busy period; total operating time
Computing term referring to the total time a system or resource is actively in use or fully operational, as opposed to idle or downtime.
We are monitoring the server's total operating time.
If the total operating time is long, maintenance becomes necessary.
稼働時間 simply means operating time or uptime, while 全稼働時間 emphasizes the total or aggregate operating time, often in a computing context.
Compound of 全 (zen, 'all, total') + 稼働 (kadō, 'operation, work') + 時間 (jikan, 'time'). The exact historical derivation is uncertain; the term is a modern technical compound.