modules/server/nginx: log upstream response time

This will be useful to see which cgit requests take the longest, in
case any features are taking up an unreasonable amount of CPU time and
should be disabled.

1 files changed, 2 insertions, 1 deletions

diff --git a/modules/server/nginx/default.nix b/modules/server/nginx/default.nix
index 4fb08aa7ef52..d60b1aa30c56 100644
--- a/modules/server/nginx/default.nix
+++ b/modules/server/nginx/default.nix
@@ -11,7 +11,8 @@
 
   services.nginx.commonHttpConfig = ''
     log_format privacy '[$time_local] $request_method '
-                       '$scheme://$host$request_uri $status $body_bytes_sent';
+                       '$scheme://$host$request_uri $status $body_bytes_sent '
+                       '($upstream_response_time seconds)';
 
     # systemd catches syslog, and access_log doesn't support stdout/stderr.
     access_log syslog:server=unix:/dev/log privacy;