If true, client sends keepalive pings even with no active RPCs. If false, when there are no active RPCs, Time and Timeout will be ignored and no keepalive pings will be sent.
Note that the string type related to time (i.e. timeout, idleConnTimeout, expirationTime) is decimal numbers, each with optional fraction and a unit suffix, such as “300ms”, “1.5h” or “2h45m”. Valid time units are “ns”, “us”, “ms”, “s”, “m”, “h”.