Maximum redis key size

[migbash]

I have read that the maximum key size in redis is of 512MB.

• Is there an issue if the max. size is increased to greater than 512MB ?
• Or can it be possible to increase it further for a single key and its values ?

Currently my redis instance with the key of greater than 512MB is working correctly.

[ranshid]

@migbash the maximum size of the key is by default 512MB, but there is a configuration (proto-max-bulk-len) which allows you the change this limit. Given said that using large key size is not recommended in term of memory and CPU efficiency I suggest you take a look at this

[itamarhaber]

As @ranshid said, a single string value is "limited" to 512MB by default, but can be changed.
As a result, a String key name and value obey that limit.
A Hash has a key name, fields, and their values. Each is a string. The Hash can contain up to 2^32-1 field-value pairs.

[migbash]

@itamarhaber In my case, it's a Hash that is now 592 MB - with it's fields/values within.

• Is the Hash also limited to 512 MB in total ?
• Or are the individual strings inside the Hash that are limited to 512 MB ?

[itamarhaber]

Meant to write here: "individual strings inside the Hash that are limited to 512 MB", yes

[itamarhaber]

The latter.