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metrics.go
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metrics.go
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// Copyright 2016 TiKV Project Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pd
import (
"sync/atomic"
"github.com/prometheus/client_golang/prometheus"
)
// make sure register metrics only once
var initialized int32
func init() {
initMetrics(prometheus.Labels{})
initCmdDurations()
}
func initAndRegisterMetrics(constLabels prometheus.Labels) {
if atomic.CompareAndSwapInt32(&initialized, 0, 1) {
// init metrics with constLabels
initMetrics(constLabels)
initCmdDurations()
// register metrics
registerMetrics()
}
}
var (
cmdDuration *prometheus.HistogramVec
cmdFailedDuration *prometheus.HistogramVec
requestDuration *prometheus.HistogramVec
tsoBestBatchSize prometheus.Histogram
tsoBatchSize prometheus.Histogram
tsoBatchSendLatency prometheus.Histogram
requestForwarded *prometheus.GaugeVec
)
func initMetrics(constLabels prometheus.Labels) {
cmdDuration = prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Namespace: "pd_client",
Subsystem: "cmd",
Name: "handle_cmds_duration_seconds",
Help: "Bucketed histogram of processing time (s) of handled success cmds.",
ConstLabels: constLabels,
Buckets: prometheus.ExponentialBuckets(0.0005, 2, 13),
}, []string{"type"})
cmdFailedDuration = prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Namespace: "pd_client",
Subsystem: "cmd",
Name: "handle_failed_cmds_duration_seconds",
Help: "Bucketed histogram of processing time (s) of failed handled cmds.",
ConstLabels: constLabels,
Buckets: prometheus.ExponentialBuckets(0.0005, 2, 13),
}, []string{"type"})
requestDuration = prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Namespace: "pd_client",
Subsystem: "request",
Name: "handle_requests_duration_seconds",
Help: "Bucketed histogram of processing time (s) of handled requests.",
ConstLabels: constLabels,
Buckets: prometheus.ExponentialBuckets(0.0005, 2, 13),
}, []string{"type"})
tsoBestBatchSize = prometheus.NewHistogram(
prometheus.HistogramOpts{
Namespace: "pd_client",
Subsystem: "request",
Name: "handle_tso_best_batch_size",
Help: "Bucketed histogram of the best batch size of handled requests.",
ConstLabels: constLabels,
Buckets: prometheus.ExponentialBuckets(1, 2, 13),
})
tsoBatchSize = prometheus.NewHistogram(
prometheus.HistogramOpts{
Namespace: "pd_client",
Subsystem: "request",
Name: "handle_tso_batch_size",
Help: "Bucketed histogram of the batch size of handled requests.",
ConstLabels: constLabels,
Buckets: []float64{1, 2, 4, 8, 10, 14, 18, 22, 26, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 120, 140, 160, 180, 200, 500, 1000},
})
tsoBatchSendLatency = prometheus.NewHistogram(
prometheus.HistogramOpts{
Namespace: "pd_client",
Subsystem: "request",
Name: "tso_batch_send_latency",
ConstLabels: constLabels,
Buckets: prometheus.ExponentialBuckets(1, 2, 34), // 1ns ~ 8s
Help: "tso batch send latency",
})
requestForwarded = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: "pd_client",
Subsystem: "request",
Name: "forwarded_status",
Help: "The status to indicate if the request is forwarded",
ConstLabels: constLabels,
}, []string{"host", "delegate"})
}
var (
cmdDurationWait prometheus.Observer
cmdDurationTSO prometheus.Observer
cmdDurationTSOAsyncWait prometheus.Observer
cmdDurationGetRegion prometheus.Observer
cmdDurationGetAllMembers prometheus.Observer
cmdDurationGetPrevRegion prometheus.Observer
cmdDurationGetRegionByID prometheus.Observer
cmdDurationScanRegions prometheus.Observer
cmdDurationGetStore prometheus.Observer
cmdDurationGetAllStores prometheus.Observer
cmdDurationUpdateGCSafePoint prometheus.Observer
cmdDurationUpdateServiceGCSafePoint prometheus.Observer
cmdDurationScatterRegion prometheus.Observer
cmdDurationScatterRegions prometheus.Observer
cmdDurationGetOperator prometheus.Observer
cmdDurationSplitRegions prometheus.Observer
cmdDurationSplitAndScatterRegions prometheus.Observer
cmdDurationLoadKeyspace prometheus.Observer
cmdDurationUpdateKeyspaceState prometheus.Observer
cmdDurationGetAllKeyspaces prometheus.Observer
cmdDurationGet prometheus.Observer
cmdDurationPut prometheus.Observer
cmdDurationUpdateGCSafePointV2 prometheus.Observer
cmdDurationUpdateServiceSafePointV2 prometheus.Observer
cmdFailDurationGetRegion prometheus.Observer
cmdFailDurationTSO prometheus.Observer
cmdFailDurationGetAllMembers prometheus.Observer
cmdFailDurationGetPrevRegion prometheus.Observer
cmdFailedDurationGetRegionByID prometheus.Observer
cmdFailedDurationScanRegions prometheus.Observer
cmdFailedDurationGetStore prometheus.Observer
cmdFailedDurationGetAllStores prometheus.Observer
cmdFailedDurationUpdateGCSafePoint prometheus.Observer
cmdFailedDurationUpdateServiceGCSafePoint prometheus.Observer
cmdFailedDurationLoadKeyspace prometheus.Observer
cmdFailedDurationUpdateKeyspaceState prometheus.Observer
requestDurationTSO prometheus.Observer
cmdFailedDurationGet prometheus.Observer
cmdFailedDurationPut prometheus.Observer
cmdFailedDurationUpdateGCSafePointV2 prometheus.Observer
cmdFailedDurationUpdateServiceSafePointV2 prometheus.Observer
)
func initCmdDurations() {
// WithLabelValues is a heavy operation, define variable to avoid call it every time.
