go.etcd.io/etcd@v3.3.27+incompatible/mvcc/backend/metrics.go (about)

     1  // Copyright 2016 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 backend
    16  
    17  import "github.com/prometheus/client_golang/prometheus"
    18  
    19  var (
    20  	commitDurations = prometheus.NewHistogram(prometheus.HistogramOpts{
    21  		Namespace: "etcd",
    22  		Subsystem: "disk",
    23  		Name:      "backend_commit_duration_seconds",
    24  		Help:      "The latency distributions of commit called by backend.",
    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  	defragDurations = prometheus.NewHistogram(prometheus.HistogramOpts{
    32  		Namespace: "etcd",
    33  		Subsystem: "disk",
    34  		Name:      "backend_defrag_duration_seconds",
    35  		Help:      "The latency distribution of backend defragmentation.",
    36  
    37  		// 100 MB usually takes 1 sec, so start with 10 MB of 100 ms
    38  		// lowest bucket start of upper bound 0.1 sec (100 ms) with factor 2
    39  		// highest bucket start of 0.1 sec * 2^12 == 409.6 sec
    40  		Buckets: prometheus.ExponentialBuckets(.1, 2, 13),
    41  	})
    42  
    43  	snapshotDurations = prometheus.NewHistogram(prometheus.HistogramOpts{
    44  		Namespace: "etcd",
    45  		Subsystem: "disk",
    46  		Name:      "backend_snapshot_duration_seconds",
    47  		Help:      "The latency distribution of backend snapshots.",
    48  
    49  		// lowest bucket start of upper bound 0.01 sec (10 ms) with factor 2
    50  		// highest bucket start of 0.01 sec * 2^16 == 655.36 sec
    51  		Buckets: prometheus.ExponentialBuckets(.01, 2, 17),
    52  	})
    53  )
    54  
    55  func init() {
    56  	prometheus.MustRegister(commitDurations)
    57  	prometheus.MustRegister(defragDurations)
    58  	prometheus.MustRegister(snapshotDurations)
    59  }