How to limit max key size in redis?

@jasen 

To limit the maximum key size in Redis, you can use the maxmemory and maxmemory-policy configuration options. These options allow you to set a maximum memory limit for your Redis instance and define how Redis should behave when this limit is reached.

Here is how you can limit the maximum key size in Redis:

1. Set the maximum memory limit using the maxmemory configuration option in your redis.conf file or by using the CONFIG SET maxmemory command in the Redis CLI. For example, to set a memory limit of 1GB, you can use the following command:

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CONFIG SET maxmemory 1GB

1. Define the eviction policy using the maxmemory-policy configuration option. This option allows you to specify how Redis should handle keys when the memory limit is reached. Some of the commonly used eviction policies are volatile-lru, allkeys-lru, volatile-random, allkeys-random, volatile-ttl, and noeviction.

For example, to use the volatile-lru eviction policy, you can use the following command:

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CONFIG SET maxmemory-policy volatile-lru

1. Restart your Redis instance for the changes to take effect.

By setting a memory limit and defining an eviction policy, you can limit the maximum key size in Redis and ensure that your Redis instance does not consume more memory than allowed.