Limit the number of threads used for low zoom renders

[chef.git] / cookbooks / imagery / templates / default / nginx_imagery_layer_fragment.conf.erb

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 5ef9a15f99f165a85d51e896f2ae71687fa9fc35..f286292371430744be7fc90603dc78be57dda856 100644 (file)
--- a/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb
+++ b/cookbooks/imagery/templates/default/nginx_imagery_layer_fragment.conf.erb
@@ -1,33 +1,43 @@
 # DO NOT EDIT - This file is being maintained by Chef
-
 location ~* "^/layer/<%= @layer %>/(\d+)/(\d+)/(\d+)\.(png|jpg|jpeg)$" {
   # Override QUERY_STRING to force mapserver query parameters
   fastcgi_param QUERY_STRING "map=/srv/imagery/mapserver/layer-<%= @layer %>.map&mode=tile&layers=<%= @layer %>&tilemode=gmap&tile=$2+$3+$1";
-  fastcgi_pass "unix:/var/run/mapserver-fastcgi/layer-<%= @site %>.socket";
-  fastcgi_buffers 8 64k;
+  fastcgi_pass "<%= @site %>_fastcgi";
   include fastcgi_params;
   fastcgi_param REQUEST_METHOD "GET";
   fastcgi_param HTTP_PROXY "";
-  fastcgi_read_timeout 300s;
+  fastcgi_read_timeout 60s;
 
   # Caching
   fastcgi_cache "fastcgi_cache_zone";
   fastcgi_cache_key "<%= @layer %><%= @revision %> $request_method $1 $2 $3";
-  fastcgi_keep_conn on;
-  fastcgi_cache_lock on;
-  fastcgi_cache_lock_timeout 60s;
+
+  # 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;
 
-  fastcgi_ignore_client_abort on;
+  keepalive_requests 0;
 
   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
   gzip off;
 
   # Add HTTP Cache-Control + Expires Headers
   expires 7d;
+  add_header Cache-Control "stale-while-revalidate=604800, stale-if-error=604800";
+  add_header x-cache-status $upstream_cache_status;
 
   # Allow CORS requests
   add_header 'Access-Control-Allow-Origin' '*';