Merge pull request #43 from matttproud/refactor/telemetry/refresh

Upgrade Prometheus to new API.

retrieval/instrumentation.go

@@ -19,23 +19,29 @@ import (
 	"github.com/matttproud/golang_instrumentation/metrics"
 )
 
+const (
+	address     = "instance"
+	alive       = "alive"
+	failure     = "failure"
+	outcome     = "outcome"
+	state       = "state"
+	success     = "success"
+	unreachable = "unreachable"
+)
+
 var (
 	networkLatencyHistogram = &metrics.HistogramSpecification{
 		Starts:                metrics.LogarithmicSizedBucketsFor(0, 1000),
-		BucketMaker:           metrics.AccumulatingBucketBuilder(metrics.EvictAndReplaceWith(10, maths.Average), 100),
+		BucketBuilder:         metrics.AccumulatingBucketBuilder(metrics.EvictAndReplaceWith(10, maths.Average), 100),
 		ReportablePercentiles: []float64{0.01, 0.05, 0.5, 0.90, 0.99},
 	}
 
-	targetsHealthy   = &metrics.CounterMetric{}
+	targetOperationLatencies = metrics.NewHistogram(networkLatencyHistogram)
-	targetsUnhealthy = &metrics.CounterMetric{}
 
-	scrapeLatencyHealthy   = metrics.CreateHistogram(networkLatencyHistogram)
+	targetOperations = metrics.NewCounter()
-	scrapeLatencyUnhealthy = metrics.CreateHistogram(networkLatencyHistogram)
 )
 
 func init() {
-	registry.Register("targets_healthy_total", "Total number of healthy scrape targets", map[string]string{}, targetsHealthy)
+	registry.Register("prometheus_target_operations_total", "The total numbers of operations of the various targets that are being monitored.", registry.NilLabels, targetOperations)
-	registry.Register("targets_unhealthy_total", "Total number of unhealthy scrape targets", map[string]string{}, targetsUnhealthy)
+	registry.Register("prometheus_target_operation_latency_ms", "The latencies for various target operations.", registry.NilLabels, targetOperationLatencies)
-	registry.Register("targets_healthy_scrape_latency_ms", "Scrape latency for healthy targets in milliseconds", map[string]string{}, scrapeLatencyHealthy)
-	registry.Register("targets_unhealthy_scrape_latency_ms", "Scrape latency for unhealthy targets in milliseconds", map[string]string{}, scrapeLatencyUnhealthy)
 }

retrieval/target.go

@@ -235,11 +235,13 @@ func (t *target) Scrape(earliest time.Time, results chan Result) (err error) {
 
 	accumulator := func(d time.Duration) {
 		ms := float64(d) / float64(time.Millisecond)
-		if err == nil {
+		labels := map[string]string{address: t.Address(), outcome: success}
-			scrapeLatencyHealthy.Add(ms)
+		if err != nil {
-		} else {
+			labels[outcome] = failure
-			scrapeLatencyUnhealthy.Add(ms)
 		}
+
+		targetOperationLatencies.Add(labels, ms)
+		targetOperations.Increment(labels)
 	}
 
 	go metrics.InstrumentCall(request, accumulator)

