private Collection<Pair<String, NodeMetricSnapshot>> timeseriesAt(int countPerHost, Instant at, String ... hosts) {
        Collection<Pair<String, NodeMetricSnapshot>> timeseries = new ArrayList<>();
        for (int i = 1; i <= countPerHost; i++) {
            for (String host : hosts)
                timeseries.add(new Pair<>(host, new NodeMetricSnapshot(at, new Load(i * 0.1, i * 0.2, i * 0.4, i * 0.5, i * 0.6),
                                                                       i % 100,
                                                                       true,
                                                                       false,
                                                                       0.0)));
        }
        return timeseries;
    }
To update data for the manual test above
node-repository/src/test/java/com/yahoo/vespa/hosted/provision/autoscale/QuestMetricsDbTest.java