Python中gunicorn部署问题如何解决

最近做 python server 的选型， gunicorn+meinheld/gevent 都不错，但在 nginx 下性能、错误率掉得有点厉害，远不如 nginx+uWSGI+gevent 稳定，请教下如何部署？

gunicorn -b :18003 -k egg:meinheld#gunicorn_worker  -w 9 mybottle:app 
#or
gunicorn -b :18003 -k gevent_pywsgi  -w 9    mybottle:app

nginx.conf

    server {
        listen 8003;
        location / {
            proxy_pass http://127.0.0.1:18003;
        }
    }

谢谢！