Official Go implementation of the Ethereum protocol
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go-ethereum/rpc/metrics.go

50 lines
1.7 KiB

// Copyright 2020 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package rpc
import (
"fmt"
"time"
"github.com/ethereum/go-ethereum/metrics"
)
var (
rpcRequestGauge = metrics.NewRegisteredGauge("rpc/requests", nil)
successfulRequestGauge = metrics.NewRegisteredGauge("rpc/success", nil)
failedRequestGauge = metrics.NewRegisteredGauge("rpc/failure", nil)
// serveTimeHistName is the prefix of the per-request serving time histograms.
serveTimeHistName = "rpc/duration"
rpcServingTimer = metrics.NewRegisteredTimer("rpc/duration/all", nil)
)
// updateServeTimeHistogram tracks the serving time of a remote RPC call.
func updateServeTimeHistogram(method string, success bool, elapsed time.Duration) {
note := "success"
if !success {
note = "failure"
}
h := fmt.Sprintf("%s/%s/%s", serveTimeHistName, method, note)
sampler := func() metrics.Sample {
return metrics.ResettingSample(
metrics.NewExpDecaySample(1028, 0.015),
)
}
metrics.GetOrRegisterHistogramLazy(h, nil, sampler).Update(elapsed.Nanoseconds())
}