memcached - Memcache 最大键过期时间

Question

memcached 的最大 key 过期时间是多少？

如果我不提供过期时间并且缓存已满，会发生什么？

Answer 1

您可以通过提供 Unix 时间戳而不是天数来将 key 过期设置为某个日期。该日期可以是 future 30 天以上的日期:

Expiration times are specified in unsigned integer seconds. They can be set from 0, meaning "never expire", to 30 days (60*60*24*30). Any time higher than 30 days is interpreted as a unix timestamp date. If you want to expire an object on january 1st of next year, this is how you do that.

https://github.com/memcached/memcached/wiki/Programming#expiration

但是，as you say ，如果您将 key 过期时间设置为一定时间而不是日期，则最大值为 2,592,000 秒，即 30 天。