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https://github.com/prometheus-community/postgres_exporter
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4e521d460e
* Fix bugs mentioned in #908 These collectors are disabled by default, so unless enabled, they are not tested regularly. Signed-off-by: Joe Adams <github@joeadams.io> --------- Signed-off-by: Joe Adams <github@joeadams.io>
85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
// Copyright 2023 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package collector
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import (
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"context"
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"github.com/go-kit/log"
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"github.com/prometheus/client_golang/prometheus"
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)
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const statActivityAutovacuumSubsystem = "stat_activity_autovacuum"
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func init() {
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registerCollector(statActivityAutovacuumSubsystem, defaultDisabled, NewPGStatActivityAutovacuumCollector)
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}
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type PGStatActivityAutovacuumCollector struct {
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log log.Logger
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}
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func NewPGStatActivityAutovacuumCollector(config collectorConfig) (Collector, error) {
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return &PGStatActivityAutovacuumCollector{log: config.logger}, nil
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}
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var (
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statActivityAutovacuumAgeInSeconds = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, statActivityAutovacuumSubsystem, "timestamp_seconds"),
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"Start timestamp of the vacuum process in seconds",
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[]string{"relname"},
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prometheus.Labels{},
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)
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statActivityAutovacuumQuery = `
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SELECT
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SPLIT_PART(query, '.', 2) AS relname,
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EXTRACT(EPOCH FROM xact_start) AS timestamp_seconds
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FROM
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pg_catalog.pg_stat_activity
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WHERE
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query LIKE 'autovacuum:%'
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`
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)
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func (PGStatActivityAutovacuumCollector) Update(ctx context.Context, instance *instance, ch chan<- prometheus.Metric) error {
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db := instance.getDB()
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rows, err := db.QueryContext(ctx,
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statActivityAutovacuumQuery)
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if err != nil {
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return err
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}
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defer rows.Close()
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for rows.Next() {
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var relname string
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var ageInSeconds float64
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if err := rows.Scan(&relname, &ageInSeconds); err != nil {
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return err
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}
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ch <- prometheus.MustNewConstMetric(
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statActivityAutovacuumAgeInSeconds,
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prometheus.GaugeValue,
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ageInSeconds, relname,
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)
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}
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if err := rows.Err(); err != nil {
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return err
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}
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return nil
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}
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