diff --git a/.env b/.env
new file mode 100644
index 000000000..17f7ebb68
--- /dev/null
+++ b/.env
@@ -0,0 +1,3 @@
+USER=root
+PASSWORD=openIM
+DATA_DIR=./
\ No newline at end of file
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 6cf32b5a1..3e932ee60 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -81,6 +81,7 @@ services:
       KAFKA_LISTENERS: INSIDE://:9092,OUTSIDE://:9093
       KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: "INSIDE:PLAINTEXT,OUTSIDE:PLAINTEXT"
       KAFKA_INTER_BROKER_LISTENER_NAME: INSIDE
+      KAFKA_HEAP_OPTS: "-Xmx512M -Xms256M"
     depends_on:
       - zookeeper