Postgresql 乘客队列中总是有请求

我有一个ngnix和passanger和ruby配置， （nginx/1.15.8 Phusion_乘客/6.0.2 Ruby 5.0）

当有一点请求时，我的应用程序看起来很慢或者根本没有加载，并且 队列中的请求：77或有时250+并且像这样被卡住

我也可以在postgresSQL中看到一些查询被卡住了，但我不确定它是否相关

当我停止上传/浏览网站时。应用程序似乎恢复正常

ruby应用程序上的Passenger配置

    # The following deploys your Ruby/Python/Node.js/Meteor app on Passenger.

    # Not familiar with Passenger, and used (G)Unicorn/Thin/Puma/pure Node before?
    # Yes, this is all you need to deploy on Passenger! All the reverse proxying,
    # socket setup, process management, etc are all taken care automatically for
    # you! Learn more at https://www.phusionpassenger.com/.
    passenger_enabled on;
    passenger_user app;

    # For Ruby 2.6
    passenger_ruby /usr/bin/ruby2.6;

    #File upload size:
    client_max_body_size  5G;