VictoriaMetrics/app/vmselect/querystats/querystats.go

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package querystats
import (
"flag"
"fmt"
"io"
"sort"
"sync"
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/stringsutil"
)
var (
lastQueriesCount = flag.Int("search.queryStats.lastQueriesCount", 20000, "Query stats for /api/v1/status/top_queries is tracked on this number of last queries. "+
"Zero value disables query stats tracking")
minQueryDuration = flag.Duration("search.queryStats.minQueryDuration", time.Millisecond, "The minimum duration for queries to track in query stats at /api/v1/status/top_queries. Queries with lower duration are ignored in query stats")
)
var (
qsTracker *queryStatsTracker
initOnce sync.Once
)
// Enabled returns true of query stats tracking is enabled.
func Enabled() bool {
return *lastQueriesCount > 0
}
// RegisterQuery registers the query on the given timeRangeMsecs, which has been started at startTime.
//
// RegisterQuery must be called when the query is finished.
func RegisterQuery(accountID, projectID uint32, query string, timeRangeMsecs int64, startTime time.Time) {
initOnce.Do(initQueryStats)
qsTracker.registerQuery(accountID, projectID, query, timeRangeMsecs, startTime)
}
// RegisterQueryMultiTenant registers the query on the given timeRangeMsecs, which has been started at startTime.
//
// RegisterQueryMultiTenant must be called when the query is finished.
func RegisterQueryMultiTenant(query string, timeRangeMsecs int64, startTime time.Time) {
initOnce.Do(initQueryStats)
qsTracker.registerQueryMultiTenant(query, timeRangeMsecs, startTime)
}
// WriteJSONQueryStats writes query stats to given writer in json format.
func WriteJSONQueryStats(w io.Writer, topN int, maxLifetime time.Duration) {
initOnce.Do(initQueryStats)
qsTracker.writeJSONQueryStats(w, topN, nil, maxLifetime)
}
// WriteJSONQueryStatsForAccountProject writes query stats for the given (accountID, projectID) to given writer in json format.
func WriteJSONQueryStatsForAccountProject(w io.Writer, topN int, accountID, projectID uint32, maxLifetime time.Duration) {
initOnce.Do(initQueryStats)
apFilter := &accountProjectFilter{
accountID: accountID,
projectID: projectID,
}
qsTracker.writeJSONQueryStats(w, topN, apFilter, maxLifetime)
}
// queryStatsTracker holds statistics for queries
type queryStatsTracker struct {
mu sync.Mutex
a []queryStatRecord
nextIdx uint
}
type queryStatRecord struct {
accountID uint32
projectID uint32
query string
timeRangeSecs int64
registerTime time.Time
duration time.Duration
multiTenant bool
}
type queryStatKey struct {
accountID uint32
projectID uint32
query string
timeRangeSecs int64
multiTenant bool
}
type accountProjectFilter struct {
accountID uint32
projectID uint32
}
func initQueryStats() {
recordsCount := *lastQueriesCount
if recordsCount <= 0 {
recordsCount = 1
} else {
logger.Infof("enabled query stats tracking at `/api/v1/status/top_queries` with -search.queryStats.lastQueriesCount=%d, -search.queryStats.minQueryDuration=%s",
*lastQueriesCount, *minQueryDuration)
}
qsTracker = &queryStatsTracker{
a: make([]queryStatRecord, recordsCount),
}
}
func (qst *queryStatsTracker) writeJSONQueryStats(w io.Writer, topN int, apFilter *accountProjectFilter, maxLifetime time.Duration) {
fmt.Fprintf(w, `{"topN":"%d","maxLifetime":"%s",`, topN, maxLifetime)
fmt.Fprintf(w, `"search.queryStats.lastQueriesCount":%d,`, *lastQueriesCount)
fmt.Fprintf(w, `"search.queryStats.minQueryDuration":"%s",`, *minQueryDuration)
fmt.Fprintf(w, `"topByCount":[`)
topByCount := qst.getTopByCount(topN, apFilter, maxLifetime)
for i, r := range topByCount {
fmt.Fprintf(w, `{"accountID":%d,"projectID":%d,"query":%s,"timeRangeSeconds":%d,"count":%d,"multiTenant":%v}`, r.accountID, r.projectID, stringsutil.JSONString(r.query), r.timeRangeSecs, r.count, r.multiTenant)
if i+1 < len(topByCount) {
fmt.Fprintf(w, `,`)
}
}
fmt.Fprintf(w, `],"topByAvgDuration":[`)
topByAvgDuration := qst.getTopByAvgDuration(topN, apFilter, maxLifetime)
for i, r := range topByAvgDuration {
fmt.Fprintf(w, `{"accountID":%d,"projectID":%d,"query":%s,"timeRangeSeconds":%d,"avgDurationSeconds":%.3f,"count":%d,"multiTenant": %v}`,
r.accountID, r.projectID, stringsutil.JSONString(r.query), r.timeRangeSecs, r.duration.Seconds(), r.count, r.multiTenant)
if i+1 < len(topByAvgDuration) {
fmt.Fprintf(w, `,`)
}
}
fmt.Fprintf(w, `],"topBySumDuration":[`)
topBySumDuration := qst.getTopBySumDuration(topN, apFilter, maxLifetime)
for i, r := range topBySumDuration {
