Add document limits to index and bulk pages

_api-reference/document-apis/bulk.md

@@ -14,6 +14,9 @@ Introduced 1.0
 The bulk operation lets you add, update, or delete multiple documents in a single request. Compared to individual OpenSearch indexing requests, the bulk operation has significant performance benefits. Whenever practical, we recommend batching indexing operations into bulk requests.
 
 
+Beginning in OpenSearch 2.9, the bulk operation will contain a memory limit for each document in the request of 512mb or less.
+{: .note}
+
 ## Example
 
 ```json

_im-plugin/index.md

@@ -16,6 +16,8 @@ You index data using the OpenSearch REST API. Two APIs exist: the index API and
 
 For situations in which new data arrives incrementally (for example, customer orders from a small business), you might use the index API to add documents individually as they arrive. For situations in which the flow of data is less frequent (for example, weekly updates to a marketing website), you might prefer to generate a file and send it to the `_bulk` API. For large numbers of documents, lumping requests together and using the `_bulk` API offers superior performance. If your documents are enormous, however, you might need to index them individually.
 
+To make sure that many documents can be indexed through both index API and bulk API are manageable, each document inside an index must be less than 512mb. 
+
 
 ## Introduction to indexing
 
@@ -91,6 +93,8 @@ OpenSearch indexes have the following naming restrictions:
 
   `:`, `"`, `*`, `+`, `/`, `\`, `|`, `?`, `#`, `>`, or `<`
 
+
+
 ## Read data
 
 After you index a document, you can retrieve it by sending a GET request to the same endpoint that you used for indexing: