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Introduce copy-on-write for metrics in AST.

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This depends on changes in:

https://github.com/prometheus/client_golang/tree/cow-metrics.

Change-Id: I80b94833a60ddf954c7cd92fd2cfbebd8dd46142
This commit is contained in:
Julius Volz 2014-12-08 16:55:49 +01:00
parent f2052c9c0d
commit c9618d11e8
12 changed files with 206 additions and 231 deletions
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20
rules/alerting.go
View file

@ -80,7 +80,7 @@ type Alert struct {
}
// sample returns a Sample suitable for recording the alert.
func (a Alert) sample(timestamp clientmodel.Timestamp, value clientmodel.SampleValue) *clientmodel.Sample {
func (a Alert) sample(timestamp clientmodel.Timestamp, value clientmodel.SampleValue) *ast.Sample {
recordedMetric := clientmodel.Metric{}
for label, value := range a.Labels {
recordedMetric[label] = value
@ -90,8 +90,11 @@ func (a Alert) sample(timestamp clientmodel.Timestamp, value clientmodel.SampleV
recordedMetric[AlertNameLabel] = clientmodel.LabelValue(a.Name)
recordedMetric[AlertStateLabel] = clientmodel.LabelValue(a.State.String())
return &clientmodel.Sample{
Metric: recordedMetric,
return &ast.Sample{
Metric: clientmodel.COWMetric{
Metric: recordedMetric,
Copied: true,
},
Value: value,
Timestamp: timestamp,
}
@ -145,18 +148,17 @@ func (rule *AlertingRule) Eval(timestamp clientmodel.Timestamp, storage local.St
// or update the expression value for existing elements.
resultFingerprints := utility.Set{}
for _, sample := range exprResult {
fp := new(clientmodel.Fingerprint)
fp.LoadFromMetric(sample.Metric)
resultFingerprints.Add(*fp)
fp := sample.Metric.Metric.Fingerprint()
resultFingerprints.Add(fp)
if alert, ok := rule.activeAlerts[*fp]; !ok {
if alert, ok := rule.activeAlerts[fp]; !ok {
labels := clientmodel.LabelSet{}
labels.MergeFromMetric(sample.Metric)
labels.MergeFromMetric(sample.Metric.Metric)
labels = labels.Merge(rule.Labels)
if _, ok := labels[clientmodel.MetricNameLabel]; ok {
delete(labels, clientmodel.MetricNameLabel)
}
rule.activeAlerts[*fp] = &Alert{
rule.activeAlerts[fp] = &Alert{
Name: rule.name,
Labels: labels,
State: Pending,