应该从 Nginx 配置中删除 `keepalive_timeout` 吗？

Question

哪个是更好的配置/优化：明确限制keepalive_timeout或允许 Nginx 自行终止保活连接？

我看到了关于keepalive_timeoutNginx 指令的两个相互矛盾的建议。它们如下：

# How long to allow each connection to stay idle; longer values are better
# for each individual client, particularly for SSL, but means that worker
# connections are tied up longer. (Default: 65)
keepalive_timeout  20;

和

# You should remove keepalive_timeout from your formula.
# Nginx closes keepalive connections when the
# worker_connections limit is reached.

该Nginx的 文档为keepalive_timeout没有提及自动查杀，而我只看到这一建议一次，但它令我着迷。

该服务器专门为TLS 安全连接提供服务，所有未加密的连接都会立即重新路由到https://相同 URL的版本。

Answer 1

当达到 worker_connections 限制时，Nginx 关闭 keepalive 连接。

确实如此。

• src/core/ngx_connection.c:l843 -ngx_drain_connections();
• src/http/ngx_http_request.c:l3042 -ngx_reusable_connection(c, 1);