fix: limit number of blocking threads

Author: nijel

etc/supervisor/conf.d/web.conf

@@ -6,6 +6,7 @@ command = /app/venv/bin/granian
     --interface wsgi
     --runtime-threads 2
     --workers %(ENV_WEB_WORKERS)s
+    --blocking-threads %(ENV_WEB_BLOCKING_THREADS)s
     --host 127.0.0.1
     --port 8081
     %(ENV_GRANIAN_ARGS)s

start

@@ -309,6 +309,7 @@ set_real_ip_from 0.0.0.0/0;
     : "${CELERY_BEAT_OPTIONS:=""}"
     : "${CELERY_SINGLE_OPTIONS:=""}"
     : "${WEB_WORKERS:="$((WEBLATE_WORKERS <= 3 ? 2 : WEBLATE_WORKERS / 2))"}"
+    : "${WEB_BLOCKING_THREADS:="$((WEBLATE_WORKERS * 2))"}"
     : "${GRANIAN_ARGS:=""}"
 
     export CELERY_MAIN_OPTIONS
@@ -319,7 +320,7 @@ set_real_ip_from 0.0.0.0/0;
     export CELERY_BEAT_OPTIONS
     export CELERY_SINGLE_OPTIONS
     export WEB_WORKERS
-    export WEB_RUNTIME_THREADS
+    export WEB_BLOCKING_THREADS
     export GRANIAN_ARGS
 
     #  Execute supervisor