storage/metric/leveldb/instrumentation.go

@@ -17,20 +17,56 @@ import (
 	"github.com/matttproud/golang_instrumentation"
 	"github.com/matttproud/golang_instrumentation/maths"
 	"github.com/matttproud/golang_instrumentation/metrics"
+	"time"
+)
+
+const (
+	operation = "operation"
+	success   = "success"
+	failure   = "failure"
+	result    = "result"
+
+	appendFingerprints          = "append_fingerprints"
+	appendLabelNameFingerprint  = "append_label_name_fingerprint"
+	appendLabelPairFingerprint  = "append_label_pair_fingerprint"
+	appendSample                = "append_sample"
+	getBoundaryValues           = "get_boundary_values"
+	getFingerprintsForLabelName = "get_fingerprints_for_label_name"
+	getFingerprintsForLabelSet  = "get_fingerprints_for_labelset"
+	getLabelNameFingerprints    = "get_label_name_fingerprints"
+	getMetricForFingerprint     = "get_metric_for_fingerprint"
+	getRangeValues              = "get_range_values"
+	getValueAtTime              = "get_value_at_time"
+	hasIndexMetric              = "has_index_metric"
+	hasLabelName                = "has_label_name"
+	hasLabelPair                = "has_label_pair"
+	indexMetric                 = "index_metric"
+	setLabelNameFingerprints    = "set_label_name_fingerprints"
+	setLabelPairFingerprints    = "set_label_pair_fingerprints"
 )
 
 var (
 	diskLatencyHistogram = &metrics.HistogramSpecification{
 		Starts:                metrics.LogarithmicSizedBucketsFor(0, 5000),
-		BucketMaker:           metrics.AccumulatingBucketBuilder(metrics.EvictAndReplaceWith(10, maths.Average), 100),
+		BucketBuilder:         metrics.AccumulatingBucketBuilder(metrics.EvictAndReplaceWith(10, maths.Average), 100),
 		ReportablePercentiles: []float64{0.01, 0.05, 0.5, 0.90, 0.99},
 	}
 
-	targetsHealthy = &metrics.CounterMetric{}
+	storageOperations = metrics.NewCounter()
-
+	storageLatency    = metrics.NewHistogram(diskLatencyHistogram)
-	appendLatency = metrics.CreateHistogram(diskLatencyHistogram)
 )
 
-func init() {
+func recordOutcome(counter metrics.Counter, latency metrics.Histogram, duration time.Duration, err error, success, failure map[string]string) {
-	registry.Register("sample_append_disk_latency_microseconds", "Latency for sample appends to disk in microseconds", map[string]string{}, appendLatency)
+	labels := success
+	if err != nil {
+		labels = failure
+	}
+
+	counter.Increment(labels)
+	latency.Add(labels, float64(duration/time.Microsecond))
+}
+
+func init() {
+	registry.Register("prometheus_metric_disk_operations_total", "Total number of metric-related disk operations.", registry.NilLabels, storageOperations)
+	registry.Register("prometheus_metric_disk_latency_microseconds", "Latency for metric disk operations in microseconds.", registry.NilLabels, storageLatency)
 }

storage/metric/leveldb/mutable.go

@@ -15,8 +15,6 @@ package leveldb
 
 import (
 	"code.google.com/p/goprotobuf/proto"
-	registry "github.com/matttproud/golang_instrumentation"
-	"github.com/matttproud/golang_instrumentation/metrics"
 	"github.com/matttproud/prometheus/coding"
 	"github.com/matttproud/prometheus/coding/indexable"
 	"github.com/matttproud/prometheus/model"
@@ -24,29 +22,48 @@ import (
 	"time"
 )
 
-var (
+func (l *LevelDBMetricPersistence) setLabelPairFingerprints(labelPair *dto.LabelPair, fingerprints *dto.FingerprintCollection) (err error) {
-	appendSuccessCount = &metrics.CounterMetric{}
+	begin := time.Now()
-	appendFailureCount = &metrics.CounterMetric{}
-)
 
-func init() {
+	defer func() {
-	registry.Register("sample_append_success_count_total", "Total successfully appended samples", map[string]string{}, appendSuccessCount)
+		duration := time.Now().Sub(begin)
-	registry.Register("sample_append_failure_count_total", "Total sample append failures", map[string]string{}, appendFailureCount)
+
-}
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: setLabelPairFingerprints, result: success}, map[string]string{operation: setLabelPairFingerprints, result: failure})
+	}()
 
