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
@@ -62,10 +63,10 @@ func (s S) init(ctx context.Context) error {
 			, addr TEXT NOT NULL UNIQUE
 		)`,
 		`CREATE TABLE IF NOT EXISTS "pinger_pings" (
-			start TIMESTAMP NOT NULL 
+			start TIMESTAMP NOT NULL
 			, ms NUMBER NOT NULL
 			, ok BOOLEAN NOT NULL DEFAULT false
-			, to_id NUMBER 
+			, to_id NUMBER
 			, FOREIGN KEY (to_id) REFERENCES "pinger_to"(id)
 		)`,
 		//`ALTER TABLE "pinger_pings" SET UNLOGGED`,
@@ -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()
@@ -183,7 +205,7 @@ func (s S) pingAndRecord(ctx context.Context) error {
 	go func() {
 		for record := range records {
 			if _, err := s.ExecContext(ctx, `
-				INSERT INTO "pinger_pings" 
+				INSERT INTO "pinger_pings"
 				(start, ms, ok, to_id)
 				VALUES
 				($1, $2, $3, $4)