took := time.Since(refreshStart).Seconds()
				if took > maxRefreshDurationSecondsForLog {
					// Log if we took a lot of time.
					logger.Info("Site replication healing refresh took %.2fs", took)
				}

				// wait for 200 millisecond, if we are experience lot of I/O
				waitForLowIO(runtime.GOMAXPROCS(0), 200*time.Millisecond, currentHTTPIO)
			}

		return
	}
	z.SuccessorModTime, err = dc.ReadTime()
	if err != nil {
		err = msgp.WrapError(err, "SuccessorModTime")
		return
	}
	z.Fresh, err = dc.ReadBool()
	if err != nil {
		err = msgp.WrapError(err, "Fresh")
		return
	}
	z.Idx, err = dc.ReadInt()
	if err != nil {
		err = msgp.WrapError(err, "Idx")
		return
	}
	if dc.IsNil() {
		err = dc.ReadNil()