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Expressions: Measure total transformation requests and elapsed time (#30514)

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* Measure transformation number and elapsed time

* Change histogram to summary

* Apply suggestions from code review

Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>
This commit is contained in:
Sofia Papagiannaki 2021-02-01 15:48:02 +02:00 committed by GitHub
parent a3d765830e
commit 2f394a219b
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1 changed files with 33 additions and 1 deletions
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34
pkg/expr/transform.go
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@ -11,11 +11,30 @@ import (
"github.com/grafana/grafana/pkg/components/simplejson"
"github.com/grafana/grafana/pkg/models"
"github.com/grafana/grafana/pkg/tsdb"
"github.com/prometheus/client_golang/prometheus"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
var (
expressionsQuerySummary *prometheus.SummaryVec
)
func init() {
expressionsQuerySummary = prometheus.NewSummaryVec(
prometheus.SummaryOpts{
Name: "expressions_queries_duration_milliseconds",
Help: "Expressions query summary",
Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
},
[]string{"status"},
)
prometheus.MustRegister(expressionsQuerySummary)
}
// WrapTransformData creates and executes transform requests
func (s *Service) WrapTransformData(ctx context.Context, query *tsdb.TsdbQuery) (*tsdb.Response, error) {
sdkReq := &backend.QueryDataRequest{
PluginContext: backend.PluginContext{
@ -69,11 +88,24 @@ func (s *Service) WrapTransformData(ctx context.Context, query *tsdb.TsdbQuery)
// TransformData takes Queries which are either expressions nodes
// or are datasource requests.
func (s *Service) TransformData(ctx context.Context, req *backend.QueryDataRequest) (*backend.QueryDataResponse, error) {
func (s *Service) TransformData(ctx context.Context, req *backend.QueryDataRequest) (r *backend.QueryDataResponse, err error) {
if s.isDisabled() {
return nil, status.Error(codes.PermissionDenied, "Expressions are disabled")
}
start := time.Now()
defer func() {
var respStatus string
switch {
case err == nil:
respStatus = "success"
default:
respStatus = "failure"
}
duration := float64(time.Since(start).Nanoseconds()) / float64(time.Millisecond)
expressionsQuerySummary.WithLabelValues(respStatus).Observe(duration)
}()
// Build the pipeline from the request, checking for ordering issues (e.g. loops)
// and parsing graph nodes from the queries.
pipeline, err := s.BuildPipeline(req)