OTM - Storage Limit Documentation + Performance/Potential Risks

Summary:

When uploading documents to OTM:

1 - Where are they stored?

2 - What is the memory limit that can be reached?

3 - Is there an automatic purge every X amount of time? If not, could it be scheduled in some way?

4 - Regarding the upload of documents, is there any type of risk to the system's performance?

Content (please ensure you mask any confidential information):

We implemented uploading documentation in our production environment more than 1 year ago, but we are unaware of some questions.

We know the existence of documents and their size through the following query:

select document_content_gid, DBMS_LOB.GetLength(blob_content)/1024 AS Filesize_KB from document_content