etcdserver/api/v2stats/server.go
func (ss *ServerStats) SendAppendReq(reqSize int) {
	ss.Lock()
	defer ss.Unlock()

	ss.becomeLeader()

	ss.sendRateQueue.Insert(
		&RequestStats{
			SendingTime: time.Now(),
			Size:        reqSize,
		},
	)

	ss.SendAppendRequestCnt++
}
func (ss *ServerStats) SendAppendReq(reqSize int) {
	ss.Lock()
	defer ss.Unlock()

	ss.becomeLeader()

	ss.sendRateQueue.Insert(
		&RequestStats{
			SendingTime: time.Now(),
			Size:        reqSize,
		},
	)

	ss.SendAppendRequestCnt++
}
// SendAppendReq updates the ServerStats in response to an AppendRequest
// being sent by this server