-func (l *LevelDBMetricPersistence) setLabelPairFingerprints(labelPair *dto.LabelPair, fingerprints *dto.FingerprintCollection) error {
 	labelPairEncoded := coding.NewProtocolBufferEncoder(labelPair)
 	fingerprintsEncoded := coding.NewProtocolBufferEncoder(fingerprints)
-	return l.labelSetToFingerprints.Put(labelPairEncoded, fingerprintsEncoded)
+	err = l.labelSetToFingerprints.Put(labelPairEncoded, fingerprintsEncoded)
+
+	return
 }
 
-func (l *LevelDBMetricPersistence) setLabelNameFingerprints(labelName *dto.LabelName, fingerprints *dto.FingerprintCollection) error {
+func (l *LevelDBMetricPersistence) setLabelNameFingerprints(labelName *dto.LabelName, fingerprints *dto.FingerprintCollection) (err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: setLabelNameFingerprints, result: success}, map[string]string{operation: setLabelNameFingerprints, result: failure})
+	}()
+
 	labelNameEncoded := coding.NewProtocolBufferEncoder(labelName)
 	fingerprintsEncoded := coding.NewProtocolBufferEncoder(fingerprints)
-	return l.labelNameToFingerprints.Put(labelNameEncoded, fingerprintsEncoded)
+
+	err = l.labelNameToFingerprints.Put(labelNameEncoded, fingerprintsEncoded)
+
+	return
 }
 
 func (l *LevelDBMetricPersistence) appendLabelPairFingerprint(labelPair *dto.LabelPair, fingerprint *dto.Fingerprint) (err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: appendLabelPairFingerprint, result: success}, map[string]string{operation: appendLabelPairFingerprint, result: failure})
+	}()
+
 	has, err := l.HasLabelPair(labelPair)
 	if err != nil {
 		return
@@ -64,10 +81,20 @@ func (l *LevelDBMetricPersistence) appendLabelPairFingerprint(labelPair *dto.Lab
 
 	fingerprints.Member = append(fingerprints.Member, fingerprint)
 
-	return l.setLabelPairFingerprints(labelPair, fingerprints)
+	err = l.setLabelPairFingerprints(labelPair, fingerprints)
+
+	return
 }
 
 func (l *LevelDBMetricPersistence) appendLabelNameFingerprint(labelPair *dto.LabelPair, fingerprint *dto.Fingerprint) (err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: appendLabelNameFingerprint, result: success}, map[string]string{operation: appendLabelNameFingerprint, result: failure})
+	}()
+
 	labelName := &dto.LabelName{
 		Name: labelPair.Name,
 	}
@@ -89,10 +116,20 @@ func (l *LevelDBMetricPersistence) appendLabelNameFingerprint(labelPair *dto.Lab
 
 	fingerprints.Member = append(fingerprints.Member, fingerprint)
 
-	return l.setLabelNameFingerprints(labelName, fingerprints)
+	err = l.setLabelNameFingerprints(labelName, fingerprints)
+
+	return
 }
 
 func (l *LevelDBMetricPersistence) appendFingerprints(m *dto.Metric) (err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: appendFingerprints, result: success}, map[string]string{operation: appendFingerprints, result: failure})
+	}()
+
 	fingerprintDTO, err := model.MessageToFingerprintDTO(m)
 	if err != nil {
 		return
@@ -140,17 +177,13 @@ func (l *LevelDBMetricPersistence) appendFingerprints(m *dto.Metric) (err error)
 }
 
 func (l *LevelDBMetricPersistence) AppendSample(sample *model.Sample) (err error) {
+	begin := time.Now()
 	defer func() {
-		var m *metrics.CounterMetric = appendSuccessCount
+		duration := time.Now().Sub(begin)
 
-		if err != nil {
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: appendSample, result: success}, map[string]string{operation: appendSample, result: failure})
-			m = appendFailureCount
-		}
-
-		m.Increment()
 	}()
 
