Rely on API docs for AS::Cache::Store options docs [ci-skip]

Author: jonathanhefner

guides/source/caching_with_rails.md

@@ -375,23 +375,11 @@ You can access the cache by calling `Rails.cache`.
 
 ### `ActiveSupport::Cache::Store`
 
-[`ActiveSupport::Cache::Store`][] provides the foundation for interacting with the cache in Rails. This is an abstract class and you cannot use it on its own. Rather you must use a concrete implementation of the class tied to a storage engine. Rails ships with several implementations documented below.
+[`ActiveSupport::Cache::Store`][] provides the foundation for interacting with the cache in Rails. This is an abstract class, and you cannot use it on its own. Instead, you must use a concrete implementation of the class tied to a storage engine. Rails ships with several implementations, documented below.
 
-The main methods to call are [`read`][ActiveSupport::Cache::Store#read], [`write`][ActiveSupport::Cache::Store#write], [`delete`][ActiveSupport::Cache::Store#delete], [`exist?`][ActiveSupport::Cache::Store#exist?], and [`fetch`][ActiveSupport::Cache::Store#fetch].
+The main API methods are [`read`][ActiveSupport::Cache::Store#read], [`write`][ActiveSupport::Cache::Store#write], [`delete`][ActiveSupport::Cache::Store#delete], [`exist?`][ActiveSupport::Cache::Store#exist?], and [`fetch`][ActiveSupport::Cache::Store#fetch].
 
-There are some common options that can be used by all cache implementations. These can be passed to the constructor or the various methods to interact with entries.
-
-* `:namespace` - This option can be used to create a namespace within the cache store. It is especially useful if your application shares a cache with other applications.
-
-* `:compress` - Enabled by default. Compresses cache entries so more data can be stored in the same memory footprint, leading to fewer cache evictions and higher hit rates.
-
-* `:compress_threshold` - Defaults to 1kB. Cache entries larger than this threshold, specified in bytes, are compressed.
-
-* `:expires_in` - This option sets an expiration time in seconds for the cache entry, if the cache store supports it, when it will be automatically removed from the cache.
-
-* `:race_condition_ttl` - This option is used in conjunction with the `:expires_in` option. It will prevent race conditions when cache entries expire by preventing multiple processes from simultaneously regenerating the same entry (also known as the dog pile effect). This option sets the number of seconds that an expired entry can be reused while a new value is being regenerated. It's a good practice to set this value if you use the `:expires_in` option.
-
-* `:coder` - This option replaces the default cache entry serialization mechanism with a custom one. The `coder` must respond to `dump` and `load`, and passing a custom coder disables automatic compression.
+Options passed to the cache store's constructor will be treated as default options for the appropriate API methods.
 
 [`ActiveSupport::Cache::Store`]: https://api.rubyonrails.org/classes/ActiveSupport/Cache/Store.html
 [ActiveSupport::Cache::Store#delete]: https://api.rubyonrails.org/classes/ActiveSupport/Cache/Store.html#method-i-delete
@@ -500,7 +488,7 @@ config.cache_store = :mem_cache_store # Will fallback to $MEMCACHE_SERVERS, then
 
 See the [`Dalli::Client` documentation](https://www.rubydoc.info/gems/dalli/Dalli/Client#initialize-instance_method) for supported address types.
 
-The [`write`][ActiveSupport::Cache::MemCacheStore#write] and `fetch` methods on this cache accept two additional options that take advantage of features specific to memcached. You can specify `:raw` to send a value directly to the server with no serialization. The value must be a string or number. You can use memcached direct operations like `increment` and `decrement` only on raw values. You can also specify `:unless_exist` if you don't want memcached to overwrite an existing entry.
+The [`write`][ActiveSupport::Cache::MemCacheStore#write] (and `fetch`) method on this cache accepts additional options that take advantage of features specific to memcached.
 
 [`ActiveSupport::Cache::MemCacheStore`]: https://api.rubyonrails.org/classes/ActiveSupport/Cache/MemCacheStore.html
 [ActiveSupport::Cache::MemCacheStore#write]: https://api.rubyonrails.org/classes/ActiveSupport/Cache/MemCacheStore.html#method-i-write