Hi @Jithin M V Thank you for posting your Question on Microsoft Q&A.
When you start the indexing change, we’ll use all of your available throughput to do the indexing transformation. In this case, because it’s a serverless container, we will use up to 5,000 RU/s (since serverless containers can consume up to 5,000 RUs per second). At this time, we do not charge for those RUs but we’ll never use more than 5,000 RU/s total (combining CRUD and queries and indexing transformation).
Please let me know if that help