diff --git a/apps/dao/traffic.go b/apps/dao/traffic.go
index 44ba868..f1e9202 100644
--- a/apps/dao/traffic.go
+++ b/apps/dao/traffic.go
@@ -67,3 +67,36 @@ func UpsertTrafficAggregateDaily(peerId int64, dayStart int64, rxBytes int64, tx
 func gormExprAdd(column string, delta int64) interface{} {
 	return gorm.Expr(fmt.Sprintf("%s + ?", column), delta)
 }
+
+func CleanupTrafficSample(olderThanMs int64) error {
+	if !tableExists("traffic_sample") {
+		return nil
+	}
+	if tx := sqliteDB.Exec("DELETE FROM traffic_sample WHERE sampled_at < ?", olderThanMs); tx.Error != nil {
+		logrus.Errorf("%v", tx.Error)
+		return errors.New(constant.SysError)
+	}
+	return nil
+}
+
+func CleanupTrafficAggregateHourly(olderThanMs int64) error {
+	if !tableExists("traffic_aggregate_hourly") {
+		return nil
+	}
+	if tx := sqliteDB.Exec("DELETE FROM traffic_aggregate_hourly WHERE hour_start < ?", olderThanMs); tx.Error != nil {
+		logrus.Errorf("%v", tx.Error)
+		return errors.New(constant.SysError)
+	}
+	return nil
+}
+
+func CleanupTrafficAggregateDaily(olderThanMs int64) error {
+	if !tableExists("traffic_aggregate_daily") {
+		return nil
+	}
+	if tx := sqliteDB.Exec("DELETE FROM traffic_aggregate_daily WHERE day_start < ?", olderThanMs); tx.Error != nil {
+		logrus.Errorf("%v", tx.Error)
+		return errors.New(constant.SysError)
+	}
+	return nil
+}
diff --git a/apps/frontend/src/views/dashboard/index.vue b/apps/frontend/src/views/dashboard/index.vue
index d71a638..0f15098 100644
--- a/apps/frontend/src/views/dashboard/index.vue
+++ b/apps/frontend/src/views/dashboard/index.vue
@@ -47,7 +47,6 @@
             <el-radio-button label="1h">1h</el-radio-button>
             <el-radio-button label="24h">24h</el-radio-button>
             <el-radio-button label="7d">7d</el-radio-button>
-            <el-radio-button label="30d">30d</el-radio-button>
           </el-radio-group>
         </div>
       </template>
diff --git a/apps/middleware/cron.go b/apps/middleware/cron.go
index c73f530..71dfc80 100644
--- a/apps/middleware/cron.go
+++ b/apps/middleware/cron.go
@@ -23,10 +23,10 @@ func InitCron() error {
 		logrus.Errorf("cron add func CollectMetricsSnapshot err: %v", err)
 		return errors.New("cron add func CollectMetricsSnapshot err")
 	}
-	_, err = c.AddFunc("@every 10m", service.CleanupMetricsRetention)
+	_, err = c.AddFunc("@every 1h", service.CleanupStatsRetention)
 	if err != nil {
-		logrus.Errorf("cron add func CleanupMetricsRetention err: %v", err)
-		return errors.New("cron add func CleanupMetricsRetention err")
+		logrus.Errorf("cron add func CleanupStatsRetention err: %v", err)
+		return errors.New("cron add func CleanupStatsRetention err")
 	}
 	resetTrafficCron, err := dao.GetConfig("key = ?", constant.ResetTrafficCron)
 	if err != nil {
diff --git a/apps/service/cron.go b/apps/service/cron.go
index 9c96a39..7711ac5 100644
--- a/apps/service/cron.go
+++ b/apps/service/cron.go
@@ -72,7 +72,6 @@ func saveAccountTraffic(apiPort int64, trafficStatsSecret string) {
 
 	nowMs := time.Now().UnixMilli()
 	hourStart := nowMs - (nowMs % int64(time.Hour/time.Millisecond))
-	dayStart := nowMs - (nowMs % int64(24*time.Hour/time.Millisecond))
 
 	for key, traffic := range users {
 		rxBytes := traffic.Rx
@@ -115,7 +114,6 @@ func saveAccountTraffic(apiPort int64, trafficStatsSecret string) {
 		}
 
