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Include all idle processes in the process idle metrics

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Signed-off-by: Tom Hughes <tom@compton.nu>
This commit is contained in:
Tom Hughes 2023-07-04 11:14:36 +01:00
parent 6b56e2f057
commit a8b86cf7da
1 changed files with 18 additions and 9 deletions
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27
collector/pg_process_idle.go
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@ -40,7 +40,7 @@ func NewPGProcessIdleCollector(config collectorConfig) (Collector, error) {
var pgProcessIdleSeconds = prometheus.NewDesc( var pgProcessIdleSeconds = prometheus.NewDesc(
prometheus.BuildFQName(namespace, processIdleSubsystem, "seconds"), prometheus.BuildFQName(namespace, processIdleSubsystem, "seconds"),
"Idle time of server processes", "Idle time of server processes",
[]string{"application_name"}, []string{"state", "application_name"},
prometheus.Labels{}, prometheus.Labels{},
) )
@ -50,15 +50,17 @@ func (PGProcessIdleCollector) Update(ctx context.Context, instance *instance, ch
`WITH `WITH
metrics AS ( metrics AS (
SELECT SELECT
state,
application_name, application_name,
SUM(EXTRACT(EPOCH FROM (CURRENT_TIMESTAMP - state_change))::bigint)::float AS process_idle_seconds_sum, SUM(EXTRACT(EPOCH FROM (CURRENT_TIMESTAMP - state_change))::bigint)::float AS process_idle_seconds_sum,
COUNT(*) AS process_idle_seconds_count COUNT(*) AS process_idle_seconds_count
FROM pg_stat_activity FROM pg_stat_activity
WHERE state = 'idle' WHERE state ~ '^idle'
GROUP BY application_name GROUP BY state, application_name
), ),
buckets AS ( buckets AS (
SELECT SELECT
state,
application_name, application_name,
le, le,
SUM( SUM(
@ -70,25 +72,27 @@ func (PGProcessIdleCollector) Update(ctx context.Context, instance *instance, ch
FROM FROM
pg_stat_activity, pg_stat_activity,
UNNEST(ARRAY[1, 2, 5, 15, 30, 60, 90, 120, 300]) AS le UNNEST(ARRAY[1, 2, 5, 15, 30, 60, 90, 120, 300]) AS le
GROUP BY application_name, le GROUP BY state, application_name, le
ORDER BY application_name, le ORDER BY state, application_name, le
) )
SELECT SELECT
state,
application_name, application_name,
process_idle_seconds_sum as seconds_sum, process_idle_seconds_sum as seconds_sum,
process_idle_seconds_count as seconds_count, process_idle_seconds_count as seconds_count,
ARRAY_AGG(le) AS seconds, ARRAY_AGG(le) AS seconds,
ARRAY_AGG(bucket) AS seconds_bucket ARRAY_AGG(bucket) AS seconds_bucket
FROM metrics JOIN buckets USING (application_name) FROM metrics JOIN buckets USING (state, application_name)
GROUP BY 1, 2, 3;`) GROUP BY 1, 2, 3, 4;`)
var state sql.NullString
var applicationName sql.NullString var applicationName sql.NullString
var secondsSum sql.NullFloat64 var secondsSum sql.NullFloat64
var secondsCount sql.NullInt64 var secondsCount sql.NullInt64
var seconds []float64 var seconds []float64
var secondsBucket []int64 var secondsBucket []int64
err := row.Scan(&applicationName, &secondsSum, &secondsCount, pq.Array(&seconds), pq.Array(&secondsBucket)) err := row.Scan(&state, &applicationName, &secondsSum, &secondsCount, pq.Array(&seconds), pq.Array(&secondsBucket))
if err != nil { if err != nil {
return err return err
} }
@ -101,6 +105,11 @@ func (PGProcessIdleCollector) Update(ctx context.Context, instance *instance, ch
buckets[second] = uint64(secondsBucket[i]) buckets[second] = uint64(secondsBucket[i])
} }
stateLabel := "unknown"
if state.Valid {
stateLabel = state.String
}
applicationNameLabel := "unknown" applicationNameLabel := "unknown"
if applicationName.Valid { if applicationName.Valid {
applicationNameLabel = applicationName.String applicationNameLabel = applicationName.String
@ -117,7 +126,7 @@ func (PGProcessIdleCollector) Update(ctx context.Context, instance *instance, ch
ch <- prometheus.MustNewConstHistogram( ch <- prometheus.MustNewConstHistogram(
pgProcessIdleSeconds, pgProcessIdleSeconds,
secondsCountMetric, secondsSumMetric, buckets, secondsCountMetric, secondsSumMetric, buckets,
applicationNameLabel, stateLabel, applicationNameLabel,
) )
return nil return nil
} }