Data stream backing index size

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):
2.14.0
RHEL8
Google Chrome

Describe the issue:
Hi,

I am trying to determine how to control the size of backing indices for a data stream. I have a data stream running, but it now has 300+ tiny backing indices ranging from 2.5 - 3.0 mb and each holding around 3000 documents.

How do I change this and what is the recommended sizing for backing indices?

Thanks

It seems that your data stream rollovers too frequently, is there a ISM policy attached to the data stream? You may check the rollover action in the ISM policy, and it’s recommended that the rollover action executes when the primary shard size exceeds 50GB: