flags += "|" + elt.id;
        });
        return flags.substr(1);
      }

      function refreshChart() {
        if (!chartsReady) return;
        var container = $('#mmu_chart');
        container.css('opacity', '.5');
        refreshChart.count++;
        var seq = refreshChart.count;
        $.getJSON('?mode=plot&flags=' + mmuFlags())
         .fail(function(xhr, status, error) {

		select {
		case <-timer.C:
			// Load all IAM items (except STS creds) periodically.
			refreshStart := time.Now()
			if err := sys.Load(ctx, false); err != nil {
				iamLogIf(ctx, fmt.Errorf("Failure in periodic refresh for IAM (took %.2fs): %v", time.Since(refreshStart).Seconds(), err), logger.WarningKind)
			} else {
				took := time.Since(refreshStart).Seconds()
				if took > maxDurationSecondsForLog {

		select {
		case <-healTimer.C:
			c.RLock()
			enabled := c.enabled
			c.RUnlock()
			if enabled {
				refreshStart := time.Now()
				c.healIAMSystem(ctx, objAPI) // heal IAM system first
				c.healBuckets(ctx, objAPI)   // heal buckets subsequently

				took := time.Since(refreshStart).Seconds()
				if took > maxRefreshDurationSecondsForLog {
					// Log if we took a lot of time.