How grafana x-axis to show data with 10 seconds

1

in current, the x-axis interval is 1min, how change to 10sec?

grafana version: 5.4.2
datasource: graphite

WX20190221-152824
WX20190221-1528241485×324 48.8 KB

2

change graphite data points to 10s, by default, graphite data point is 60s