-	operation := func() {
 	metricDTO := model.SampleToMetricDTO(sample)
 
 	indexHas, err := l.hasIndexMetric(metricDTO)
@@ -189,15 +222,6 @@ func (l *LevelDBMetricPersistence) AppendSample(sample *model.Sample) (err error
 	if err != nil {
 		return
 	}
-	}
-
-	// XXX: Problematic with panics.
-	accumulator := func(d time.Duration) {
-		ms := float64(d) / float64(time.Microsecond)
-		appendLatency.Add(ms)
-	}
-
-	metrics.InstrumentCall(operation, accumulator)
 
 	return
 }

storage/metric/leveldb/reading.go

@@ -15,8 +15,6 @@ package leveldb
 
 import (
 	"code.google.com/p/goprotobuf/proto"
-	registry "github.com/matttproud/golang_instrumentation"
-	"github.com/matttproud/golang_instrumentation/metrics"
 	"github.com/matttproud/prometheus/coding"
 	"github.com/matttproud/prometheus/coding/indexable"
 	"github.com/matttproud/prometheus/model"
@@ -26,33 +24,6 @@ import (
 	"time"
 )
 
-var (
-	getLabelNameFingerprintsSuccessCount    = &metrics.CounterMetric{}
-	getLabelNameFingerprintsFailureCount    = &metrics.CounterMetric{}
-	getFingerprintsForLabelSetSuccessCount  = &metrics.CounterMetric{}
-	getFingerprintsForLabelSetFailureCount  = &metrics.CounterMetric{}
-	getFingerprintsForLabelNameSuccessCount = &metrics.CounterMetric{}
-	getFingerprintsForLabelNameFailureCount = &metrics.CounterMetric{}
-	getMetricForFingerprintSuccessCount     = &metrics.CounterMetric{}
-	getMetricForFingerprintFailureCount     = &metrics.CounterMetric{}
-	getBoundaryValuesSuccessCount           = &metrics.CounterMetric{}
-	getBoundaryValuesFailureCount           = &metrics.CounterMetric{}
-)
-
-func init() {
-	registry.Register("get_label_name_fingerprints_success_count_total", "Successfully fetched label name fingerprints", map[string]string{}, getLabelNameFingerprintsSuccessCount)
-	registry.Register("get_label_name_fingerprints_failure_count_total", "Failures while fetching label name fingerprints", map[string]string{}, getLabelNameFingerprintsFailureCount)
-
-	registry.Register("get_fingerprints_for_label_set_success_count_total", "Successfully fetched label set fingerprints", map[string]string{}, getFingerprintsForLabelSetSuccessCount)
-	registry.Register("get_fingerprints_for_label_set_failure_count_total", "Failures while fetching label set fingerprints", map[string]string{}, getFingerprintsForLabelSetFailureCount)
-	registry.Register("get_fingerprints_for_label_name_success_count_total", "Successfully fetched label name fingerprints", map[string]string{}, getFingerprintsForLabelNameSuccessCount)
-	registry.Register("get_fingerprints_for_label_name_failure_count_total", "Failures while fetching label name fingerprints", map[string]string{}, getFingerprintsForLabelNameFailureCount)
-	registry.Register("get_metric_for_fingerprint_success_count_total", "Successfully fetched metrics by fingerprint", map[string]string{}, getMetricForFingerprintSuccessCount)
-	registry.Register("get_metric_for_fingerprint_failure_count_total", "Failures while fetching metrics by fingerprint", map[string]string{}, getMetricForFingerprintFailureCount)
-	registry.Register("get_boundary_values_success_count_total", "Successfully fetched metric boundary values", map[string]string{}, getBoundaryValuesSuccessCount)
-	registry.Register("get_boundary_values_failure_count_total", "Failures while fetching boundary values", map[string]string{}, getBoundaryValuesFailureCount)
-}
-
 func extractSampleKey(i iterator) (k *dto.SampleKey, err error) {
 	k = &dto.SampleKey{}
 	err = proto.Unmarshal(i.Key(), k)
@@ -105,27 +76,75 @@ func keyIsAtMostOld(t time.Time) sampleKeyPredicate {
 	}
 }
 
