ES 2.2 Elasticsearch indexing error - cloud related?

Recently my cloudhosted forum started getting this error on searches. Specifically;

XFES\Elasticsearch\RequestException: Elasticsearch indexing error (queued): index [xenforo_live] blocked by: [TOO_MANY_REQUESTS/12/disk usage exceeded flood-stage watermark, index has read-only-allow-delete block]; src/addons/XFES/Elasticsearch/Api.php:424

I'm using the basic plan for Xenforo cloud and my forum recently passed 130k messages. Given what I've read I'm assuming this is a case of the cloud server not having the resources needed to search this much data, but I'd like to confirm and make sure before I look into upgrading. Can post a full stack trace if needed.
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