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Remove MaxConcurrent from the PromQL engine opts (#6712)

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Since we use ActiveQueryTracker to check for concurrency in
d992c36b3a it does not make sense to keep
the MaxConcurrent value as an option of the PromQL engine.

This pull request removes it from the PromQL engine options, sets the
max concurrent metric to -1 if there is no active query tracker, and use
the value of the active query tracker otherwise.

It removes dead code and also will inform people who import the promql
package that we made that change, as it breaks the EngineOpts struct.

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
This commit is contained in:
Julien Pivotto 2020-01-28 21:38:49 +01:00 committed by Brian Brazil
parent 540dc7dfb0
commit 9adad8ad30
11 changed files with 105 additions and 117 deletions
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1
cmd/prometheus/main.go
View file

@ -357,7 +357,6 @@ func main() {
opts = promql.EngineOpts{
Logger: log.With(logger, "component", "query engine"),
Reg: prometheus.DefaultRegisterer,
MaxConcurrent: cfg.queryConcurrency,
MaxSamples: cfg.queryMaxSamples,
Timeout: time.Duration(cfg.queryTimeout),
ActiveQueryTracker: promql.NewActiveQueryTracker(cfg.localStoragePath, cfg.queryConcurrency, log.With(logger, "component", "activeQueryTracker")),

1
promql/bench_test.go
View file

@ -31,7 +31,6 @@ func BenchmarkRangeQuery(b *testing.B) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 50000000,
Timeout: 100 * time.Second,
}

8
promql/engine.go
View file

@ -217,7 +217,6 @@ func contextErr(err error, env string) error {
type EngineOpts struct {
Logger log.Logger
Reg prometheus.Registerer
MaxConcurrent int
MaxSamples int
Timeout time.Duration
ActiveQueryTracker *ActiveQueryTracker
@ -299,7 +298,12 @@ func NewEngine(opts EngineOpts) *Engine {
Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
}),
}
metrics.maxConcurrentQueries.Set(float64(opts.MaxConcurrent))
if t := opts.ActiveQueryTracker; t != nil {
metrics.maxConcurrentQueries.Set(float64(t.GetMaxConcurrent()))
} else {
metrics.maxConcurrentQueries.Set(-1)
}
if opts.Reg != nil {
opts.Reg.MustRegister(

13
promql/engine_test.go
View file

@ -41,7 +41,6 @@ func TestQueryConcurrency(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: maxConcurrency,
MaxSamples: 10,
Timeout: 100 * time.Second,
ActiveQueryTracker: queryTracker,
@ -60,7 +59,7 @@ func TestQueryConcurrency(t *testing.T) {
return nil
}
for i := 0; i < opts.MaxConcurrent; i++ {
for i := 0; i < maxConcurrency; i++ {
q := engine.newTestQuery(f)
go q.Exec(ctx)
select {
@ -92,7 +91,7 @@ func TestQueryConcurrency(t *testing.T) {
}
// Terminate remaining queries.
for i := 0; i < opts.MaxConcurrent; i++ {
for i := 0; i < maxConcurrency; i++ {
block <- struct{}{}
}
}
@ -101,7 +100,6 @@ func TestQueryTimeout(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 20,
MaxSamples: 10,
Timeout: 5 * time.Millisecond,
}
@ -129,7 +127,6 @@ func TestQueryCancel(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -200,7 +197,6 @@ func TestQueryError(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -263,7 +259,6 @@ func TestParamsSetCorrectly(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -468,7 +463,6 @@ func TestEngineShutdown(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -1151,7 +1145,6 @@ func TestQueryLogger_basic(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -1203,7 +1196,6 @@ func TestQueryLogger_fields(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -1233,7 +1225,6 @@ func TestQueryLogger_error(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}

1
promql/functions_test.go
View file

@ -33,7 +33,6 @@ func TestDeriv(t *testing.T) {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10000,
Timeout: 10 * time.Second,
}