fmt.Fprintf(w, `{"accountID":%d,"projectID":%d,"query":%s,"timeRangeSeconds":%d,"sumDurationSeconds":%.3f,"count":%d,"multiTenant":%v}`,
r.accountID, r.projectID, stringsutil.JSONString(r.query), r.timeRangeSecs, r.duration.Seconds(), r.count, r.multiTenant)
if i+1 < len(topBySumDuration) {
fmt.Fprintf(w, `,`)
}
}
fmt.Fprintf(w, `]}`)
}
func (qst *queryStatsTracker) registerQuery(accountID, projectID uint32, query string, timeRangeMsecs int64, startTime time.Time) {
registerTime := time.Now()
duration := registerTime.Sub(startTime)
if duration < *minQueryDuration {
return
}
qst.mu.Lock()
defer qst.mu.Unlock()
a := qst.a
idx := qst.nextIdx
if idx >= uint(len(a)) {
idx = 0
}
qst.nextIdx = idx + 1
r := &a[idx]
r.accountID = accountID
r.projectID = projectID
r.query = query
r.timeRangeSecs = timeRangeMsecs / 1000
r.registerTime = registerTime
r.duration = duration
}
func (qst *queryStatsTracker) registerQueryMultiTenant(query string, timeRangeMsecs int64, startTime time.Time) {
registerTime := time.Now()
duration := registerTime.Sub(startTime)
if duration < *minQueryDuration {
return
}
qst.mu.Lock()
defer qst.mu.Unlock()
a := qst.a
idx := qst.nextIdx
if idx >= uint(len(a)) {
idx = 0
}
qst.nextIdx = idx + 1
r := &a[idx]
r.multiTenant = true
r.query = query
r.timeRangeSecs = timeRangeMsecs / 1000
r.registerTime = registerTime
r.duration = duration
}
func (r *queryStatRecord) matches(apFilter *accountProjectFilter, currentTime time.Time, maxLifetime time.Duration) bool {
if r.query == "" || currentTime.Sub(r.registerTime) > maxLifetime {
return false
}
if apFilter != nil && (apFilter.accountID != r.accountID || apFilter.projectID != r.projectID) {
return false
}
return true
}
func (r *queryStatRecord) key() queryStatKey {
return queryStatKey{
accountID: r.accountID,
projectID: r.projectID,
query: r.query,
timeRangeSecs: r.timeRangeSecs,
multiTenant: r.multiTenant,
}
}
func (qst *queryStatsTracker) getTopByCount(topN int, apFilter *accountProjectFilter, maxLifetime time.Duration) []queryStatByCount {
currentTime := time.Now()
qst.mu.Lock()
m := make(map[queryStatKey]int)
for _, r := range qst.a {
if r.matches(apFilter, currentTime, maxLifetime) {
k := r.key()
m[k] = m[k] + 1
}
}
qst.mu.Unlock()
var a []queryStatByCount
for k, count := range m {
a = append(a, queryStatByCount{
accountID: k.accountID,
projectID: k.projectID,
query: k.query,
timeRangeSecs: k.timeRangeSecs,
count: count,
multiTenant: k.multiTenant,
})
}
sort.Slice(a, func(i, j int) bool {
return a[i].count > a[j].count
})
if len(a) > topN {
a = a[:topN]
}
return a
}
type queryStatByCount struct {
accountID uint32
projectID uint32
query string
timeRangeSecs int64
count int
multiTenant bool
}
func (qst *queryStatsTracker) getTopByAvgDuration(topN int, apFilter *accountProjectFilter, maxLifetime time.Duration) []queryStatByDuration {
currentTime := time.Now()
qst.mu.Lock()
type countSum struct {
count int
sum time.Duration
}
m := make(map[queryStatKey]countSum)
for _, r := range qst.a {
if r.matches(apFilter, currentTime, maxLifetime) {
k := r.key()
ks := m[k]
ks.count++
ks.sum += r.duration
m[k] = ks
}
}
qst.mu.Unlock()
var a []queryStatByDuration
for k, ks := range m {
a = append(a, queryStatByDuration{
accountID: k.accountID,
projectID: k.projectID,
query: k.query,
timeRangeSecs: k.timeRangeSecs,
duration: ks.sum / time.Duration(ks.count),
count: ks.count,
multiTenant: k.multiTenant,
})
}
sort.Slice(a, func(i, j int) bool {
return a[i].duration > a[j].duration
})
if len(a) > topN {
a = a[:topN]
}
return a
}
type queryStatByDuration struct {
accountID uint32
projectID uint32
query string
timeRangeSecs int64
duration time.Duration
count int
multiTenant bool
}
func (qst *queryStatsTracker) getTopBySumDuration(topN int, apFilter *accountProjectFilter, maxLifetime time.Duration) []queryStatByDuration {
currentTime := time.Now()
qst.mu.Lock()
type countDuration struct {
count int
sum time.Duration
}
m := make(map[queryStatKey]countDuration)
for _, r := range qst.a {
if r.matches(apFilter, currentTime, maxLifetime) {
k := r.key()
kd := m[k]
kd.count++
kd.sum += r.duration
m[k] = kd
}
}
qst.mu.Unlock()
var a []queryStatByDuration
for k, kd := range m {
a = append(a, queryStatByDuration{
accountID: k.accountID,
projectID: k.projectID,
query: k.query,
timeRangeSecs: k.timeRangeSecs,
duration: kd.sum,
count: kd.count,
multiTenant: k.multiTenant,
})
}
sort.Slice(a, func(i, j int) bool {
return a[i].duration > a[j].duration
})
if len(a) > topN {
a = a[:topN]
}
return a
}