I have a VPS server from LiquidWeb... it feels like sometimes during the day it's laggy. Since it's 100% virtual, I can't just check "top" to gauge the performance since that is measuring within the VPS. (In other words: if I am never running anything on the VPS, top will always show the same memory use and server load of zero, but because the VPS lives on a shared physical box, it may still fluctuate in speed.)
Is there a way to measure the "real" speed of how the VPS is performing? I was thinking about just hacking a little script that runs a loop (doing something-- file actions, or ??) and logs the time, so I could start to build history... but I'd prefer a more reliable/fundamental stat.