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query_metrics.go
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/
query_metrics.go
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// SPDX-License-Identifier: AGPL-3.0-only
// Provenance-includes-location: https://github.com/cortexproject/cortex/blob/master/pkg/distributor/distributor.go
// Provenance-includes-license: Apache-2.0
// Provenance-includes-copyright: The Cortex Authors.
package stats
import (
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
)
const (
RejectReasonMaxSeries = "max-fetched-series-per-query"
RejectReasonMaxChunkBytes = "max-fetched-chunk-bytes-per-query"
RejectReasonMaxChunks = "max-fetched-chunks-per-query"
RejectReasonMaxEstimatedChunks = "max-estimated-fetched-chunks-per-query"
)
var (
rejectReasons = []string{RejectReasonMaxSeries, RejectReasonMaxChunkBytes, RejectReasonMaxChunks, RejectReasonMaxEstimatedChunks}
)
// QueryMetrics collects metrics on the number of chunks used while serving queries.
type QueryMetrics struct {
// The number of chunks received from ingesters that were exact duplicates of chunks received from other ingesters
// responding to the same query.
IngesterChunksDeduplicated prometheus.Counter
// The total number of chunks received from ingesters that were used to evaluate queries, including any chunks
// discarded due to deduplication.
IngesterChunksTotal prometheus.Counter
// The total number of queries that were rejected for some reason.
QueriesRejectedTotal *prometheus.CounterVec
}
func NewQueryMetrics(reg prometheus.Registerer) *QueryMetrics {
m := &QueryMetrics{
IngesterChunksDeduplicated: promauto.With(reg).NewCounter(prometheus.CounterOpts{
Namespace: "cortex",
Name: "distributor_query_ingester_chunks_deduped_total",
Help: "Number of chunks received from ingesters at query time but discarded as duplicates.",
}),
IngesterChunksTotal: promauto.With(reg).NewCounter(prometheus.CounterOpts{
Namespace: "cortex",
Name: "distributor_query_ingester_chunks_total",
Help: "Number of chunks received from ingesters at query time, including any chunks discarded as duplicates.",
}),
QueriesRejectedTotal: promauto.With(reg).NewCounterVec(prometheus.CounterOpts{
Namespace: "cortex",
Name: "querier_queries_rejected_total",
Help: "Number of queries that were rejected, for example because they exceeded a limit.",
}, []string{"reason"}),
}
// Ensure the reject metric is initialised (so that we export the value "0" before a limit is reached for the first time).
for _, reason := range rejectReasons {
m.QueriesRejectedTotal.WithLabelValues(reason)
}
return m
}