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Docs: Document caching defaults in enterprise config (#36181)

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* Docs: Document caching defaults in enterprise config

Signed-off-by: Dave Henderson <dave.henderson@grafana.com>

* adding missed period

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

* more missed periods!

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>
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docs/sources/enterprise/enterprise-configuration.md
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@ -341,6 +341,8 @@ When query caching is enabled, Grafana can temporarily store the results of data
The caching backend to use when storing cached queries. Options: `memory`, `redis`, and `memcached`.
The default is `memory`.
### enabled
Setting 'enabled' to `true` allows users to configure query caching for data sources.
@ -357,33 +359,44 @@ _Time to live_ (TTL) is the time that a query result is stored in the caching sy
This value limits the size of a single cache value. If a cache value (or query result) exceeds this size, then it is not cached. To disable this limit, set this value to `0`.
The default is `1`.
## [caching.memory]
### gc_interval
When storing cache data in-memory, this setting defines how often a background process cleans up stale data from the in-memory cache. More frequent "garbage collection" can keep memory usage from climbing but will increase CPU usage.
The default is `1m`.
### max_size_mb
The maximum size of the in-memory cache in megabytes. Once this size is reached, new cache items are rejected. For more flexible control over cache eviction policies and size, use the Redis or Memcached backend.
To disable the maximum, set this value to `0`.
To disable the maximum, set this value to `0`.
The default is `25`.
> **Note:** Disabling the maximum is not recommended in production environments.
## [caching.redis]
### url
The full Redis URL of your Redis server. Example: `redis://localhost:6739/0`.
The default is `"redis://localhost:6379"`.
### prefix
A string that prefixes all Redis keys. This value must be set if using a shared database in Redis. If `prefix` is empty, then one will not be used.
The default is `"grafana"`.
## [caching.memcached]
### memcached_servers
A space-separated list of memcached servers. Example: `memcached-server-1:11211 memcached-server-2:11212 memcached-server-3:11211`. Or if there's only one server: `memcached-server:11211`
A space-separated list of memcached servers. Example: `memcached-server-1:11211 memcached-server-2:11212 memcached-server-3:11211`. Or if there's only one server: `memcached-server:11211`.
The default is `"localhost:11211"`.