Update FAQ for bulk updates KV (#22170)

* Update limits.mdx

* update faq for limits re 1000 limits and bulk reads

Author: thomasgauvin

src/content/docs/kv/api/read-key-value-pairs.mdx

@@ -253,6 +253,12 @@ The `cacheTtl` parameter must be an integer greater than or equal to `60`, which
 
 The effective `cacheTtl` of an already cached item can be reduced by getting it again with a lower `cacheTtl`. For example, if you did `NAMESPACE.get(key, {cacheTtl: 86400})` but later realized that caching for 24 hours was too long, you could `NAMESPACE.get(key, {cacheTtl: 300})` or even `NAMESPACE.get(key)` and it would check for newer data to respect the provided `cacheTtl`, which defaults to 60 seconds.
 
+### Requesting more keys per Worker invocation with bulk requests
+
+Workers are limited to 1000 operations to external services per invocation. This applies to Workers KV, as documented in [Workers KV limits](/kv/platform/limits/). 
+
+To read more than 1000 keys per operation, you can use the bulk read operations to read multiple keys in a single operation. These count as a single operation against the 1000 operation limit. 
+
 ## Other methods to access KV
 
 You can [read key-value pairs from the command line with Wrangler](/kv/reference/kv-commands/#kv-key-get) and [from the REST API](/api/resources/kv/subresources/namespaces/subresources/values/methods/get/).

src/content/docs/kv/platform/limits.mdx

@@ -25,7 +25,7 @@ import { Render } from "~/components"
 | Value size                        | 25 MiB                | 25 MiB       |
 | Minimum [`cacheTtl`](/kv/api/read-key-value-pairs/#cachettl-parameter)         | 60 seconds            | 60 seconds   |
 
-[^1]: Within a single invocation, a Worker can make up to 1,000 operations to external services (for example, 500 Workers KV reads and 500 R2 reads).
+[^1]: Within a single invocation, a Worker can make up to 1,000 operations to external services (for example, 500 Workers KV reads and 500 R2 reads). A bulk request to Workers KV counts for 1 request to an external service.
 
 <Render file="limits_increase" product="workers" />
 

src/content/docs/kv/reference/faq.mdx

@@ -28,6 +28,11 @@ Workers KV stores data in central stores and replicates the data to all Cloudfla
 
 Refer to [How KV works](/kv/concepts/how-kv-works/).
 
+### If a Worker makes a bulk request to Workers KV, would each individual key get counted against the [Worker subrequest limit (of 1000)](/kv/platform/limits/)?
+
+No. A bulk request to Workers KV, regardless of the amount of keys included in the request, will count as a single operation. For example, you could make
+500 bulk KV requests and 500 R2 requests for a total of 1000 operations. 
+
 ## Pricing
 
 ### When writing via Workers KV's [REST API](/api/resources/kv/subresources/namespaces/methods/bulk_update/), how are writes charged?