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AWS opensearch-service documentation change

Service: opensearch-service · 2026-05-13 · Documentation low

File: opensearch-service/latest/developerguide/serverless-overview.md

Summary

Updated OCU sharing constraints for collections with unique KMS keys

Security assessment

Clarifies resource allocation rules for encrypted collections but contains no security-specific content or vulnerability fixes. Purely operational documentation update.

Diff

diff --git a/opensearch-service/latest/developerguide/serverless-overview.md b/opensearch-service/latest/developerguide/serverless-overview.md
index 2f30e2fdf..098ef84a8 100644
--- a//opensearch-service/latest/developerguide/serverless-overview.md
+++ b//opensearch-service/latest/developerguide/serverless-overview.md
@@ -130 +130 @@ OpenSearch Serverless adds additional OCUs in increments of 1 OCU based on the c
-Collections with unique AWS KMS keys can't share OCUs with other collections.
+Collections with unique AWS KMS keys can't share OCUs with other collections unless they are part of the same collection group. For more information, see [Collection groups](https://docs.aws.amazon.com/opensearch-service/latest/developerguide/serverless-collection-groups.html).