How to understand the save parameter in redis

Question

Specify how many update operations there are within a long period of time, and then synchronize the data to the data file. Multiple conditions can be used

save <seconds> <changes>

Redis默认配置文件中提供了三个条件：

save 900 1

save 300 10

save 60 10000

分别表示900秒（15分钟）内有1个更改，300秒（5分钟）内有10个更改以及60秒内有10000个更改。

怎么理解 ？

Answer 1

If any condition is triggered, the data in the memory will be synchronized to the disk.