memorystore redis or valkey lower max key size value.

[rbond]

Hi, I was looking for a way to lower the default key value size limit from 512mb to 10mb. 

In redis/valkey it looks like you can set proto-max-bulk-len to control the max size that a key value can have, but it does not look like memory store allows that config option to be set.

Was curious on thoughts about this and if anyone knows a good way to potentially submit this as a feature request? 

Thanks! 

[Joy_S]

Hi @rbond,

Welcome to Google Cloud Community!

To answer your question, Google Cloud Memorystore for Redis does not have a default key-value size limit of 512MB that you can directly modify to 10MB. The 512MB refers to the maximum size for a single string value or element within an aggregate data type (like a hash or list element) in open-source Redis, which Memorystore for Redis generally adheres to.

You may try to manage the overall memory usage of your Redis instance in Memorystore instead. Memorystore instances have a total memory capacity (e.g., 1GB, 10GB, 100GB). You can set a maxmemory-gb or maxmemory-percent configuration to define the threshold at which Redis starts evicting keys to free up memory, based on the configured eviction policy.To manage the memory usage and effectively set a "limit" on how much data your instance holds before eviction, you should adjust the maxmemory-gb or maxmemory-percent configuration.

Was this helpful? If so, please accept this answer as “Solution”. If you need additional assistance, reply here within 2 business days and I’ll be happy to help.

[rbond]

Hi Joy. Thanks for your reply.
Agreed, there currently is not any setting in Memorystore redis, the open source redis project does have a setting to control the size of key value `proto-max-bulk-len`, I tried setting it and it does work as expected in the open source redis project.
Of note aws memoryDB does allow setting this: https://docs.aws.amazon.com/memorydb/latest/devguide/parametergroups.redis.html

What do you think of potential of feature request to enable being able to set `proto-max-bulk-len` setting in Memorystore redis or valkey.
Thanks!