacti with 2 cpu & 2 gb memory. It is showing me 100% cpu utilized for some perl scripts getting information from storage luns. memory also 98-99 % utilized. I tried to tune vm.swappiness to 80, as i thought that the memory is less so swapping the pages out may help, but still the performance is killing. kindly let me know wht all parameters can be checked to tune the linux system. I am using nmon tool.