diff --git a/cpp/src/CMakeLists.txt b/cpp/src/CMakeLists.txt
index 2c1219b506..5669bd3f2d 100644
--- a/cpp/src/CMakeLists.txt
+++ b/cpp/src/CMakeLists.txt
@@ -34,7 +34,11 @@ set(service_files
         thrift/gen-cpp/MegasearchService.cpp
         thrift/gen-cpp/megasearch_constants.cpp
         thrift/gen-cpp/megasearch_types.cpp
-        metrics/SystemInfo.cpp metrics/SystemInfo.h server/MegasearchThreadPoolServer.cpp server/MegasearchThreadPoolServer.h)
+        metrics/SystemInfo.cpp
+        metrics/SystemInfo.h
+        server/MegasearchThreadPoolServer.cpp
+        server/MegasearchThreadPoolServer.h
+        )
 
 set(vecwise_engine_files
         ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp
diff --git a/cpp/src/db/FaissExecutionEngine.cpp b/cpp/src/db/FaissExecutionEngine.cpp
index c676ac74b2..65bdeead1f 100644
--- a/cpp/src/db/FaissExecutionEngine.cpp
+++ b/cpp/src/db/FaissExecutionEngine.cpp
@@ -135,7 +135,7 @@ Status FaissExecutionEngine::Search(long n,
     pIndex_->search(n, data, k, distances, labels);
     auto end_time = METRICS_NOW_TIME;
     auto total_time = METRICS_MICROSECONDS(start_time,end_time);
-    server::Metrics::GetInstance().QueryIndexTypePerSecondSet(IndexTrait::BuildIndexType, double(n)/double(total_time));
+    server::Metrics::GetInstance().QueryIndexTypePerSecondSet(build_index_type_, double(n)/double(total_time));
     return Status::OK();
 }
 
diff --git a/cpp/src/db/MemManager.cpp b/cpp/src/db/MemManager.cpp
index a7d639d655..9bae4c9f21 100644
--- a/cpp/src/db/MemManager.cpp
+++ b/cpp/src/db/MemManager.cpp
@@ -34,7 +34,7 @@ void MemVectors::Add(size_t n_, const float* vectors_, IDNumbers& vector_ids_) {
     pEE_->AddWithIds(n_, vectors_, vector_ids_.data());
     auto end_time = METRICS_NOW_TIME;
     auto total_time = METRICS_MICROSECONDS(start_time, end_time);
-    server::Metrics::GetInstance().AddVectorsPerSecondGaugeSet(static_cast<int>(n_), static_cast<int>(schema_.dimension), total_time);
+    server::Metrics::GetInstance().AddVectorsPerSecondGaugeSet(static_cast<int>(n_), static_cast<int>(schema_.dimension_), total_time);
 }
 
 size_t MemVectors::Total() const {
diff --git a/cpp/src/server/MegasearchThreadPoolServer.cpp b/cpp/src/server/MegasearchThreadPoolServer.cpp
index 4f3a92e021..f7ce0d4f72 100644
--- a/cpp/src/server/MegasearchThreadPoolServer.cpp
+++ b/cpp/src/server/MegasearchThreadPoolServer.cpp
@@ -17,3 +17,11 @@ void zilliz::vecwise::server::MegasearchThreadPoolServer::onClientDisconnected(a
     server::Metrics::GetInstance().ConnectionGaugeDecrement();
     TThreadPoolServer::onClientDisconnected(pClient);
 }
+zilliz::vecwise::server::MegasearchThreadPoolServer::MegasearchThreadPoolServer(const std::shared_ptr<apache::thrift::TProcessor> &processor,
+                                                                                const std::shared_ptr<apache::thrift::transport::TServerTransport> &serverTransport,
+                                                                                const std::shared_ptr<apache::thrift::transport::TTransportFactory> &transportFactory,
+                                                                                const std::shared_ptr<apache::thrift::protocol::TProtocolFactory> &protocolFactory,
+                                                                                const std::shared_ptr<apache::thrift::concurrency::ThreadManager> &threadManager)
+    : TThreadPoolServer(processor, serverTransport, transportFactory, protocolFactory, threadManager) {
+
+}
diff --git a/cpp/src/server/MegasearchThreadPoolServer.h b/cpp/src/server/MegasearchThreadPoolServer.h
index 03eb3b608a..309c17ef3f 100644
--- a/cpp/src/server/MegasearchThreadPoolServer.h
+++ b/cpp/src/server/MegasearchThreadPoolServer.h
@@ -22,6 +22,7 @@ class MegasearchThreadPoolServer : public apache::thrift::server::TThreadPoolSer
         const std::shared_ptr<apache::thrift::protocol::TProtocolFactory>& protocolFactory,
         const std::shared_ptr<apache::thrift::concurrency::ThreadManager>& threadManager
         = apache::thrift::concurrency::ThreadManager::newSimpleThreadManager());
+
  protected:
     void onClientConnected(const std::shared_ptr<apache::thrift::server::TConnectedClient>& pClient) override ;
     void onClientDisconnected(apache::thrift::server::TConnectedClient* pClient) override ;