diff --git a/go-socks-lb/manager.go b/go-socks-lb/manager.go
index 174ff2e..ce4e107 100644
--- a/go-socks-lb/manager.go
+++ b/go-socks-lb/manager.go
@@ -144,7 +144,8 @@ func NewPM(confFp string) (*ProxyManager, error) {
 	pm.Cache = NewQueueMap()
 	pm.applyWeight()
 	// go pm.keepClearingCache()
-	go pm.dynamicWeightLoader()
+	pm.dynamicWeightLoader()
+	pm.listenToClearCache()
 	return &pm, nil
 }
 func (pm *ProxyManager) DescribeLoadBalanceMode() string {
@@ -227,24 +228,16 @@ func (pm *ProxyManager) Get(addr string) (string, bool) {
 	}
 }
 
-// func (pm *ProxyManager) ClearCache() {
-// 	// fmt.Println("clearing cache")
-// 	pm.mux.Lock()
-// 	pm.Cache = New()
-// 	pm.mux.Unlock()
-// 	// fmt.Println("after:", pm.Cache)
-// }
-
-// func (pm *ProxyManager) keepClearingCache() {
-// 	interval := pm.CacheCleanInterval
-// 	if interval <= 0 {
-// 		return
-// 	}
-// 	for {
-// 		time.Sleep(time.Duration(interval) * time.Second)
-// 		pm.ClearCache()
-// 	}
-// }
+func (pm *ProxyManager) listenToClearCache() {
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGUSR2, syscall.SIGTERM)
+	go func() {
+		<-sigs
+		pm.mux.Lock()
+		pm.Cache = NewQueueMap()
+		pm.mux.Unlock()
+	}()
+}
 
 func (pm *ProxyManager) dynamicWeightLoader() {
 	sigs := make(chan os.Signal, 1)
diff --git a/o_manager.py b/o_manager.py
index c68e294..20c102b 100644
--- a/o_manager.py
+++ b/o_manager.py
@@ -195,6 +195,13 @@ class OManager:
             # else:
                 #print("weight not changed, weights:", new_weights)
 
+    def clear_cache(self):
+        for pid in self.pids:
+            try:
+                os.kill(pid, signal.SIGUSR2)
+            except:
+                print("error clear cache of", pid)
+
     async def run_cmd(self, cmd):
         while True:
             print("Manager trying to start go")
diff --git a/test.py b/test.py
index 5200d25..813a294 100644
--- a/test.py
+++ b/test.py
@@ -95,6 +95,11 @@ class RemoveInstatnceHandler(tornado.web.RequestHandler):
             self.write("remove all")
 
 
+class ClearCacheInstatnceHandler(tornado.web.RequestHandler):
+    def get(self):
+        om.clear_cache()
+
+
 def make_app():
     return tornado.web.Application([
         (r"/", MainHandler),
@@ -103,6 +108,7 @@ def make_app():
         (r"/start", StartInstatnceHandler),
         (r"/stop", StopInstatnceHandler),
         (r"/remove", RemoveInstatnceHandler),
+        (r"/clear_cache", ClearCacheInstatnceHandler),
     ])