Vector DB Write node loop execution does not resolves — how to verify writes and index limits?

I'm trying to create a knowledge base using a workflow that uses Vector DB Write nodes. The number of JSON objects I'm trying to store is around ~14K and the total size that would be stored would be approximately ~5Mb. I'm using a vector DB write node inside a For Loop. I have been constantly encountering that the status for the For loop stays running even when the debug chat says the workflow is done executing, which makes it unclear if all the objects were stored in the Vector DB. This raise a couple of questions :

1. How can we see the metadata about the index that was created in a workflow. For example, size or number of objects/documents stored in the vector db?