I've noticed several times in the last few weeks that my server is showing very high CPU utilization:     Obviously, the numbers bounce around, but it will stay at this level for a while.   I fired up an SSH session and ran top and it shows me something along these lines: The CPU percentages here add up to around 45% (with some rounding).   What are good ways to track CPU utilization over time so I can determine what is causing these spikes?