diff --git a/include/cinatra/ylt/coro_io/load_blancer.hpp b/include/cinatra/ylt/coro_io/load_blancer.hpp
index 15e7fa13..68e07e2e 100644
--- a/include/cinatra/ylt/coro_io/load_blancer.hpp
+++ b/include/cinatra/ylt/coro_io/load_blancer.hpp
@@ -158,6 +158,7 @@ class load_blancer {
     this->config_ = std::move(o.config_);
     this->lb_worker = std::move(o.lb_worker);
     this->client_pools_ = std::move(o.client_pools_);
+    return *this;
   }
   load_blancer(const load_blancer& o) = delete;
   load_blancer& operator=(const load_blancer& o) = delete;
diff --git a/include/cinatra/ylt/metric/dynamic_metric.hpp b/include/cinatra/ylt/metric/dynamic_metric.hpp
index db1f6509..dd8a9d42 100644
--- a/include/cinatra/ylt/metric/dynamic_metric.hpp
+++ b/include/cinatra/ylt/metric/dynamic_metric.hpp
@@ -96,6 +96,15 @@ class dynamic_metric_impl : public dynamic_metric {
     return map_.template copy<std::shared_ptr<metric_pair>>();
   }
 
+  void clean_expired_label() override {
+    erase_if([now = std::chrono::steady_clock::now()](auto& pair) mutable {
+      bool r = std::chrono::duration_cast<std::chrono::seconds>(
+                   now - pair.second->get_created_time())
+                   .count() >= ylt_label_max_age.count();
+      return r;
+    });
+  }
+
  protected:
   template <typename Key, typename... Args>
   std::pair<std::shared_ptr<metric_pair>, bool> try_emplace(Key&& key,
@@ -111,14 +120,7 @@ class dynamic_metric_impl : public dynamic_metric {
         },
         std::forward<Key>(key), std::forward<Args>(args)...);
   }
-  void clean_expired_label() override {
-    erase_if([now = std::chrono::steady_clock::now()](auto& pair) mutable {
-      bool r = std::chrono::duration_cast<std::chrono::seconds>(
-                   now - pair.second->get_created_time())
-                   .count() >= ylt_label_max_age.count();
-      return r;
-    });
-  }
+
   std::shared_ptr<metric_pair> find(std::span<const std::string, N> key) const {
     return map_.find(key);
   }
diff --git a/include/cinatra/ylt/metric/histogram.hpp b/include/cinatra/ylt/metric/histogram.hpp
index bc27fabe..ce897a45 100644
--- a/include/cinatra/ylt/metric/histogram.hpp
+++ b/include/cinatra/ylt/metric/histogram.hpp
@@ -188,6 +188,13 @@ class basic_dynamic_histogram : public dynamic_metric {
     bucket_counts_[bucket_index]->inc(labels_value);
   }
 
+  void clean_expired_label() override {
+    sum_->clean_expired_label();
+    for (auto &m : bucket_counts_) {
+      m->clean_expired_label();
+    }
+  }
+
   auto get_bucket_counts() { return bucket_counts_; }
 
   bool has_label_value(const std::string &label_val) override {
@@ -202,6 +209,8 @@ class basic_dynamic_histogram : public dynamic_metric {
     return sum_->has_label_value(label_value);
   }
 
+  size_t label_value_count() const { return sum_->label_value_count(); }
+
   void serialize(std::string &str) override {
     auto value_map = sum_->copy();
     if (value_map.empty()) {
diff --git a/include/cinatra/ylt/metric/summary.hpp b/include/cinatra/ylt/metric/summary.hpp
index 7d36c86e..9590bb3e 100644
--- a/include/cinatra/ylt/metric/summary.hpp
+++ b/include/cinatra/ylt/metric/summary.hpp
@@ -37,7 +37,7 @@ YLT_REFL(json_summary_t, name, help, type, labels_name, quantiles_key, metrics);
 class summary_t : public static_metric {
  public:
   summary_t(std::string name, std::string help, std::vector<double> quantiles,
-            std::chrono::seconds max_age = std::chrono::seconds{60})
+            std::chrono::seconds max_age = std::chrono::seconds{36000})
       : static_metric(MetricType::Summary, std::move(name), std::move(help)),
         quantiles_(std::move(quantiles)),
         impl_(quantiles_,
@@ -48,7 +48,7 @@ class summary_t : public static_metric {
 
   summary_t(std::string name, std::string help, std::vector<double> quantiles,
             std::map<std::string, std::string> static_labels,
-            std::chrono::seconds max_age = std::chrono::seconds{60})
+            std::chrono::seconds max_age = std::chrono::seconds{36000})
       : static_metric(MetricType::Summary, std::move(name), std::move(help),
                       std::move(static_labels)),
         quantiles_(std::move(quantiles)),
@@ -146,7 +146,7 @@ class basic_dynamic_summary
   basic_dynamic_summary(
       std::string name, std::string help, std::vector<double> quantiles,
       std::array<std::string, N> labels_name,
-      std::chrono::milliseconds max_age = std::chrono::seconds{60})
+      std::chrono::milliseconds max_age = std::chrono::seconds{36000})
       : Base(MetricType::Summary, std::move(name), std::move(help),
              std::move(labels_name)),
         quantiles_(std::move(quantiles)),
diff --git a/tests/test_metric.cpp b/tests/test_metric.cpp
index 15552c9c..004eac61 100644
--- a/tests/test_metric.cpp
+++ b/tests/test_metric.cpp
@@ -1971,14 +1971,32 @@ TEST_CASE("test metric manager clean expired label") {
   auto& inst = dynamic_metric_manager<test_tag>::instance();
   auto pair = inst.create_metric_dynamic<dynamic_counter_1t>(
       std::string("some_counter"), "", std::array<std::string, 1>{"url"});
+  auto summary = std::make_shared<basic_dynamic_summary<2>>(
+      std::string("test_summary"), std::string("summary help"),
+      std::vector<double>{0.5, 0.9, 0.95, 0.99},
+      std::array<std::string, 2>{"method", "url"});
+  auto h = std::make_shared<dynamic_histogram_t>(
+      std::string("test"), std::string("help"),
+      std::vector<double>{5.23, 10.54, 20.0, 50.0, 100.0},
+      std::array<std::string, 2>{"method", "url"});
+  inst.register_metric(summary);
+  inst.register_metric(h);
   auto c = pair.second;
   c->inc({"/"});
   c->inc({"/test"});
+  summary->observe({"GET", "test"}, 10);
+  h->observe({"GET", "test"}, 10);
   CHECK(c->label_value_count() == 2);
+  CHECK(summary->label_value_count() == 1);
+  CHECK(h->label_value_count() == 1);
   std::this_thread::sleep_for(std::chrono::seconds(2));
   c->inc({"/index"});
   size_t count = c->label_value_count();
   CHECK(count == 1);
+  auto ct1 = summary->label_value_count();
+  CHECK(ct1 == 0);
+  auto ct2 = h->label_value_count();
+  CHECK(ct2 == 0);
 }
 
 TEST_CASE("test remove label value") {