diff --git a/java/examples/src/main/java/PaddleServingClientExample.java b/java/examples/src/main/java/PaddleServingClientExample.java
index ceab6fa789fa3f622c23efb478ca49b3833bde77..cdc11df130095d668734ae0a23adb12ef735b2ea 100644
--- a/java/examples/src/main/java/PaddleServingClientExample.java
+++ b/java/examples/src/main/java/PaddleServingClientExample.java
@@ -85,7 +85,7 @@ public class PaddleServingClientExample {
             System.out.println("connect failed.");
             return false;
         }
-        succ = client.setRpcTimeoutMs(10000); // cpu
+        succ = client.setRpcTimeoutMs(20000); // cpu
         if (succ != true) {
             System.out.println("set timeout failed.");
             return false;
diff --git a/tools/serving_build.sh b/tools/serving_build.sh
index fff272f2acba9ff5aa1a64a98341251d30012708..ec26095a9439fe8d1b466e79695a9d9f26b7c46c 100644
--- a/tools/serving_build.sh
+++ b/tools/serving_build.sh
@@ -539,7 +539,7 @@ function java_run_test() {
             cd ../../python/examples/grpc_impl_example/yolov4 # pwd: /Serving/python/examples/grpc_impl_example/yolov4
             python -m paddle_serving_app.package --get_model yolov4
             tar -xzvf yolov4.tar.gz
-            check_cmd "python -m paddle_serving_server.serve --model yolov4_model --port 9393 --use_multilang > /dev/null &"
+            check_cmd "python -m paddle_serving_server.serve --model yolov4_model --port 9393 --use_multilang --mem_optim > /dev/null &"
             cd ../../../java/examples # /Serving/java/examples
             java -cp target/paddle-serving-sdk-java-examples-0.0.1-jar-with-dependencies.jar PaddleServingClientExample yolov4 src/main/resources/000000570688.jpg
             kill_server_process