Struct batchHistogram

prometheus/go_collector_latest.go:463–478

batchHistogram is a mutable histogram that is updated in batches.

// batchHistogram is a mutable histogram that is updated
// in batches.
type batchHistogram struct {
	selfCollector

	// Static fields updated only once.
	desc   *Desc
	hasSum bool

	// Because this histogram operates in batches, it just uses a
	// single mutex for everything. updates are always serialized
	// but Write calls may operate concurrently with updates.
	// Contention between these two sources should be rare.
	mu      sync.Mutex
	buckets []float64 // Inclusive lower bounds, like runtime/metrics.
	counts  []uint64
	sum     float64 // Used if hasSum is true.
}

// newBatchHistogram creates a new batch histogram value with the given
// Desc, buckets, and whether or not it has an exact sum available.