+ fastcgi_param REQUEST_METHOD "GET";
+ fastcgi_param HTTP_PROXY "";
+ fastcgi_read_timeout 60s;
+
+ # Caching
+ fastcgi_cache "fastcgi_cache_zone";
+ fastcgi_cache_key "<%= @layer %><%= @revision %> $request_method $1 $2 $3";
+
+ # Free connection to socket for other requests
+ fastcgi_keep_conn off;
+
+ fastcgi_cache_valid 200 21d;
+
+ # Serve stale cache on errors or if updating
+ fastcgi_cache_use_stale error timeout updating http_500 http_503;
+ # If in cache as stale, serve stale and update in background
+ fastcgi_cache_background_update on;
+ # 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;
+
+ fastcgi_catch_stderr "Image handling error";
+
+ fastcgi_next_upstream error timeout invalid_header http_500 http_503;
+ fastcgi_next_upstream_tries 8;
+
+ # Do not GZIP tiles