update model_worker.py

model_worker.py

@@ -541,4 +541,4 @@ if __name__ == "__main__":
         args.load_8bit,
         args.device,
     )
-    uvicorn.run(app, host=args.host, port=args.port, log_level="info")
+    uvicorn.run(app, host=args.host, port=args.port, log_level="info", workers=1)