diff --git a/apps/smartdoc/conf.py b/apps/smartdoc/conf.py
index 054c5d832..8d2248bca 100644
--- a/apps/smartdoc/conf.py
+++ b/apps/smartdoc/conf.py
@@ -111,7 +111,7 @@ class Config(dict):
             "ENGINE": self.get('DB_ENGINE'),
             "POOL_OPTIONS": {
                 "POOL_SIZE": 20,
-                "MAX_OVERFLOW": 80
+                "MAX_OVERFLOW": self.get('DB_MAX_OVERFLOW')
             }
         }
 
diff --git a/installer/Dockerfile b/installer/Dockerfile
index 33b5349ce..bd460bf8a 100644
--- a/installer/Dockerfile
+++ b/installer/Dockerfile
@@ -40,6 +40,7 @@ ENV MAXKB_VERSION="${DOCKER_IMAGE_TAG} (build at ${BUILD_AT}, commit: ${GITHUB_C
     MAXKB_DB_PORT=5432  \
     MAXKB_DB_USER=root \
     MAXKB_DB_PASSWORD=Password123@postgres \
+    MAXKB_DB_MAX_OVERFLOW=80 \
     MAXKB_EMBEDDING_MODEL_NAME=/opt/maxkb/model/embedding/shibing624_text2vec-base-chinese \
     MAXKB_EMBEDDING_MODEL_PATH=/opt/maxkb/model/embedding \
     MAXKB_SANDBOX=1 \
@@ -47,6 +48,7 @@ ENV MAXKB_VERSION="${DOCKER_IMAGE_TAG} (build at ${BUILD_AT}, commit: ${GITHUB_C
     PATH=/opt/py3/bin:$PATH \
     POSTGRES_USER=root \
     POSTGRES_PASSWORD=Password123@postgres \
+    POSTGRES_MAX_CONNECTIONS=1000 \
     PIP_TARGET=/opt/maxkb/app/sandbox/python-packages \
     PYTHONPATH=/opt/maxkb/app/sandbox/python-packages \
     PYTHONUNBUFFERED=1
diff --git a/installer/run-maxkb.sh b/installer/run-maxkb.sh
index 43374dfb6..238875e06 100644
--- a/installer/run-maxkb.sh
+++ b/installer/run-maxkb.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 rm -f /opt/maxkb/app/tmp/*.pid
 # Start postgresql
-docker-entrypoint.sh postgres &
+docker-entrypoint.sh postgres -c max_connections=${POSTGRES_MAX_CONNECTIONS} &
 sleep 10
 # Wait postgresql
 until pg_isready --host=127.0.0.1; do sleep 1 && echo "waiting for postgres"; done