cacheInterval:    10 * time.Second,
		metricsGroupOpts: opts,
	}
	mg.RegisterRead(func(ctx context.Context) (metrics []MetricV2) {
		if !mg.metricsGroupOpts.bucketOnly {
			httpStats := globalHTTPStats.toServerHTTPStats(true)
			metrics = make([]MetricV2, 0, 3+
				len(httpStats.CurrentS3Requests.APIStats)+
				len(httpStats.TotalS3Requests.APIStats)+
				len(httpStats.TotalS3Errors.APIStats)+