View current kernel parameters?

I saw in my syslog kernel.perf_event_max_sample_rate get changed. I was wondering if I could write a quick script to log this variable every few minutes. Currently it is: sysctl -a | grep kernel.perf_event_max_sample_rate In the man page sysctl says > sysctl - configure kernel parameters at runtime Does that mean that my script would get the parameter as it was set when the kernel starts? Would it pick up changes?