metrics.go

Documentation: go.etcd.io/etcd/server/v3/wal

     1  // Copyright 2015 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package wal
    16  
    17  import "github.com/prometheus/client_golang/prometheus"
    18  
    19  var (
    20  	walFsyncSec = prometheus.NewHistogram(prometheus.HistogramOpts{
    21  		Namespace: "etcd",
    22  		Subsystem: "disk",
    23  		Name:      "wal_fsync_duration_seconds",
    24  		Help:      "The latency distributions of fsync called by WAL.",
    25  
    26  		// lowest bucket start of upper bound 0.001 sec (1 ms) with factor 2
    27  		// highest bucket start of 0.001 sec * 2^13 == 8.192 sec
    28  		Buckets: prometheus.ExponentialBuckets(0.001, 2, 14),
    29  	})
    30  
    31  	walWriteBytes = prometheus.NewGauge(prometheus.GaugeOpts{
    32  		Namespace: "etcd",
    33  		Subsystem: "disk",
    34  		Name:      "wal_write_bytes_total",
    35  		Help:      "Total number of bytes written in WAL.",
    36  	})
    37  )
    38  
    39  func init() {
    40  	prometheus.MustRegister(walFsyncSec)
    41  	prometheus.MustRegister(walWriteBytes)
    42  }
    43
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