diff --git a/src/java_binding/run_demo.sh b/src/java_binding/run_demo.sh
index 67cd474050eaf..f82acd3caba78 100644
--- a/src/java_binding/run_demo.sh
+++ b/src/java_binding/run_demo.sh
@@ -19,7 +19,7 @@ set -x
 
 cd ${RISINGWAVE_ROOT}/java
 
-java -cp "./java-binding-integration-test/target/dependency/*:./java-binding-integration-test/target/classes" \
+java -Xmx12288m -cp "./java-binding-integration-test/target/dependency/*:./java-binding-integration-test/target/classes" \
     com.risingwave.java.binding.HummockReadDemo
 
 psql -d dev -h localhost -p 4566 -U root << EOF