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

     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 snap
    16  
    17  import "github.com/prometheus/client_golang/prometheus"
    18  
    19  var (
    20  	// TODO: save_fsync latency?
    21  	saveDurations = prometheus.NewHistogram(prometheus.HistogramOpts{
    22  		Namespace: "etcd_debugging",
    23  		Subsystem: "snap",
    24  		Name:      "save_total_duration_seconds",
    25  		Help:      "The total latency distributions of save called by snapshot.",
    26  		Buckets:   prometheus.ExponentialBuckets(0.001, 2, 14),
    27  	})
    28  
    29  	marshallingDurations = prometheus.NewHistogram(prometheus.HistogramOpts{
    30  		Namespace: "etcd_debugging",
    31  		Subsystem: "snap",
    32  		Name:      "save_marshalling_duration_seconds",
    33  		Help:      "The marshalling cost distributions of save called by snapshot.",
    34  		Buckets:   prometheus.ExponentialBuckets(0.001, 2, 14),
    35  	})
    36  
    37  	snapDBSaveSec = prometheus.NewHistogram(prometheus.HistogramOpts{
    38  		Namespace: "etcd",
    39  		Subsystem: "snap_db",
    40  		Name:      "save_total_duration_seconds",
    41  		Help:      "The total latency distributions of v3 snapshot save",
    42  
    43  		// lowest bucket start of upper bound 0.1 sec (100 ms) with factor 2
    44  		// highest bucket start of 0.1 sec * 2^9 == 51.2 sec
    45  		Buckets: prometheus.ExponentialBuckets(0.1, 2, 10),
    46  	})
    47  
    48  	snapDBFsyncSec = prometheus.NewHistogram(prometheus.HistogramOpts{
    49  		Namespace: "etcd",
    50  		Subsystem: "snap_db",
    51  		Name:      "fsync_duration_seconds",
    52  		Help:      "The latency distributions of fsyncing .snap.db file",
    53  
    54  		// lowest bucket start of upper bound 0.001 sec (1 ms) with factor 2
    55  		// highest bucket start of 0.001 sec * 2^13 == 8.192 sec
    56  		Buckets: prometheus.ExponentialBuckets(0.001, 2, 14),
    57  	})
    58  )
    59  
    60  func init() {
    61  	prometheus.MustRegister(saveDurations)
    62  	prometheus.MustRegister(marshallingDurations)
    63  	prometheus.MustRegister(snapDBSaveSec)
    64  	prometheus.MustRegister(snapDBFsyncSec)
    65  }