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Expose pg_current_wal_lsn_bytes (#307)

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Michael Kaye 2019-10-30 03:57:54 +00:00 committed by Will Rouesnel
parent e362f444aa
commit d6f7ff1641
1 changed files with 2 additions and 0 deletions
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2
cmd/postgres_exporter/postgres_exporter.go
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@ -242,6 +242,7 @@ var builtinMetricMaps = map[string]map[string]ColumnMapping{
"restart_lsn": {DISCARD, "The address (LSN) of oldest WAL which still might be required by the consumer of this slot and thus won't be automatically removed during checkpoints", nil, nil},
"pg_current_xlog_location": {DISCARD, "pg_current_xlog_location", nil, nil},
"pg_current_wal_lsn": {DISCARD, "pg_current_xlog_location", nil, semver.MustParseRange(">=10.0.0")},
"pg_current_wal_lsn_bytes": {GAUGE, "WAL position in bytes", nil, semver.MustParseRange(">=10.0.0")},
"pg_xlog_location_diff": {GAUGE, "Lag in bytes between master and slave", nil, semver.MustParseRange(">=9.2.0 <10.0.0")},
"pg_wal_lsn_diff": {GAUGE, "Lag in bytes between master and slave", nil, semver.MustParseRange(">=10.0.0")},
"confirmed_flush_lsn": {DISCARD, "LSN position a consumer of a slot has confirmed flushing the data received", nil, nil},
@ -299,6 +300,7 @@ var queryOverrides = map[string][]OverrideQuery{
`
SELECT *,
(case pg_is_in_recovery() when 't' then null else pg_current_wal_lsn() end) AS pg_current_wal_lsn,
(case pg_is_in_recovery() when 't' then null else pg_wal_lsn_diff(pg_current_wal_lsn(), pg_lsn('0/0'))::float end) AS pg_current_wal_lsn_bytes,
(case pg_is_in_recovery() when 't' then null else pg_wal_lsn_diff(pg_current_wal_lsn(), replay_lsn)::float end) AS pg_wal_lsn_diff
FROM pg_stat_replication
`,