diff --git a/config/templates/env.template b/config/templates/env.template
index b4f9c868d..7a095b2bb 100644
--- a/config/templates/env.template
+++ b/config/templates/env.template
@@ -118,6 +118,7 @@ MONGO_OPENIM_PASSWORD=openIM123
 # Default: MONGO_DATABASE=openim_v3
 MONGO_DATABASE=openim_v3
 
+MONGO_MAX_POOL_SIZE=100
 # ----- Redis Configuration -----
 
 # Port on which Redis in-memory data structure store is running.
diff --git a/deployments/templates/env-template.yaml b/deployments/templates/env-template.yaml
index 1044dd6bc..85619b422 100644
--- a/deployments/templates/env-template.yaml
+++ b/deployments/templates/env-template.yaml
@@ -118,6 +118,7 @@ MONGO_OPENIM_PASSWORD=${MONGO_OPENIM_PASSWORD}
 # Default: MONGO_DATABASE=openim_v3
 MONGO_DATABASE=${MONGO_DATABASE}
 
+MONGO_MAX_POOL_SIZE=${MONGO_MAX_POOL_SIZE}
 # ----- Redis Configuration -----
 
 # Port on which Redis in-memory data structure store is running.
diff --git a/scripts/start-all.sh b/scripts/start-all.sh
index aac4b1837..952995032 100755
--- a/scripts/start-all.sh
+++ b/scripts/start-all.sh
@@ -63,7 +63,7 @@ function execute_start_scripts() {
 
 
 if openim::util::is_running_in_container; then
-  exec > ${DOCKER_LOG_FILE} 2>&1
+  exec >> ${DOCKER_LOG_FILE} 2>&1
 fi
 
 
diff --git a/tools/component/component.go b/tools/component/component.go
index 77998166c..71e1d9eb2 100644
--- a/tools/component/component.go
+++ b/tools/component/component.go
@@ -299,9 +299,9 @@ func configGetEnv(config *config.GlobalConfig) error {
 	config.Mongo.Password = getEnv("MONGO_OPENIM_PASSWORD", config.Mongo.Password)
 	config.Mongo.Address = getArrEnv("MONGO_ADDRESS", "MONGO_PORT", config.Mongo.Address)
 	config.Mongo.Database = getEnv("MONGO_DATABASE", config.Mongo.Database)
-	maxPoolSize, err := getEnvInt("MONGO_DATABASE", config.Mongo.MaxPoolSize)
+	maxPoolSize, err := getEnvInt("MONGO_MAX_POOL_SIZE", config.Mongo.MaxPoolSize)
 	if err != nil {
-		return err
+		return errs.Wrap(err, "MONGO_MAX_POOL_SIZE")
 	}
 	config.Mongo.MaxPoolSize = maxPoolSize