diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index ef059a234..f1890a501 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -18,6 +18,7 @@
 * FEATURE: vmauth: add support for authorization via [bearer token](https://swagger.io/docs/specification/authentication/bearer-authentication/). See [the docs](https://victoriametrics.github.io/vmauth.html#auth-config) for details.
 * FEATURE: publish `arm64` and `amd64` binaries for cluster version of VictoriaMetrics at [releases page](https://github.com/VictoriaMetrics/VictoriaMetrics/releases).
 
+* BUGFIX: properly handle `/api/v1/labels` and `/api/v1/label/<label_name>/values` queries on big `start ... end` time range. This should fix big resource usage when VictoriaMetrics is queried with [Promxy](https://github.com/jacksontj/promxy) v0.0.62 or newer versions.
 * BUGFIX: vmagent: properly work with simple HTTP proxies which don't support `CONNECT` method. For example, [PushProx](https://github.com/prometheus-community/PushProx). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1179).
 * BUGFIX: vmagent: properly discover targets if multiple namespace selectors are put inside `kubernetes_sd_config`. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1170).
 * BUGFIX: vmagent: properly discover `role: endpoints` and `role: endpointslices` targets in `kubernetes_sd_config`. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1182).
diff --git a/lib/storage/index_db.go b/lib/storage/index_db.go
index eca59a20a..3210b4155 100644
--- a/lib/storage/index_db.go
+++ b/lib/storage/index_db.go
@@ -719,6 +719,9 @@ func (db *indexDB) SearchTagKeysOnTimeRange(tr TimeRange, maxTagKeys int, deadli
 func (is *indexSearch) searchTagKeysOnTimeRange(tks map[string]struct{}, tr TimeRange, maxTagKeys int) error {
 	minDate := uint64(tr.MinTimestamp) / msecPerDay
 	maxDate := uint64(tr.MaxTimestamp) / msecPerDay
+	if minDate > maxDate || maxDate-minDate > maxDaysForPerDaySearch {
+		return is.searchTagKeys(tks, maxTagKeys)
+	}
 	var mu sync.Mutex
 	var wg sync.WaitGroup
 	var errGlobal error
@@ -914,6 +917,9 @@ func (db *indexDB) SearchTagValuesOnTimeRange(tagKey []byte, tr TimeRange, maxTa
 func (is *indexSearch) searchTagValuesOnTimeRange(tvs map[string]struct{}, tagKey []byte, tr TimeRange, maxTagValues int) error {
 	minDate := uint64(tr.MinTimestamp) / msecPerDay
 	maxDate := uint64(tr.MaxTimestamp) / msecPerDay
+	if minDate > maxDate || maxDate-minDate > maxDaysForPerDaySearch {
+		return is.searchTagValues(tvs, tagKey, maxTagValues)
+	}
 	var mu sync.Mutex
 	var wg sync.WaitGroup
 	var errGlobal error
@@ -1126,7 +1132,7 @@ func (db *indexDB) SearchTagValueSuffixes(tr TimeRange, tagKey, tagValuePrefix [
 func (is *indexSearch) searchTagValueSuffixesForTimeRange(tvss map[string]struct{}, tr TimeRange, tagKey, tagValuePrefix []byte, delimiter byte, maxTagValueSuffixes int) error {
 	minDate := uint64(tr.MinTimestamp) / msecPerDay
 	maxDate := uint64(tr.MaxTimestamp) / msecPerDay
-	if maxDate-minDate > maxDaysForDateMetricIDs {
+	if minDate > maxDate || maxDate-minDate > maxDaysForPerDaySearch {
 		return is.searchTagValueSuffixesAll(tvss, tagKey, tagValuePrefix, delimiter, maxTagValueSuffixes)
 	}
 	// Query over multiple days in parallel.
@@ -2673,7 +2679,7 @@ func (is *indexSearch) getMetricIDsForTimeRange(tr TimeRange, maxMetrics int) (*
 	atomic.AddUint64(&is.db.dateMetricIDsSearchCalls, 1)
 	minDate := uint64(tr.MinTimestamp) / msecPerDay
 	maxDate := uint64(tr.MaxTimestamp) / msecPerDay
-	if maxDate-minDate > maxDaysForDateMetricIDs {
+	if minDate > maxDate || maxDate-minDate > maxDaysForPerDaySearch {
 		// Too much dates must be covered. Give up.
 		return nil, errMissingMetricIDsForDate
 	}
@@ -2722,17 +2728,13 @@ func (is *indexSearch) getMetricIDsForTimeRange(tr TimeRange, maxMetrics int) (*
 	return metricIDs, nil
 }
 
-const maxDaysForDateMetricIDs = 40
+const maxDaysForPerDaySearch = 40
 
 func (is *indexSearch) tryUpdatingMetricIDsForDateRange(metricIDs *uint64set.Set, tfs *TagFilters, tr TimeRange, maxMetrics int) error {
 	atomic.AddUint64(&is.db.dateRangeSearchCalls, 1)
 	minDate := uint64(tr.MinTimestamp) / msecPerDay
 	maxDate := uint64(tr.MaxTimestamp) / msecPerDay
-	if maxDate < minDate {
-		// Per-day inverted index doesn't cover the selected date range.
-		return fmt.Errorf("maxDate=%d cannot be smaller than minDate=%d", maxDate, minDate)
-	}
-	if maxDate-minDate > maxDaysForDateMetricIDs {
+	if minDate > maxDate || maxDate-minDate > maxDaysForPerDaySearch {
 		// Too much dates must be covered. Give up, since it may be slow.
 		return errFallbackToGlobalSearch
 	}