imagery: nginx tweak for async stale background update

diff --git a/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb b/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb
index 9b837864ba5eaf9f326152f8f35825b2eae52f07..372bf0e561a21413107c584904a33a0c48aa2423 100644 (file)
--- a/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb
+++ b/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb
@@ -17,7 +17,6 @@ location ~* "^/layer/<%= @layer %>/(\d+)/(\d+)/(\d+)\.(png|jpg|jpeg)$" {
   # Free connection to socket for other requests
   fastcgi_keep_conn off;
 
-  fastcgi_cache_lock on;
   fastcgi_cache_valid 200 21d;
 
   # Serve stale cache on errors or if updating
@@ -27,6 +26,8 @@ location ~* "^/layer/<%= @layer %>/(\d+)/(\d+)/(\d+)\.(png|jpg|jpeg)$" {
   # Enable revalidation using If-Modified-Since and If-None-Match for stale items
   fastcgi_cache_revalidate on;
 
+  keepalive_requests 0;
+
   # Ignore client abort as it causes issues with the pipeline
   fastcgi_ignore_client_abort on;