-func (l *LevelDBMetricPersistence) hasIndexMetric(dto *dto.Metric) (bool, error) {
+func (l *LevelDBMetricPersistence) hasIndexMetric(dto *dto.Metric) (value bool, err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: hasIndexMetric, result: success}, map[string]string{operation: hasIndexMetric, result: failure})
+	}()
+
 	dtoKey := coding.NewProtocolBufferEncoder(dto)
-	return l.metricMembershipIndex.Has(dtoKey)
+	value, err = l.metricMembershipIndex.Has(dtoKey)
+
+	return
 }
 
-func (l *LevelDBMetricPersistence) indexMetric(dto *dto.Metric) error {
+func (l *LevelDBMetricPersistence) indexMetric(dto *dto.Metric) (err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: indexMetric, result: success}, map[string]string{operation: indexMetric, result: failure})
+	}()
+
 	dtoKey := coding.NewProtocolBufferEncoder(dto)
-	return l.metricMembershipIndex.Put(dtoKey)
+	err = l.metricMembershipIndex.Put(dtoKey)
+
+	return
 }
 
-func (l *LevelDBMetricPersistence) HasLabelPair(dto *dto.LabelPair) (bool, error) {
+func (l *LevelDBMetricPersistence) HasLabelPair(dto *dto.LabelPair) (value bool, err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: hasLabelPair, result: success}, map[string]string{operation: hasLabelPair, result: failure})
+	}()
+
 	dtoKey := coding.NewProtocolBufferEncoder(dto)
-	return l.labelSetToFingerprints.Has(dtoKey)
+	value, err = l.labelSetToFingerprints.Has(dtoKey)
+
+	return
 }
 
-func (l *LevelDBMetricPersistence) HasLabelName(dto *dto.LabelName) (bool, error) {
+func (l *LevelDBMetricPersistence) HasLabelName(dto *dto.LabelName) (value bool, err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: hasLabelName, result: success}, map[string]string{operation: hasLabelName, result: failure})
+	}()
+
 	dtoKey := coding.NewProtocolBufferEncoder(dto)
-	return l.labelNameToFingerprints.Has(dtoKey)
+	value, err = l.labelNameToFingerprints.Has(dtoKey)
+
+	return
 }
 
 func (l *LevelDBMetricPersistence) getFingerprintsForLabelSet(p *dto.LabelPair) (c *dto.FingerprintCollection, err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: getFingerprintsForLabelSet, result: success}, map[string]string{operation: getFingerprintsForLabelSet, result: failure})
+	}()
+
 	dtoKey := coding.NewProtocolBufferEncoder(p)
 	get, err := l.labelSetToFingerprints.Get(dtoKey)
 	if err != nil {
@@ -140,13 +159,12 @@ func (l *LevelDBMetricPersistence) getFingerprintsForLabelSet(p *dto.LabelPair)
 
 // XXX: Delete me and replace with GetFingerprintsForLabelName.
 func (l *LevelDBMetricPersistence) GetLabelNameFingerprints(n *dto.LabelName) (c *dto.FingerprintCollection, err error) {
-	defer func() {
+	begin := time.Now()
-		m := getLabelNameFingerprintsSuccessCount
-		if err != nil {
-			m = getLabelNameFingerprintsFailureCount
-		}
 
-		m.Increment()
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: getLabelNameFingerprints, result: success}, map[string]string{operation: getLabelNameFingerprints, result: failure})
 	}()
 
 	dtoKey := coding.NewProtocolBufferEncoder(n)
@@ -162,13 +180,12 @@ func (l *LevelDBMetricPersistence) GetLabelNameFingerprints(n *dto.LabelName) (c
 }
 
 func (l *LevelDBMetricPersistence) GetFingerprintsForLabelSet(labelSet *model.LabelSet) (fps []*model.Fingerprint, err error) {
-	defer func() {
+	begin := time.Now()
-		m := getFingerprintsForLabelSetSuccessCount
-		if err != nil {
-			m = getFingerprintsForLabelSetFailureCount
-		}
 
