diff --git a/src/dataobj/stra.go b/src/dataobj/stra.go
index df1f1627..471f64ef 100644
--- a/src/dataobj/stra.go
+++ b/src/dataobj/stra.go
@@ -53,4 +53,3 @@ type AlertUpgrade struct {
 	Duration int     `json:"duration"`
 	Level    int     `json:"level"`
 }
-
diff --git a/src/modules/index/cache/counter_map.go b/src/modules/index/cache/counter_map.go
index af7db472..46bc59d4 100644
--- a/src/modules/index/cache/counter_map.go
+++ b/src/modules/index/cache/counter_map.go
@@ -14,7 +14,7 @@ type CounterTsMap struct {
 }
 
 func NewCounterTsMap() *CounterTsMap {
-	return &CounterTsMap{M: make(map[string]int64, 0)}
+	return &CounterTsMap{M: make(map[string]int64)}
 }
 
 func (c *CounterTsMap) Set(counter string, ts int64) {
diff --git a/src/modules/index/cache/endpoint_map.go b/src/modules/index/cache/endpoint_map.go
index ba7d08f4..a299be7f 100644
--- a/src/modules/index/cache/endpoint_map.go
+++ b/src/modules/index/cache/endpoint_map.go
@@ -37,8 +37,6 @@ func (e *EndpointIndexMap) Push(item dataobj.IndexModel, now int64) {
 		return
 	}
 	metricIndex.Set(item, counter, now)
-
-	return
 }
 
 func (e *EndpointIndexMap) Clean(timeDuration int64) {
@@ -123,7 +121,7 @@ func (e *EndpointIndexMap) GetEndpoints() []string {
 	length := len(e.M)
 	ret := make([]string, length)
 	i := 0
-	for endpoint, _ := range e.M {
+	for endpoint := range e.M {
 		ret[i] = endpoint
 		i++
 	}
diff --git a/src/modules/index/cache/endpoints.go b/src/modules/index/cache/endpoints.go
index aae9e2cb..c9b4880f 100644
--- a/src/modules/index/cache/endpoints.go
+++ b/src/modules/index/cache/endpoints.go
@@ -69,6 +69,4 @@ func reportEndpoint(endpoints []interface{}) {
 		}
 		time.Sleep(100 * time.Millisecond)
 	}
-
-	return
 }
diff --git a/src/modules/index/cache/indexdb.go b/src/modules/index/cache/indexdb.go
index cd000a31..3a8dbaae 100644
--- a/src/modules/index/cache/indexdb.go
+++ b/src/modules/index/cache/indexdb.go
@@ -41,7 +41,7 @@ var semaPermanence = semaphore.NewSemaphore(1)
 func InitDB(cfg CacheSection) {
 	Config = cfg
 
-	IndexDB = &EndpointIndexMap{M: make(map[string]*MetricIndexMap, 0)}
+	IndexDB = &EndpointIndexMap{M: make(map[string]*MetricIndexMap)}
 	NewEndpoints = list.NewSafeListLimited(100000)
 
 	Rebuild(Config.PersistDir, Config.RebuildWorker)
diff --git a/src/modules/index/cache/metric_map.go b/src/modules/index/cache/metric_map.go
index 222f3d70..4c90337b 100644
--- a/src/modules/index/cache/metric_map.go
+++ b/src/modules/index/cache/metric_map.go
@@ -78,7 +78,6 @@ func (m *MetricIndexMap) DelMetric(metric string) {
 	m.Lock()
 	defer m.Unlock()
 	delete(m.Data, metric)
-	return
 }
 
 func (m *MetricIndexMap) Len() int {
@@ -106,7 +105,7 @@ func (m *MetricIndexMap) GetMetrics() []string {
 	m.RLock()
 	defer m.RUnlock()
 	var metrics []string
-	for k, _ := range m.Data {
+	for k := range m.Data {
 		metrics = append(metrics, k)
 	}
 	return metrics
diff --git a/src/modules/index/cache/tag.go b/src/modules/index/cache/tag.go
index 04ff6413..f405b6ce 100644
--- a/src/modules/index/cache/tag.go
+++ b/src/modules/index/cache/tag.go
@@ -16,8 +16,9 @@ func (t TagPairs) Len() int {
 }
 
 func (t TagPairs) Less(i, j int) bool {
-	return t[i].Key > t[i].Key
+	return t[i].Key > t[j].Key
 }
+
 func (t TagPairs) Swap(i, j int) {
 	t[i], t[j] = t[j], t[i]
 }
@@ -135,7 +136,7 @@ func TagPairToMap(tagPairs []*TagPair) map[string][]string {
 
