我有一个具有通知功能的项目，我想出了一个关于如何实时获取通知的想法.我的想法是每秒查询一次表.我有一个通知表，所以每当客户端添加一些东西时，它都会插入到通知表中，然后另一个客户端通过查询来获取通知.我使用 ajax 来做到这一点.
I have a project that has notification functionality and I came up with an idea on how to get a notification real time. My idea is to query the table every second. I have a notification table, so whenever the client is adding something it will insert to the notification table and then the other client gets the notification by querying it. I use ajax to do this.
每秒查询一次表是好还是不好的编程习惯?我只在 localhost 中使用它，这很好.当网站上线时，这种想法会产生负面影响吗?
Is it good to query the table every second or it's bad programming practice? I only use this in localhost and it's fine. Do this kind of idea affect negatively when the site goes live?
预先感谢您的回答.
每秒 ping 一次数据库并不是实现此目的的理想方式；您可以实现数据库触发器和 HTML5 websockets/推送通知的组合:http://html5hacks.com/blog/2013/04/21/push-notifications-to-the-browser-with-server-sent-events/
Pinging the DB every second is not the ideal way to do this; you can implement a combination of DB triggers and HTML5 websockets/push notifications: http://html5hacks.com/blog/2013/04/21/push-notifications-to-the-browser-with-server-sent-events/
http://www.abrandao.com/2013/06/25/websockets-using-modern-html5-technology-for-true-server-push/
http://pusher.com/tutorials/html5_realtime_push_notifications
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