how to limit number of entries in a db of redis

I am running a redis instance and want to limit the number of keys in an DB of the instance. I checke the documentation and I 开发者_StackOverflow社区saw that we can limit the memory of a complete instance .Any way to do that on DB level?

Thanks in Advance.

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No, Redis does not have a function that can limit the amount of keys in the database.

The closest thing I can think of is checking the key number in your script, and the preventing the query of there is too many keys in the databse