-		m.Increment()
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: getFingerprintsForLabelSet, result: success}, map[string]string{operation: getFingerprintsForLabelSet, result: failure})
 	}()
 
 	sets := []utility.Set{}
@@ -214,13 +231,12 @@ func (l *LevelDBMetricPersistence) GetFingerprintsForLabelSet(labelSet *model.La
 }
 
 func (l *LevelDBMetricPersistence) GetFingerprintsForLabelName(labelName *model.LabelName) (fps []*model.Fingerprint, err error) {
-	defer func() {
+	begin := time.Now()
-		m := getFingerprintsForLabelNameSuccessCount
-		if err != nil {
-			m = getFingerprintsForLabelNameFailureCount
-		}
 
-		m.Increment()
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: getFingerprintsForLabelName, result: success}, map[string]string{operation: getFingerprintsForLabelName, result: failure})
 	}()
 
 	fps = make([]*model.Fingerprint, 0, 0)
@@ -246,13 +262,12 @@ func (l *LevelDBMetricPersistence) GetFingerprintsForLabelName(labelName *model.
 }
 
 func (l *LevelDBMetricPersistence) GetMetricForFingerprint(f *model.Fingerprint) (m *model.Metric, err error) {
-	defer func() {
+	begin := time.Now()
-		m := getMetricForFingerprintSuccessCount
-		if err != nil {
-			m = getMetricForFingerprintFailureCount
-		}
 
-		m.Increment()
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: getMetricForFingerprint, result: success}, map[string]string{operation: getMetricForFingerprint, result: failure})
 	}()
 
 	raw, err := l.fingerprintToMetrics.Get(coding.NewProtocolBufferEncoder(model.FingerprintToDTO(f)))
@@ -275,13 +290,12 @@ func (l *LevelDBMetricPersistence) GetMetricForFingerprint(f *model.Fingerprint)
 }
 
 func (l *LevelDBMetricPersistence) GetBoundaryValues(m *model.Metric, i *model.Interval, s *metric.StalenessPolicy) (open *model.Sample, end *model.Sample, err error) {
-	defer func() {
+	begin := time.Now()
-		m := getBoundaryValuesSuccessCount
-		if err != nil {
-			m = getBoundaryValuesFailureCount
-		}
 
-		m.Increment()
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: getBoundaryValues, result: success}, map[string]string{operation: getBoundaryValues, result: failure})
 	}()
 
 	// XXX: Maybe we will want to emit incomplete sets?
@@ -325,6 +339,14 @@ type iterator interface {
 }
 
 func (l *LevelDBMetricPersistence) GetValueAtTime(m *model.Metric, t *time.Time, s *metric.StalenessPolicy) (sample *model.Sample, err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: getValueAtTime, result: success}, map[string]string{operation: getValueAtTime, result: failure})
+	}()
+
 	d := model.MetricToDTO(m)
 
 	f, err := model.MessageToFingerprintDTO(d)
@@ -536,6 +558,14 @@ func (l *LevelDBMetricPersistence) GetValueAtTime(m *model.Metric, t *time.Time,
 }
 
 func (l *LevelDBMetricPersistence) GetRangeValues(m *model.Metric, i *model.Interval, s *metric.StalenessPolicy) (v *model.SampleSet, err error) {
+	begin := time.Now()
+
+	defer func() {
+		duration := time.Now().Sub(begin)
+
+		recordOutcome(storageOperations, storageLatency, duration, err, map[string]string{operation: getRangeValues, result: success}, map[string]string{operation: getRangeValues, result: failure})
+	}()
+
 	d := model.MetricToDTO(m)
 
 	f, err := model.MessageToFingerprintDTO(d)