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metrics.go
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metrics.go
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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2023 Weaviate B.V. All rights reserved.
//
// CONTACT: hello@weaviate.io
//
package lsmkv
import (
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/weaviate/weaviate/usecases/monitoring"
)
type (
NsObserver func(ns int64)
Setter func(val uint64)
TimeObserver func(start time.Time)
)
type Metrics struct {
CompactionReplace *prometheus.GaugeVec
CompactionSet *prometheus.GaugeVec
CompactionMap *prometheus.GaugeVec
CompactionRoaringSet *prometheus.GaugeVec
ActiveSegments *prometheus.GaugeVec
bloomFilters prometheus.ObserverVec
SegmentObjects *prometheus.GaugeVec
SegmentSize *prometheus.GaugeVec
SegmentCount *prometheus.GaugeVec
startupDurations prometheus.ObserverVec
startupDiskIO prometheus.ObserverVec
objectCount prometheus.Gauge
memtableDurations prometheus.ObserverVec
memtableSize *prometheus.GaugeVec
DimensionSum *prometheus.GaugeVec
groupClasses bool
}
func NewMetrics(promMetrics *monitoring.PrometheusMetrics, className,
shardName string,
) *Metrics {
if promMetrics.Group {
className = "n/a"
shardName = "n/a"
}
replace := promMetrics.AsyncOperations.MustCurryWith(prometheus.Labels{
"operation": "compact_lsm_segments_stratreplace",
"class_name": className,
"shard_name": shardName,
})
set := promMetrics.AsyncOperations.MustCurryWith(prometheus.Labels{
"operation": "compact_lsm_segments_stratset",
"class_name": className,
"shard_name": shardName,
})
roaringSet := promMetrics.AsyncOperations.MustCurryWith(prometheus.Labels{
"operation": "compact_lsm_segments_stratroaringset",
"class_name": className,
"shard_name": shardName,
})
stratMap := promMetrics.AsyncOperations.MustCurryWith(prometheus.Labels{
"operation": "compact_lsm_segments_stratmap",
"class_name": className,
"shard_name": shardName,
})
return &Metrics{
groupClasses: promMetrics.Group,
CompactionReplace: replace,
CompactionSet: set,
CompactionMap: stratMap,
CompactionRoaringSet: roaringSet,
ActiveSegments: promMetrics.LSMSegmentCount.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
bloomFilters: promMetrics.LSMBloomFilters.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
SegmentObjects: promMetrics.LSMSegmentObjects.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
SegmentSize: promMetrics.LSMSegmentSize.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
SegmentCount: promMetrics.LSMSegmentCountByLevel.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
startupDiskIO: promMetrics.StartupDiskIO.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
startupDurations: promMetrics.StartupDurations.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
objectCount: promMetrics.ObjectCount.With(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
memtableDurations: promMetrics.LSMMemtableDurations.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
memtableSize: promMetrics.LSMMemtableSize.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
DimensionSum: promMetrics.VectorDimensionsSum.MustCurryWith(prometheus.Labels{
"class_name": className,
"shard_name": shardName,
}),
}
}
func noOpTimeObserver(start time.Time) {
// do nothing
}
func noOpNsObserver(startNs int64) {
// do nothing
}
func noOpSetter(val uint64) {
// do nothing
}
func (m *Metrics) MemtableOpObserver(path, strategy, op string) NsObserver {
if m == nil {
return noOpNsObserver
}
if m.groupClasses {
path = "n/a"
}
curried := m.memtableDurations.With(prometheus.Labels{
"operation": op,
"path": path,
"strategy": strategy,
})
return func(startNs int64) {
took := float64(time.Now().UnixNano()-startNs) / float64(time.Millisecond)
curried.Observe(took)
}
}
func (m *Metrics) MemtableSizeSetter(path, strategy string) Setter {
if m == nil || m.groupClasses {
// this metric would set absolute values, that's not possible in
// grouped mode, each call would essentially overwrite the last
return noOpSetter
}
curried := m.memtableSize.With(prometheus.Labels{
"path": path,
"strategy": strategy,
})
return func(size uint64) {
curried.Set(float64(size))
}
}
func (m *Metrics) BloomFilterObserver(strategy, operation string) TimeObserver {
if m == nil {
return noOpTimeObserver
}
curried := m.bloomFilters.With(prometheus.Labels{
"strategy": strategy,
"operation": operation,
})
return func(before time.Time) {
curried.Observe(float64(time.Since(before)) / float64(time.Millisecond))
}
}
func (m *Metrics) TrackStartupReadWALDiskIO(read int64, nanoseconds int64) {
if m == nil {
return
}
seconds := float64(nanoseconds) / float64(time.Second)
throughput := float64(read) / float64(seconds)
m.startupDiskIO.With(prometheus.Labels{"operation": "lsm_recover_wal"}).Observe(throughput)
}
func (m *Metrics) TrackStartupBucket(start time.Time) {
if m == nil {
return
}
took := float64(time.Since(start)) / float64(time.Millisecond)
m.startupDurations.With(prometheus.Labels{"operation": "lsm_startup_bucket"}).Observe(took)
}
func (m *Metrics) TrackStartupBucketRecovery(start time.Time) {
if m == nil {
return
}
took := float64(time.Since(start)) / float64(time.Millisecond)
m.startupDurations.With(prometheus.Labels{"operation": "lsm_startup_bucket_recovery"}).Observe(took)
}
func (m *Metrics) ObjectCount(count int) {
if m == nil {
return
}
m.objectCount.Set(float64(count))
}