express - Redis monitor 命令每秒显示相同的请求

Question

我刚刚设置了一个带有 Express 服务器的 Redis 客户端，以便我可以将用户 session 数据保存在 Redis 存储中。出于兴趣，我正在监视我在 cli 上的请求。使用 monitor命令查看通过 Express 发出的请求。当用户登录时，我设置了 userId req.session 上的键对象，并且请求显示在 cli 上:

"set" "sess:2w8OkICwucsO9-18z_ghxA1FLH9GcWpx" "{\"cookie\":{\"originalMaxAge\":3600000,\"expires\":\"2020-10-09T12:09:37.604Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"}}" "EX" "3600"

但是在存储 session 信息后， get和 expire命令显示为记录在 cli 上:

1602241780.017805 [0 127.0.0.1:61201] "get" "sess:2w8OkICwucsO9-18z_ghxA1FLH9GcWpx"
1602241780.026601 [0 127.0.0.1:61201] "expire" "sess:2w8OkICwucsO9-18z_ghxA1FLH9GcWpx" "3600"
1602241783.014473 [0 127.0.0.1:61201] "get" "sess:2w8OkICwucsO9-18z_ghxA1FLH9GcWpx"
1602241783.020260 [0 127.0.0.1:61201] "expire" "sess:2w8OkICwucsO9-18z_ghxA1FLH9GcWpx" "3600"
1602241786.018502 [0 127.0.0.1:61201] "get" "sess:2w8OkICwucsO9-18z_ghxA1FLH9GcWpx"
1602241786.024512 [0 127.0.0.1:61201] "expire" "sess:2w8OkICwucsO9-18z_ghxA1FLH9GcWpx" "3600"
1602241789.018028 [0 127.0.0.1:61201] "get" "sess:2w8OkICwucsO9-18z_ghxA1FLH9GcWpx"
1602241789.023479 [0 127.0.0.1:61201] "expire" "sess:2w8OkICwucsO9-18z_ghxA1FLH9GcWpx" "3600"

这种情况每秒都在继续..
我很确定我不会经常通过 Express 调用任何函数，那么为什么 monitor命令显示这些请求？

Answer 1

问题是 GraphQL Playground 每 2 秒执行一次自省(introspection)查询。我禁用了设置选项卡中的设置，它起作用了!