Add func comments

Author: diogonicoleti

gauges/basics.go

@@ -6,11 +6,12 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+// Up returns if database is up and accepting connections
 func (g *Gauges) Up() prometheus.Gauge {
 	var gauge = prometheus.NewGauge(
 		prometheus.GaugeOpts{
 			Name:        "postgresql_up",
-			Help:        "Dabatase is up and accepting connections",
+			Help:        "Database is up and accepting connections",
 			ConstLabels: g.labels,
 		},
 	)
@@ -27,6 +28,7 @@ func (g *Gauges) Up() prometheus.Gauge {
 	return gauge
 }
 
+// Size returns the database size in bytes
 func (g *Gauges) Size() prometheus.Gauge {
 	return g.new(
 		prometheus.GaugeOpts{
@@ -38,22 +40,24 @@ func (g *Gauges) Size() prometheus.Gauge {
 	)
 }
 
+// TempSize returns the database total amount of data written to temporary files in bytes
 func (g *Gauges) TempSize() prometheus.Gauge {
 	return g.new(
 		prometheus.GaugeOpts{
 			Name:        "postgresql_temp_bytes",
-			Help:        "Temp size in bytes",
+			Help:        "Database total amount of data written to temporary files in bytes",
 			ConstLabels: g.labels,
 		},
 		"SELECT temp_bytes FROM pg_stat_database WHERE datname = current_database()",
 	)
 }
 
+// TempFiles returns the number of temporary files created by queries in this database.
 func (g *Gauges) TempFiles() prometheus.Gauge {
 	return g.new(
 		prometheus.GaugeOpts{
 			Name:        "postgresql_temp_files",
-			Help:        "Count of temp files",
+			Help:        "Number of temporary files created by queries in this database.",
 			ConstLabels: g.labels,
 		},
 		"SELECT temp_files FROM pg_stat_database WHERE datname = current_database()",