github.com/MetalBlockchain/subnet-evm@v0.4.9/rpc/metrics.go (about)

     1  // (c) 2019-2020, Ava Labs, Inc.
     2  //
     3  // This file is a derived work, based on the go-ethereum library whose original
     4  // notices appear below.
     5  //
     6  // It is distributed under a license compatible with the licensing terms of the
     7  // original code from which it is derived.
     8  //
     9  // Much love to the original authors for their work.
    10  // **********
    11  // Copyright 2020 The go-ethereum Authors
    12  // This file is part of the go-ethereum library.
    13  //
    14  // The go-ethereum library is free software: you can redistribute it and/or modify
    15  // it under the terms of the GNU Lesser General Public License as published by
    16  // the Free Software Foundation, either version 3 of the License, or
    17  // (at your option) any later version.
    18  //
    19  // The go-ethereum library is distributed in the hope that it will be useful,
    20  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    21  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    22  // GNU Lesser General Public License for more details.
    23  //
    24  // You should have received a copy of the GNU Lesser General Public License
    25  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    26  
    27  package rpc
    28  
    29  import (
    30  	"fmt"
    31  	"time"
    32  
    33  	"github.com/MetalBlockchain/subnet-evm/metrics"
    34  )
    35  
    36  var (
    37  	rpcRequestGauge        = metrics.NewRegisteredGauge("rpc/requests", nil)
    38  	successfulRequestGauge = metrics.NewRegisteredGauge("rpc/success", nil)
    39  	failedRequestGauge     = metrics.NewRegisteredGauge("rpc/failure", nil)
    40  
    41  	// serveTimeHistName is the prefix of the per-request serving time histograms.
    42  	serveTimeHistName = "rpc/duration"
    43  
    44  	rpcServingTimer = metrics.NewRegisteredTimer("rpc/duration/all", nil)
    45  )
    46  
    47  // updateServeTimeHistogram tracks the serving time of a remote RPC call.
    48  func updateServeTimeHistogram(method string, success bool, elapsed time.Duration) {
    49  	note := "success"
    50  	if !success {
    51  		note = "failure"
    52  	}
    53  	h := fmt.Sprintf("%s/%s/%s", serveTimeHistName, method, note)
    54  	sampler := func() metrics.Sample {
    55  		return metrics.ResettingSample(
    56  			metrics.NewExpDecaySample(1028, 0.015),
    57  		)
    58  	}
    59  	metrics.GetOrRegisterHistogramLazy(h, nil, sampler).Update(elapsed.Microseconds())
    60  }