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Merge pull request #12418 from bboreham/parsing-concurrency

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promql: include parsing in active-query tracking
This commit is contained in:
Bryan Boreham 2023-06-21 16:52:12 +01:00 committed by GitHub
parent 87d08abe11 67d2ef004d
commit 391ecaec9a
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 39 additions and 28 deletions
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67
promql/engine.go
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@ -408,44 +408,50 @@ func (ng *Engine) SetQueryLogger(l QueryLogger) {
}
// NewInstantQuery returns an evaluation query for the given expression at the given time.
func (ng *Engine) NewInstantQuery(_ context.Context, q storage.Queryable, opts *QueryOpts, qs string, ts time.Time) (Query, error) {
func (ng *Engine) NewInstantQuery(ctx context.Context, q storage.Queryable, opts *QueryOpts, qs string, ts time.Time) (Query, error) {
pExpr, qry := ng.newQuery(q, qs, opts, ts, ts, 0)
finishQueue, err := ng.queueActive(ctx, qry)
if err != nil {
return nil, err
}
defer finishQueue()
expr, err := parser.ParseExpr(qs)
if err != nil {
return nil, err
}
qry, err := ng.newQuery(q, opts, expr, ts, ts, 0)
if err != nil {
if err := ng.validateOpts(expr); err != nil {
return nil, err
}
qry.q = qs
*pExpr = PreprocessExpr(expr, ts, ts)
return qry, nil
}
// NewRangeQuery returns an evaluation query for the given time range and with
// the resolution set by the interval.
func (ng *Engine) NewRangeQuery(_ context.Context, q storage.Queryable, opts *QueryOpts, qs string, start, end time.Time, interval time.Duration) (Query, error) {
func (ng *Engine) NewRangeQuery(ctx context.Context, q storage.Queryable, opts *QueryOpts, qs string, start, end time.Time, interval time.Duration) (Query, error) {
pExpr, qry := ng.newQuery(q, qs, opts, start, end, interval)
finishQueue, err := ng.queueActive(ctx, qry)
if err != nil {
return nil, err
}
defer finishQueue()
expr, err := parser.ParseExpr(qs)
if err != nil {
return nil, err
}
if err := ng.validateOpts(expr); err != nil {
return nil, err
}
if expr.Type() != parser.ValueTypeVector && expr.Type() != parser.ValueTypeScalar {
return nil, fmt.Errorf("invalid expression type %q for range query, must be Scalar or instant Vector", parser.DocumentedType(expr.Type()))
}
qry, err := ng.newQuery(q, opts, expr, start, end, interval)
if err != nil {
return nil, err
}
qry.q = qs
*pExpr = PreprocessExpr(expr, start, end)
return qry, nil
}
func (ng *Engine) newQuery(q storage.Queryable, opts *QueryOpts, expr parser.Expr, start, end time.Time, interval time.Duration) (*query, error) {
if err := ng.validateOpts(expr); err != nil {
return nil, err
}
func (ng *Engine) newQuery(q storage.Queryable, qs string, opts *QueryOpts, start, end time.Time, interval time.Duration) (*parser.Expr, *query) {
// Default to empty QueryOpts if not provided.
if opts == nil {
opts = &QueryOpts{}
@ -457,20 +463,20 @@ func (ng *Engine) newQuery(q storage.Queryable, opts *QueryOpts, expr parser.Exp
}
es := &parser.EvalStmt{
Expr: PreprocessExpr(expr, start, end),
Start: start,
End: end,
Interval: interval,
LookbackDelta: lookbackDelta,
}
qry := &query{
q: qs,
stmt: es,
ng: ng,
stats: stats.NewQueryTimers(),
sampleStats: stats.NewQuerySamples(ng.enablePerStepStats && opts.EnablePerStepStats),
queryable: q,
}
return qry, nil
return &es.Expr, qry
}
var (
@ -589,18 +595,11 @@ func (ng *Engine) exec(ctx context.Context, q *query) (v parser.Value, ws storag
execSpanTimer, ctx := q.stats.GetSpanTimer(ctx, stats.ExecTotalTime)
defer execSpanTimer.Finish()
queueSpanTimer, _ := q.stats.GetSpanTimer(ctx, stats.ExecQueueTime, ng.metrics.queryQueueTime)
// Log query in active log. The active log guarantees that we don't run over
// MaxConcurrent queries.
if ng.activeQueryTracker != nil {
queryIndex, err := ng.activeQueryTracker.Insert(ctx, q.q)
if err != nil {
queueSpanTimer.Finish()
return nil, nil, contextErr(err, "query queue")
}
defer ng.activeQueryTracker.Delete(queryIndex)
finishQueue, err := ng.queueActive(ctx, q)
if err != nil {
return nil, nil, err
}
queueSpanTimer.Finish()
defer finishQueue()
// Cancel when execution is done or an error was raised.
defer q.cancel()
@ -623,6 +622,18 @@ func (ng *Engine) exec(ctx context.Context, q *query) (v parser.Value, ws storag
panic(fmt.Errorf("promql.Engine.exec: unhandled statement of type %T", q.Statement()))
}
// Log query in active log. The active log guarantees that we don't run over
// MaxConcurrent queries.
func (ng *Engine) queueActive(ctx context.Context, q *query) (func(), error) {
if ng.activeQueryTracker == nil {
return func() {}, nil
}
queueSpanTimer, _ := q.stats.GetSpanTimer(ctx, stats.ExecQueueTime, ng.metrics.queryQueueTime)
queryIndex, err := ng.activeQueryTracker.Insert(ctx, q.q)
queueSpanTimer.Finish()
return func() { ng.activeQueryTracker.Delete(queryIndex) }, err
}
func timeMilliseconds(t time.Time) int64 {
return t.UnixNano() / int64(time.Millisecond/time.Nanosecond)
}