diff --git a/plugins/openresty/conf/nginx.conf b/plugins/openresty/conf/nginx.conf
index 9533df6c7..b97f54e90 100644
--- a/plugins/openresty/conf/nginx.conf
+++ b/plugins/openresty/conf/nginx.conf
@@ -62,9 +62,10 @@ http
 
     # CACEH_BEGIN
     proxy_buffering on;
-    proxy_buffer_size 4k;
-    proxy_buffers 512 4k;
-    proxy_busy_buffers_size 64k;
+    proxy_buffer_size 1024k;
+    proxy_buffers 16 1024k;
+    proxy_busy_buffers_size 2048k;
+    proxy_temp_file_write_size 2048k;
     proxy_cache_path {$SERVER_PATH}/openresty/nginx/proxy_cache_temp levels=1:2 keys_zone=mw_cache:512m inactive=5m max_size=2g use_temp_path=off;
     #proxy timeout
     proxy_connect_timeout 3s;