HOS-92: added max-request support to gunicorn (#4217)

Co-authored-by: simon <simon@reflex.dev>

reflex/config.py

@@ -418,6 +418,12 @@ class Config(Base):
     # Number of gunicorn workers from user
     gunicorn_workers: Optional[int] = None
 
+    # Number of requests before a worker is restarted
+    gunicorn_max_requests: int = 100
+
+    # Variance limit for max requests; gunicorn only
+    gunicorn_max_requests_jitter: int = 25
+
     # Indicate which type of state manager to use
     state_manager_mode: constants.StateManagerMode = constants.StateManagerMode.DISK
 

reflex/utils/exec.py

@@ -337,8 +337,8 @@ def run_uvicorn_backend_prod(host, port, loglevel):
 
     app_module = get_app_module()
 
-    RUN_BACKEND_PROD = f"gunicorn --worker-class {config.gunicorn_worker_class} --preload --timeout {config.timeout} --log-level critical".split()
-    RUN_BACKEND_PROD_WINDOWS = f"uvicorn --timeout-keep-alive {config.timeout}".split()
+    RUN_BACKEND_PROD = f"gunicorn --worker-class {config.gunicorn_worker_class} --max-requests {config.gunicorn_max_requests} --max-requests-jitter {config.gunicorn_max_requests_jitter} --preload --timeout {config.timeout} --log-level critical".split()
+    RUN_BACKEND_PROD_WINDOWS = f"uvicorn --limit-max-requests {config.gunicorn_max_requests} --timeout-keep-alive {config.timeout}".split()
     command = (
         [
             *RUN_BACKEND_PROD_WINDOWS,