72 lines
2.3 KiB
Go
72 lines
2.3 KiB
Go
// Copyright (C) 2022 The pages authors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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package metrics
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import (
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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)
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var (
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namespace = "pages"
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page = "page"
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// by default, summaries give us counts and sums which we can use to compute an average (not great, but it can work)
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// in addition to the default information, we report on the following quantiles:
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defaultObjectives = map[float64]float64{
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0.25: 0, // lower quartile
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0.5: 0, // median
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0.75: 0, // upper quartile
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0.90: 0, // One 9
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0.99: 0, // Two 9s
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}
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// PageViewCount tracks page views by how often they're loaded.
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PageViewCount = promauto.NewCounterVec(
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prometheus.CounterOpts{
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Namespace: namespace,
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Subsystem: page,
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Name: "view_count",
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Help: "the number of times a given page has been viewed and by what referrer",
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},
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[]string{"domain", "path", "referrer", "country"},
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)
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// PageSessionDuration tracks how long someone spends on an individual page.
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PageSessionDuration = promauto.NewSummaryVec(
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prometheus.SummaryOpts{
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Namespace: namespace,
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Subsystem: page,
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Name: "session_seconds",
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Help: "how long someone spent on a given page",
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Objectives: defaultObjectives,
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},
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[]string{"domain", "path", "country"},
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)
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// PageSessionsActive provides an approximation of the number of sessions that are currently observing the page.
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PageSessionsActive = promauto.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: page,
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Name: "sessions_active",
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Help: "the number of current sessions for a given page",
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},
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[]string{"domain", "path", "country"},
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)
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)
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