go delete success from more than 12h ago

cmd/pinger/main.go

@@ -42,6 +42,7 @@ func run(ctx context.Context) error {
 		defer wg.Wait()
 		for _, foo := range []func(context.Context) error{
 			s.pingAndRecord,
+			s.collectGarbage,
 			s.listen,
 		} {
 			foo := foo
@@ -141,6 +142,27 @@ func (s S) listen(ctx context.Context) error {
 	return nil
 }
 
+func (s S) collectGarbage(ctx context.Context) error {
+	c := time.NewTicker(time.Hour)
+	defer c.Stop()
+
+	for range c.C {
+		if _, err := s.ExecContext(ctx, `
+			DELETE FROM "pinger_pings"
+			WHERE
+				start < $1
+				AND (
+					ms < 100
+					OR ok
+				)
+		`, time.Now().Add(-1*12*time.Hour).Unix()); err != nil {
+			log.Println("!", err)
+		}
+	}
+
+	return nil
+}
+
 func (s S) pingAndRecord(ctx context.Context) error {
 	ctx, can := context.WithCancel(ctx)
 	defer can()