cmdDurationWait = cmdDuration.WithLabelValues("wait")
cmdDurationTSO = cmdDuration.WithLabelValues("tso")
cmdDurationTSOAsyncWait = cmdDuration.WithLabelValues("tso_async_wait")
cmdDurationGetRegion = cmdDuration.WithLabelValues("get_region")
cmdDurationGetAllMembers = cmdDuration.WithLabelValues("get_member_info")
cmdDurationGetPrevRegion = cmdDuration.WithLabelValues("get_prev_region")
cmdDurationGetRegionByID = cmdDuration.WithLabelValues("get_region_byid")
cmdDurationScanRegions = cmdDuration.WithLabelValues("scan_regions")
cmdDurationGetStore = cmdDuration.WithLabelValues("get_store")
cmdDurationGetAllStores = cmdDuration.WithLabelValues("get_all_stores")
cmdDurationUpdateGCSafePoint = cmdDuration.WithLabelValues("update_gc_safe_point")
cmdDurationUpdateServiceGCSafePoint = cmdDuration.WithLabelValues("update_service_gc_safe_point")
cmdDurationScatterRegion = cmdDuration.WithLabelValues("scatter_region")
cmdDurationScatterRegions = cmdDuration.WithLabelValues("scatter_regions")
cmdDurationGetOperator = cmdDuration.WithLabelValues("get_operator")
cmdDurationSplitRegions = cmdDuration.WithLabelValues("split_regions")
cmdDurationSplitAndScatterRegions = cmdDuration.WithLabelValues("split_and_scatter_regions")
cmdDurationLoadKeyspace = cmdDuration.WithLabelValues("load_keyspace")
cmdDurationUpdateKeyspaceState = cmdDuration.WithLabelValues("update_keyspace_state")
cmdDurationGetAllKeyspaces = cmdDuration.WithLabelValues("get_all_keyspaces")
cmdDurationGet = cmdDuration.WithLabelValues("get")
cmdDurationPut = cmdDuration.WithLabelValues("put")
cmdDurationUpdateGCSafePointV2 = cmdDuration.WithLabelValues("update_gc_safe_point_v2")
cmdDurationUpdateServiceSafePointV2 = cmdDuration.WithLabelValues("update_service_safe_point_v2")
cmdFailDurationGetRegion = cmdFailedDuration.WithLabelValues("get_region")
cmdFailDurationTSO = cmdFailedDuration.WithLabelValues("tso")
cmdFailDurationGetAllMembers = cmdFailedDuration.WithLabelValues("get_member_info")
cmdFailDurationGetPrevRegion = cmdFailedDuration.WithLabelValues("get_prev_region")
cmdFailedDurationGetRegionByID = cmdFailedDuration.WithLabelValues("get_region_byid")
cmdFailedDurationScanRegions = cmdFailedDuration.WithLabelValues("scan_regions")
cmdFailedDurationGetStore = cmdFailedDuration.WithLabelValues("get_store")
cmdFailedDurationGetAllStores = cmdFailedDuration.WithLabelValues("get_all_stores")
cmdFailedDurationUpdateGCSafePoint = cmdFailedDuration.WithLabelValues("update_gc_safe_point")
cmdFailedDurationUpdateServiceGCSafePoint = cmdFailedDuration.WithLabelValues("update_service_gc_safe_point")
cmdFailedDurationLoadKeyspace = cmdFailedDuration.WithLabelValues("load_keyspace")
cmdFailedDurationUpdateKeyspaceState = cmdFailedDuration.WithLabelValues("update_keyspace_state")
requestDurationTSO = requestDuration.WithLabelValues("tso")
cmdFailedDurationGet = cmdFailedDuration.WithLabelValues("get")
cmdFailedDurationPut = cmdFailedDuration.WithLabelValues("put")
cmdFailedDurationUpdateGCSafePointV2 = cmdFailedDuration.WithLabelValues("update_gc_safe_point_v2")
cmdFailedDurationUpdateServiceSafePointV2 = cmdFailedDuration.WithLabelValues("update_service_safe_point_v2")
}
func registerMetrics() {
prometheus.MustRegister(cmdDuration)
prometheus.MustRegister(cmdFailedDuration)
prometheus.MustRegister(requestDuration)
prometheus.MustRegister(tsoBestBatchSize)
prometheus.MustRegister(tsoBatchSize)
prometheus.MustRegister(tsoBatchSendLatency)
prometheus.MustRegister(requestForwarded)
}