What will happen if we use big strings as MySQL index key

Keep primary key / index key as tiny as possible

Is 20M of rows still a valid soft limit of MySQL table in 2023?

Innodb_buffer_pool size / table size decides whether there'll be a performance downgrade.

The splinters and the blood were still there, and it was a festival. 碎片和血迹依旧在那里，今天是一个节日。

AWS通过扩大rtt和retry实现限速

We told stories in such a night that all those stories seemed to never end. 我们在这样的夜晚中讲故事，那些故事都仿佛不会终止

Don't hardcode buffer size. Don't keep CPU usage so high.

Patterns of network issues

You stopped talking any more in my dream. I knew it was me who was forgetting. 梦中的你不再说话，我知道是我在忘记

Spot instance can save a lot of cost if it fits your use case.

Again, avoid redis big keys