# Limitations

* **Connection Limits:** The maximum concurrent connections applicable is based on total cluster memory. The connection limit is based on: **(RAM in GB − 2 GB system reserve) / 2 = max connections (in thousands)**. For more information, see [<mark style="color:blue;">Formula for Maximum Connections</mark>](/cloud/databases/mongodb/overview/sizing.md#tune-connections-and-pools).
* **CPU:** The total upper limit for CPU cores depends on your quota. A single instance cannot exceed 31 cores.
* **RAM:** The total upper limit for RAM depends on your quota. A single instance cannot exceed 230 GB.
* **Storage:** The upper limit for storage size is 4 TB.
* **Backups:** Storing cluster backups is limited to the last 7 days. Deleting a cluster also immediately removes all backups of it.
* **IP Ranges:** The following IP ranges cannot be used with our MongoDB services:
  * `172.16.0.0/12`
  * `192.168.230.0/24`
  * `10.208.0.0/12`

{% hint style="info" %}
**Note:** To scale resources in the **Enterprise** edition, contact [<mark style="color:blue;">IONOS CLOUD Support</mark>](https://docs.ionos.com/cloud/support/general-information/contact-information).
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.ionos.com/cloud/databases/mongodb/overview/limitations.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.