I'm consider running some performance profile tools like Cacti for my server, but I'm concerned that running RRDtool or Cacti slow down my servers performance? Is this a valid concern for me? Or rather, how can mitigate this? Can I run the profiling tools on a different server or something?
I suppose another tool to mention here would be Munin, and that leads me to slightly a large questions, is there any huge advantage of using Munin over Cacti? Information is a little sparse online.