perf(uwsgi): set lazy-app = false so the master preforks the app (MAPCO-11223)

helm/config/mapProxyUwsgi.ini

@@ -13,7 +13,10 @@ processes = {{ .Values.mapproxy.uwsgi.processes }} ; Maximum number of workers a
 threads = {{ .Values.mapproxy.uwsgi.threads }}
 enable-threads = true
 master = true
-lazy-app = true                      ; Fork workers after app load (required for OTel) todo check this variable effect
+; Load the app once in the master, then fork. Workers share the parsed mapproxy.yaml
+; copy-on-write. app.py builds the OTel providers in a postfork hook so their export
+; threads and gRPC channels are still created per worker — see src/app.py.
+; lazy-app = false
 py-callos-afterfork = true           ; allow workers to trap signals
 ; cheaper = 2                          ; Minimum number of workers allowed
 disable-logging = {{ .Values.mapproxy.uwsgi.disableLogging }}

readme.md

@@ -370,7 +370,7 @@ The container starts uWSGI with the following fixed flags (not configurable at r
 | `--socket 0.0.0.0:3031`      | uwsgi binary protocol — use as nginx upstream                          |
 | `--http-socket 0.0.0.0:8080` | plain HTTP — use for liveness probes and direct access                 |
 | `--master`                   | master process manages workers                                         |
-| `--lazy-app`                 | workers load `app.py` **after** fork — telemetry initialises per worker via the dispatch in `app.py` |
+| `lazy-app = false`           | master loads `app.py` once, then forks — workers share the parsed config copy-on-write |
 | `--harakiri 120`             | kill workers that take > 120 s                                         |
 | `--max-requests 1000`        | recycle worker after 1000 requests                                     |
 | `--reload-on-rss 2048`       | recycle worker if RSS exceeds 2 GB                                     |