diff --git a/cpp/src/scheduler/SchedInst.cpp b/cpp/src/scheduler/SchedInst.cpp
index 67c12b8b1d..f775979e6b 100644
--- a/cpp/src/scheduler/SchedInst.cpp
+++ b/cpp/src/scheduler/SchedInst.cpp
@@ -42,6 +42,9 @@ StartSchedulerService() {
             auto pinned_memory = resconf.GetInt64Value(server::CONFIG_RESOURCE_PIN_MEMORY);
             auto temp_memory = resconf.GetInt64Value(server::CONFIG_RESOURCE_TEMP_MEMORY);
             auto resource_num = resconf.GetInt64Value(server::CONFIG_RESOURCE_NUM);
+            if (pinned_memory == 0) pinned_memory = 300;
+            if (temp_memory == 0) temp_memory = 300;
+            if (resource_num == 0) resource_num = 2;
             pinned_memory = 1024 * 1024 * pinned_memory;
             temp_memory = 1024 * 1024 * temp_memory;
             knowhere::FaissGpuResourceMgr::GetInstance().InitDevice(device_id, pinned_memory, temp_memory, resource_num);