Set<? extends ComputeMetadata> allNodes = awsEC2Context.getComputeService().listNodes();
for (ComputeMetadata node : allNodes) {
String nodeId = node.getProviderId();
String region = getRegion(node.getLocation());
MetricClient metricClient = cloudWatchContext.getApi().getMetricClientForRegion(region);
int metricsCount = getMetricsCountForInstance(cloudWatchContext.getApi(), region, nodeId);
double[] cpuUtilization = getCPUUtilizationStatsForInstanceOverTheLast24Hours(metricClient, nodeId);
String cpuUtilizationHeader = " CPU utilization statistics: ";
DecimalFormat df = new DecimalFormat("#.##");