This read-write enumerated object is a one-shot trigger: setting it to 'on' clears the terminal's accumulated performance statistics such as error seconds and BER counters, while reading it back always returns 'off' since it's not a persistent state. An operator uses this after resolving a link problem to zero out the historical counters so future monitoring reflects post-fix performance. For example, after replacing a faulty ODU, a technician might set wvResetPerformance to 'on' to clear the old error-second counts before re-baselining the link.