 func GetSortTags(tagMap map[string][]string) []*TagPair {
 	var keys []string
-	for key, _ := range tagMap {
+	for key := range tagMap {
 		keys = append(keys, key)
 	}
 	sort.Strings(keys)
diff --git a/src/modules/index/cache/tag_map.go b/src/modules/index/cache/tag_map.go
index dba7a5c8..f3de4b0c 100644
--- a/src/modules/index/cache/tag_map.go
+++ b/src/modules/index/cache/tag_map.go
@@ -33,7 +33,7 @@ func (t *TagkvIndex) GetTagkv() []*TagPair {
 
 	for k, vm := range t.Tagkv {
 		var vs []string
-		for v, _ := range vm {
+		for v := range vm {
 			vs = append(vs, v)
 		}
 		tagkv := TagPair{
@@ -53,7 +53,7 @@ func (t *TagkvIndex) GetTagkvMap() map[string][]string {
 
 	for k, vm := range t.Tagkv {
 		var vs []string
-		for v, _ := range vm {
+		for v := range vm {
 			vs = append(vs, v)
 		}
 
diff --git a/src/modules/index/http/routes/index_router.go b/src/modules/index/http/routes/index_router.go
index e5233fe9..2e41b73c 100644
--- a/src/modules/index/http/routes/index_router.go
+++ b/src/modules/index/http/routes/index_router.go
@@ -125,7 +125,7 @@ func GetTagPairs(c *gin.Context) {
 
 		for tagk, tagvFilter := range tagkvFilter {
 			tagvs := []string{}
-			for v, _ := range tagvFilter {
+			for v := range tagvFilter {
 				tagvs = append(tagvs, v)
 			}
 			tagkv := &cache.TagPair{
@@ -305,7 +305,7 @@ func GetIndexByClude(c *gin.Context) {
 			var err error
 			var tags []string
 			if len(includeList) == 0 && len(excludeList) == 0 {
-				for counter, _ := range counterMap {
+				for counter := range counterMap {
 					tagList = append(tagList, counter)
 				}
 				resp = append(resp, XcludeResp{
diff --git a/src/modules/index/rpc/push.go b/src/modules/index/rpc/push.go
index 9bfaf78f..1b31364b 100644
--- a/src/modules/index/rpc/push.go
+++ b/src/modules/index/rpc/push.go
@@ -42,5 +42,4 @@ func push(args []*dataobj.IndexModel, reply *dataobj.IndexResp) {
 
 	reply.Total = len(args)
 	reply.Latency = (time.Now().UnixNano() - start.UnixNano()) / 1000000
-	return
 }
diff --git a/src/modules/judge/backend/query/query.go b/src/modules/judge/backend/query/query.go
index b106bad0..2ed4c569 100644
--- a/src/modules/judge/backend/query/query.go
+++ b/src/modules/judge/backend/query/query.go
@@ -30,7 +30,7 @@ type IndexRequest struct {
 type Counter struct {
 	Counter string `json:"counter"`
 	Step    int    `json:"step"`
-	Dstype  string `json:"dstype`
+	Dstype  string `json:"dstype"`
 }
 
 // 执行Query操作
diff --git a/src/modules/judge/cache/likedlist.go b/src/modules/judge/cache/linkedlist.go
similarity index 72%
rename from src/modules/judge/cache/likedlist.go
rename to src/modules/judge/cache/linkedlist.go
index c914813b..eb7a414b 100644
--- a/src/modules/judge/cache/likedlist.go
+++ b/src/modules/judge/cache/linkedlist.go
@@ -12,32 +12,32 @@ type SafeLinkedList struct {
 	L *list.List
 }
 
-func (this *SafeLinkedList) Front() *list.Element {
-	this.RLock()
-	defer this.RUnlock()
-	return this.L.Front()
+func (ll *SafeLinkedList) Front() *list.Element {
+	ll.RLock()
+	defer ll.RUnlock()
+	return ll.L.Front()
 }
 
-func (this *SafeLinkedList) Len() int {
-	this.RLock()
-	defer this.RUnlock()
-	return this.L.Len()
+func (ll *SafeLinkedList) Len() int {
+	ll.RLock()
+	defer ll.RUnlock()
+	return ll.L.Len()
 }
 
 // @return needJudge 如果是false不需要做judge，因为新上来的数据不合法
-func (this *SafeLinkedList) PushFrontAndMaintain(v *dataobj.JudgeItem, maxCount int) bool {
-	this.Lock()
-	defer this.Unlock()
+func (ll *SafeLinkedList) PushFrontAndMaintain(v *dataobj.JudgeItem, maxCount int) bool {
+	ll.Lock()
+	defer ll.Unlock()
 
