var hashPool *sync.Pool

func registerLRUMetrics() {
	if keyIDHashTotalMetricLabels != nil {
		keyIDHashTotalMetricLabels.Clear()
	}
	if keyIDHashStatusLastTimestampSecondsMetricLabels != nil {
		keyIDHashStatusLastTimestampSecondsMetricLabels.Clear()
	}

	keyIDHashTotalMetricLabels = lru.NewWithEvictionFunc(cacheSize, func(key lru.Key, _ interface{}) {
		item := key.(metricLabels)