 		_ = dao.UpsertTrafficAggregateHourly(*peer.Id, hourStart, rxBytes, txBytes)
-		_ = dao.UpsertTrafficAggregateDaily(*peer.Id, dayStart, rxBytes, txBytes)
 	}
 }
 func kickAccount(apiPort int64, trafficStatsSecret string) {
diff --git a/apps/service/dashboard.go b/apps/service/dashboard.go
index bcda1da..2b52e7b 100644
--- a/apps/service/dashboard.go
+++ b/apps/service/dashboard.go
@@ -46,28 +46,29 @@ func DashboardTimeseries(rangeKey string) (vo.DashboardTimeseriesVo, error) {
 	fromMs := nowMs - int64(24*time.Hour/time.Millisecond)
 	bucketMs := int64(5 * time.Minute / time.Millisecond)
 	source := "sample"
-	r := strings.TrimSpace(rangeKey)
-	if r == "1h" {
+	r := "24h"
+
+	switch strings.TrimSpace(rangeKey) {
+	case "1h":
 		fromMs = nowMs - int64(time.Hour/time.Millisecond)
 		bucketMs = int64(time.Minute / time.Millisecond)
 		source = "sample"
-	} else if r == "7d" {
+		r = "1h"
+	case "7d":
 		fromMs = nowMs - int64(7*24*time.Hour/time.Millisecond)
 		bucketMs = int64(time.Hour / time.Millisecond)
 		source = "hourly"
-	} else if r == "30d" {
-		fromMs = nowMs - int64(30*24*time.Hour/time.Millisecond)
-		bucketMs = int64(24 * time.Hour / time.Millisecond)
-		source = "daily"
-		r = "30d"
-	} else if r == "" {
-		r = "24h"
+		r = "7d"
+	case "24h", "":
+		fromMs = nowMs - int64(24*time.Hour/time.Millisecond)
 		bucketMs = int64(5 * time.Minute / time.Millisecond)
 		source = "sample"
-	} else {
 		r = "24h"
+	default:
+		fromMs = nowMs - int64(24*time.Hour/time.Millisecond)
 		bucketMs = int64(5 * time.Minute / time.Millisecond)
 		source = "sample"
+		r = "24h"
 	}
 
 	traffic, err := dao.DashboardTrafficTimeseries(fromMs, nowMs, bucketMs, source)
@@ -92,8 +93,6 @@ func DashboardTopPeers(rangeKey string, limit int) ([]vo.DashboardTopPeerVo, err
 	fromMs := nowMs - int64(24*time.Hour/time.Millisecond)
 	if strings.TrimSpace(rangeKey) == "7d" {
 		fromMs = nowMs - int64(7*24*time.Hour/time.Millisecond)
-	} else if strings.TrimSpace(rangeKey) == "30d" {
-		fromMs = nowMs - int64(30*24*time.Hour/time.Millisecond)
 	}
 	return dao.DashboardTopPeers(fromMs, nowMs, limit)
 }
diff --git a/apps/service/metrics_collector.go b/apps/service/metrics_collector.go
index 900a5f9..91a0f5a 100644
--- a/apps/service/metrics_collector.go
+++ b/apps/service/metrics_collector.go
@@ -14,6 +14,7 @@ import (
 )
 
 const hysteriaVersionCacheTTL = 15 * time.Minute
+const statsRetention = 7 * 24 * time.Hour
 
 var ansiRe = regexp.MustCompile(`\x1b\[[0-9;]*[A-Za-z]`)
 var hysteriaVersionRe = regexp.MustCompile(`(?i)v?\d+\.\d+\.\d+(?:[-+][0-9A-Za-z.-]+)?`)
@@ -150,9 +151,19 @@ func CollectMetricsSnapshot() {
 	_ = dao.SaveMetricSample(metric)
 }
 
-func CleanupMetricsRetention() {
-	cutoff := time.Now().Add(-72 * time.Hour).UnixMilli()
-	_ = dao.CleanupMetricSample(cutoff)
+func CleanupStatsRetention() {
+	now := time.Now()
+	cutoffMs := now.Add(-statsRetention).UnixMilli()
+
+	hourMs := int64(time.Hour / time.Millisecond)
+	dayMs := int64(24 * time.Hour / time.Millisecond)
+	cutoffHour := cutoffMs - (cutoffMs % hourMs)
+	cutoffDay := cutoffMs - (cutoffMs % dayMs)
+
+	_ = dao.CleanupMetricSample(cutoffMs)
+	_ = dao.CleanupTrafficSample(cutoffMs)
+	_ = dao.CleanupTrafficAggregateHourly(cutoffHour)
+	_ = dao.CleanupTrafficAggregateDaily(cutoffDay)
 }
 
 func DashboardSnapshot() metricsSnapshot {