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extra_info.go
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extra_info.go
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// Copyright 2017 Percona LLC
//
// 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 mongos
import (
"github.com/prometheus/client_golang/prometheus"
)
var (
extraInfopageFaultsTotal = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: "extra_info",
Name: "page_faults_total",
Help: "The page_faults Reports the total number of page faults that require disk operations. Page faults refer to operations that require the database server to access data which isn’t available in active memory. The page_faults counter may increase dramatically during moments of poor performance and may correlate with limited memory environments and larger data sets. Limited and sporadic page faults do not necessarily indicate an issue",
})
extraInfoheapUsageBytes = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: "extra_info",
Name: "heap_usage_bytes",
Help: "The heap_usage_bytes field is only available on Unix/Linux systems, and reports the total size in bytes of heap space used by the database process",
})
)
// ExtraInfo has extra info metrics
type ExtraInfo struct {
HeapUsageBytes float64 `bson:"heap_usage_bytes"`
PageFaults float64 `bson:"page_faults"`
}
// Export exports the metrics to prometheus.
func (extraInfo *ExtraInfo) Export(ch chan<- prometheus.Metric) {
extraInfoheapUsageBytes.Set(extraInfo.HeapUsageBytes)
extraInfopageFaultsTotal.Set(extraInfo.PageFaults)
extraInfoheapUsageBytes.Collect(ch)
extraInfopageFaultsTotal.Collect(ch)
}
// Describe describes the metrics for prometheus
func (extraInfo *ExtraInfo) Describe(ch chan<- *prometheus.Desc) {
extraInfoheapUsageBytes.Describe(ch)
extraInfopageFaultsTotal.Describe(ch)
}