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stat_user_tables: Add total size metric (#904)

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Signed-off-by: David Cook <dcook@divviup.org>
This commit is contained in:
David Cook 2023-09-12 08:07:36 -05:00 committed by GitHub
parent 0b6d9860ab
commit 31ef4ed5a2
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 28 additions and 6 deletions
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24
collector/pg_stat_user_tables.go
View File

@ -150,6 +150,12 @@ var (
[]string{"datname", "schemaname", "relname"},
prometheus.Labels{},
)
statUserTablesTotalSize = prometheus.NewDesc(
prometheus.BuildFQName(namespace, userTableSubsystem, "size_bytes"),
"Total disk space used by this table, in bytes, including all indexes and TOAST data",
[]string{"datname", "schemaname", "relname"},
prometheus.Labels{},
)
statUserTablesQuery = `SELECT
current_database() datname,
@ -173,7 +179,8 @@ var (
vacuum_count,
autovacuum_count,
analyze_count,
autoanalyze_count
autoanalyze_count,
pg_total_relation_size(relid) as total_size
FROM
pg_stat_user_tables`
)
@ -191,10 +198,10 @@ func (c *PGStatUserTablesCollector) Update(ctx context.Context, instance *instan
for rows.Next() {
var datname, schemaname, relname sql.NullString
var seqScan, seqTupRead, idxScan, idxTupFetch, nTupIns, nTupUpd, nTupDel, nTupHotUpd, nLiveTup, nDeadTup,
nModSinceAnalyze, vacuumCount, autovacuumCount, analyzeCount, autoanalyzeCount sql.NullInt64
nModSinceAnalyze, vacuumCount, autovacuumCount, analyzeCount, autoanalyzeCount, totalSize sql.NullInt64
var lastVacuum, lastAutovacuum, lastAnalyze, lastAutoanalyze sql.NullTime
if err := rows.Scan(&datname, &schemaname, &relname, &seqScan, &seqTupRead, &idxScan, &idxTupFetch, &nTupIns, &nTupUpd, &nTupDel, &nTupHotUpd, &nLiveTup, &nDeadTup, &nModSinceAnalyze, &lastVacuum, &lastAutovacuum, &lastAnalyze, &lastAutoanalyze, &vacuumCount, &autovacuumCount, &analyzeCount, &autoanalyzeCount); err != nil {
if err := rows.Scan(&datname, &schemaname, &relname, &seqScan, &seqTupRead, &idxScan, &idxTupFetch, &nTupIns, &nTupUpd, &nTupDel, &nTupHotUpd, &nLiveTup, &nDeadTup, &nModSinceAnalyze, &lastVacuum, &lastAutovacuum, &lastAnalyze, &lastAutoanalyze, &vacuumCount, &autovacuumCount, &analyzeCount, &autoanalyzeCount, &totalSize); err != nil {
return err
}
@ -419,6 +426,17 @@ func (c *PGStatUserTablesCollector) Update(ctx context.Context, instance *instan
autoanalyzeCountMetric,
datnameLabel, schemanameLabel, relnameLabel,
)
totalSizeMetric := 0.0
if totalSize.Valid {
totalSizeMetric = float64(totalSize.Int64)
}
ch <- prometheus.MustNewConstMetric(
statUserTablesTotalSize,
prometheus.GaugeValue,
totalSizeMetric,
datnameLabel, schemanameLabel, relnameLabel,
)
}
if err := rows.Err(); err != nil {

10
collector/pg_stat_user_tables_test.go
View File

@ -71,7 +71,8 @@ func TestPGStatUserTablesCollector(t *testing.T) {
"vacuum_count",
"autovacuum_count",
"analyze_count",
"autoanalyze_count"}
"autoanalyze_count",
"total_size"}
rows := sqlmock.NewRows(columns).
AddRow("postgres",
"public",
@ -94,7 +95,8 @@ func TestPGStatUserTablesCollector(t *testing.T) {
11,
12,
13,
14)
14,
15)
mock.ExpectQuery(sanitizeQuery(statUserTablesQuery)).WillReturnRows(rows)
ch := make(chan prometheus.Metric)
go func() {
@ -170,7 +172,8 @@ func TestPGStatUserTablesCollectorNullValues(t *testing.T) {
"vacuum_count",
"autovacuum_count",
"analyze_count",
"autoanalyze_count"}
"autoanalyze_count",
"total_size"}
rows := sqlmock.NewRows(columns).
AddRow("postgres",
nil,
@ -193,6 +196,7 @@ func TestPGStatUserTablesCollectorNullValues(t *testing.T) {
nil,
nil,
nil,
nil,
nil)
mock.ExpectQuery(sanitizeQuery(statUserTablesQuery)).WillReturnRows(rows)
ch := make(chan prometheus.Metric)