diff --git a/core/src/db/meta/MetaTypes.h b/core/src/db/meta/MetaTypes.h
index d8df8c2622..611df80d98 100644
--- a/core/src/db/meta/MetaTypes.h
+++ b/core/src/db/meta/MetaTypes.h
@@ -54,7 +54,7 @@ struct TableSchema {
     int64_t flag_ = 0;
     int64_t index_file_size_ = DEFAULT_INDEX_FILE_SIZE;
     int32_t engine_type_ = DEFAULT_ENGINE_TYPE;
-    std::string index_params_ = "{ \"nlist\": 16384 }";
+    std::string index_params_ = "{}";
     int32_t metric_type_ = DEFAULT_METRIC_TYPE;
     std::string owner_table_;
     std::string partition_tag_;