The total footprint of the sensor on disk combined with what is in memory is approximately 2MB. The sensor typically runs under 1% CPU.
Depending on what actions you may be performing it may increase (e.g. if you’re doing a full YARA scan it’s expected that the CPU usage will increase). When you use our YARA trickle scan, that also keeps CPU usage within reasonable bounds. You’ll only see YARA scans spike CPU when you do a full manual scan.