debian: use cheaper uwsgi subsystem (#45454)

debian/uwsgi.ini

@@ -1,18 +1,37 @@
 [uwsgi]
 auto-procname = true
 procname-prefix-spaced = passerelle
+strict = true
 
 plugin = python3
+single-interpreter = true
 module = passerelle.wsgi:application
+need-app = true
 
 http-socket = /run/passerelle/passerelle.sock
 chmod-socket = 666
 vacuum = true
 
 master = true
-processes = 5
-harakiri = 120
 enable-threads = true
+harakiri = 120
+
+processes = 500
+
+plugin = cheaper_busyness
+cheaper-algo = busyness
+cheaper = 5
+cheaper-initial = 10
+cheaper-overload = 5
+cheaper-step = 10
+cheaper-busyness-multiplier = 30
+cheaper-busyness-min = 20
+cheaper-busyness-max = 70
+cheaper-busyness-backlog-alert = 16
+cheaper-busyness-backlog-step = 2
+
+max-requests = 500
+max-worker-lifetime = 7200
 
 buffer-size = 32768