diff --git a/cpp/src/cache/Cache.inl b/cpp/src/cache/Cache.inl
index be01c11c77e9f8ac7d445663539eb2e57e92f877..5ca1028318cfbdb16b73bae88f82f878f140d695 100644
--- a/cpp/src/cache/Cache.inl
+++ b/cpp/src/cache/Cache.inl
@@ -56,11 +56,11 @@ void Cache<ItemObj>::insert(const std::string& key, const ItemObj& item) {
         return;
     }
 
-    if(item->size() > capacity_) {
-        SERVER_LOG_ERROR << "Item size " << item->size()
-                        << " is too large to insert into cache, capacity " << capacity_;
-        return;
-    }
+//    if(item->size() > capacity_) {
+//        SERVER_LOG_ERROR << "Item size " << item->size()
+//                        << " is too large to insert into cache, capacity " << capacity_;
+//        return;
+//    }
 
     //calculate usage
     {
diff --git a/cpp/unittest/server/cache_test.cpp b/cpp/unittest/server/cache_test.cpp
index 8599098b5511dde3d002f2d478a716c25fc72407..8293805209199c783f65c65f9c525b253fd1edca 100644
--- a/cpp/unittest/server/cache_test.cpp
+++ b/cpp/unittest/server/cache_test.cpp
@@ -162,7 +162,7 @@ TEST(CacheTest, CPU_CACHE_TEST) {
         engine::VecIndexPtr mock_index = std::make_shared<MockVecIndex>(256, 6000000);
         cache::DataObjPtr data_obj = std::make_shared<cache::DataObj>(mock_index);
         cpu_mgr->InsertItem("index_6g", data_obj);
-        ASSERT_FALSE(cpu_mgr->ItemExists("index_6g"));//data greater than capacity can not be inserted sucessfully
+        ASSERT_TRUE(cpu_mgr->ItemExists("index_6g"));
     }
 
     cpu_mgr->PrintInfo();