diff --git a/cpp/dbpool.cc b/cpp/dbpool.cc
index f6d460e..1c9690e 100644
--- a/cpp/dbpool.cc
+++ b/cpp/dbpool.cc
@@ -127,7 +127,6 @@ namespace f8
             }
 
             if (last_conn_) {
-                printf("FreeConn\n");
                 delete last_conn_;
                 last_conn_ = nullptr;
             }
@@ -199,7 +198,6 @@ namespace f8
                 delete last_conn_;
                 last_conn_ = nullptr;
             }
-            printf("CreateConn\n");
             last_conn_ = new a8::mysql::Connection();
             last_query_ = last_conn_->CreateQuery();
             if (last_conn_->Connect(