cpuMetrics          *cachevalue.Cache[madmin.CPUMetrics]
	clusterDriveMetrics *cachevalue.Cache[storageMetrics]
	nodesUpDown         *cachevalue.Cache[nodesOnline]
}

func newMetricsCache() *metricsCache {
	return &metricsCache{
		dataUsageInfo:       newDataUsageInfoCache(),
		esetHealthResult:    newESetHealthResultCache(),
		driveMetrics:        newDriveMetricsCache(),

	// map for bucket metrics and handle them specially.

	// Add the serverName and poolIndex labels to all non-cluster metrics.
	//
	// Also create metric group maps and set the cache.
	metricsCache := newMetricsCache()
	mgMap := make(map[collectorPath]*MetricsGroup)
	bucketMGMap := make(map[collectorPath]*MetricsGroup)
	for _, mg := range allMetricGroups {
		if !strings.HasPrefix(string(mg.CollectorPath), clusterBasePath) {