-	sz := this.L.Len()
+	sz := ll.L.Len()
 	if sz > 0 {
 		// 新push上来的数据有可能重复了，或者timestamp不对，这种数据要丢掉
-		if v.Timestamp <= this.L.Front().Value.(*dataobj.JudgeItem).Timestamp || v.Timestamp <= 0 {
+		if v.Timestamp <= ll.L.Front().Value.(*dataobj.JudgeItem).Timestamp || v.Timestamp <= 0 {
 			return false
 		}
 	}
 
-	this.L.PushFront(v)
+	ll.L.PushFront(v)
 
 	sz++
 	if sz <= maxCount {
@@ -46,7 +46,7 @@ func (this *SafeLinkedList) PushFrontAndMaintain(v *dataobj.JudgeItem, maxCount
 
 	del := sz - maxCount
 	for i := 0; i < del; i++ {
-		this.L.Remove(this.L.Back())
+		ll.L.Remove(ll.L.Back())
 	}
 
 	return true
@@ -54,19 +54,19 @@ func (this *SafeLinkedList) PushFrontAndMaintain(v *dataobj.JudgeItem, maxCount
 
 // @param limit 至多返回这些，如果不够，有多少返回多少
 // @return bool isEnough
-func (this *SafeLinkedList) HistoryData(limit int) ([]*dataobj.RRDData, bool) {
+func (ll *SafeLinkedList) HistoryData(limit int) ([]*dataobj.RRDData, bool) {
 	if limit < 1 {
 		// 其实limit不合法，此处也返回false吧，上层代码要注意
 		// 因为false通常使上层代码进入异常分支，这样就统一了
 		return []*dataobj.RRDData{}, false
 	}
 
-	size := this.Len()
+	size := ll.Len()
 	if size == 0 {
 		return []*dataobj.RRDData{}, false
 	}
 
-	firstElement := this.Front()
+	firstElement := ll.Front()
 	firstItem := firstElement.Value.(*dataobj.JudgeItem)
 
 	var vs []*dataobj.RRDData
diff --git a/src/modules/judge/judge/judge.go b/src/modules/judge/judge/judge.go
index 43726c88..78698949 100644
--- a/src/modules/judge/judge/judge.go
+++ b/src/modules/judge/judge/judge.go
@@ -89,7 +89,7 @@ func Judge(stra *model.Stra, exps []model.Exp, historyData []*dataobj.RRDData, f
 
 	defer func() {
 		if len(exps) == 1 {
-			bytes, err := json.Marshal(history)
+			bs, err := json.Marshal(history)
 			if err != nil {
 				logger.Error("Marshal history:%v err:%v", history, err)
 			}
@@ -98,7 +98,7 @@ func Judge(stra *model.Stra, exps []model.Exp, historyData []*dataobj.RRDData, f
 				Etime:     now,
 				Endpoint:  firstItem.Endpoint,
 				Info:      info,
-				Detail:    string(bytes),
+				Detail:    string(bs),
 				Value:     value,
 				Partition: redi.Config.Prefix + "/event/p" + strconv.Itoa(stra.Priority),
 				Sid:       stra.Id,
@@ -134,7 +134,7 @@ func Judge(stra *model.Stra, exps []model.Exp, historyData []*dataobj.RRDData, f
 				return
 			}
 
-			for i, _ := range respData {
+			for i := range respData {
 				firstItem.Endpoint = respData[i].Endpoint
 				firstItem.Tags = getTags(respData[i].Counter)
 				firstItem.Step = respData[i].Step
@@ -153,7 +153,7 @@ func Judge(stra *model.Stra, exps []model.Exp, historyData []*dataobj.RRDData, f
 				logger.Errorf("stra:%v get query data err:%v", stra, err)
 				return
 			}
-			for i, _ := range respData {
+			for i := range respData {
 				firstItem.Endpoint = respData[i].Endpoint
 				firstItem.Tags = getTags(respData[i].Counter)
 				firstItem.Step = respData[i].Step
@@ -204,7 +204,7 @@ func judgeItemWithStrategy(stra *model.Stra, historyData []*dataobj.RRDData, exp
 
 		var sum float64
 		data := respItems[0]
-		for i, _ := range data.Values {
+		for i := range data.Values {
 			sum += float64(data.Values[i].Value)
 		}
 
diff --git a/src/modules/judge/judge/nodata.go b/src/modules/judge/judge/nodata.go
index a2e8ddd8..5a7c406c 100644
--- a/src/modules/judge/judge/nodata.go
+++ b/src/modules/judge/judge/nodata.go
@@ -18,7 +18,7 @@ func NodataJudge(concurrency int) {
 	if concurrency < 1 {
 		concurrency = 1000
 	}
-	nodataJob = semaphore.NewSemaphore(1000)
+	nodataJob = semaphore.NewSemaphore(concurrency)
 
 	t1 := time.NewTicker(time.Duration(9000) * time.Millisecond)
 	nodataJudge()