18
promql/query_logger.go
View file

@ -31,6 +31,7 @@ type ActiveQueryTracker struct {
mmapedFile []byte
getNextIndex chan int
logger log.Logger
maxConcurrent int
}
type Entry struct {
@ -102,13 +103,13 @@ func getMMapedFile(filename string, filesize int, logger log.Logger) ([]byte, er
return fileAsBytes, err
}
func NewActiveQueryTracker(localStoragePath string, maxQueries int, logger log.Logger) *ActiveQueryTracker {
func NewActiveQueryTracker(localStoragePath string, maxConcurrent int, logger log.Logger) *ActiveQueryTracker {
err := os.MkdirAll(localStoragePath, 0777)
if err != nil {
level.Error(logger).Log("msg", "Failed to create directory for logging active queries")
}
filename, filesize := filepath.Join(localStoragePath, "queries.active"), 1+maxQueries*entrySize
filename, filesize := filepath.Join(localStoragePath, "queries.active"), 1+maxConcurrent*entrySize
logUnfinishedQueries(filename, filesize, logger)
fileAsBytes, err := getMMapedFile(filename, filesize, logger)
@ -119,11 +120,12 @@ func NewActiveQueryTracker(localStoragePath string, maxQueries int, logger log.L
copy(fileAsBytes, "[")
activeQueryTracker := ActiveQueryTracker{
mmapedFile: fileAsBytes,
getNextIndex: make(chan int, maxQueries),
getNextIndex: make(chan int, maxConcurrent),
logger: logger,
maxConcurrent: maxConcurrent,
}
activeQueryTracker.generateIndices(maxQueries)
activeQueryTracker.generateIndices(maxConcurrent)
return &activeQueryTracker
}
@ -164,12 +166,16 @@ func newJSONEntry(query string, logger log.Logger) []byte {
return jsonEntry
}
func (tracker ActiveQueryTracker) generateIndices(maxQueries int) {
for i := 0; i < maxQueries; i++ {
func (tracker ActiveQueryTracker) generateIndices(maxConcurrent int) {
for i := 0; i < maxConcurrent; i++ {
tracker.getNextIndex <- 1 + (i * entrySize)
}
}
func (tracker ActiveQueryTracker) GetMaxConcurrent() int {
return tracker.maxConcurrent
}
func (tracker ActiveQueryTracker) Delete(insertIndex int) {
copy(tracker.mmapedFile[insertIndex:], strings.Repeat("\x00", entrySize))
tracker.getNextIndex <- insertIndex

2
promql/test.go
View file

@ -518,7 +518,6 @@ func (t *Test) clear() {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 20,
MaxSamples: 10000,
Timeout: 100 * time.Second,
}
@ -632,7 +631,6 @@ func (ll *LazyLoader) clear() {
opts := EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 20,
MaxSamples: 10000,
Timeout: 100 * time.Second,
}

1
rules/alerting_test.go
View file

@ -300,7 +300,6 @@ func TestAlertingRuleDuplicate(t *testing.T) {
opts := promql.EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}

4
rules/manager_test.go
View file

@ -504,7 +504,6 @@ func TestStaleness(t *testing.T) {
engineOpts := promql.EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -691,7 +690,6 @@ func TestUpdate(t *testing.T) {
opts := promql.EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -823,7 +821,6 @@ func TestNotify(t *testing.T) {
engineOpts := promql.EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -891,7 +888,6 @@ func TestMetricsUpdate(t *testing.T) {
opts := promql.EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}

2
rules/recording_test.go
View file

@ -33,7 +33,6 @@ func TestRuleEval(t *testing.T) {
opts := promql.EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}
@ -101,7 +100,6 @@ func TestRuleEvalDuplicate(t *testing.T) {
opts := promql.EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 10 * time.Second,
}

1
web/api/v1/api_test.go
View file

@ -230,7 +230,6 @@ func (m rulesRetrieverMock) RuleGroups() []*rules.Group {
engineOpts := promql.EngineOpts{
Logger: nil,
Reg: nil,
MaxConcurrent: 10,
MaxSamples: 10,
Timeout: 100 * time.Second,
}