diff --git a/cpp/unittest/db/db_tests.cpp b/cpp/unittest/db/db_tests.cpp
index d505320e86..bd17081af8 100644
--- a/cpp/unittest/db/db_tests.cpp
+++ b/cpp/unittest/db/db_tests.cpp
@@ -21,7 +21,7 @@ namespace {
     static const std::string TABLE_NAME = "test_group";
     static constexpr int64_t TABLE_DIM = 256;
     static constexpr int64_t VECTOR_COUNT = 250000;
-    static constexpr int64_t INSERT_LOOP = 100000;
+    static constexpr int64_t INSERT_LOOP = 10000;
 
     engine::meta::TableSchema BuildTableSchema() {
         engine::meta::TableSchema table_info;
diff --git a/cpp/unittest/db/mysql_db_test.cpp b/cpp/unittest/db/mysql_db_test.cpp
index 907aa8a0c4..7fdb30a204 100644
--- a/cpp/unittest/db/mysql_db_test.cpp
+++ b/cpp/unittest/db/mysql_db_test.cpp
@@ -21,7 +21,7 @@ namespace {
     static const std::string TABLE_NAME = "test_group";
     static constexpr int64_t TABLE_DIM = 256;
     static constexpr int64_t VECTOR_COUNT = 250000;
-    static constexpr int64_t INSERT_LOOP = 100000;
+    static constexpr int64_t INSERT_LOOP = 10000;
 
     engine::meta::TableSchema BuildTableSchema() {
         engine::meta::TableSchema table_info;