> For the complete documentation index, see [llms.txt](https://docs.ionos.com/cloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ionos.com/cloud/databases/in-memory-db/overview/limitations.md).

# Limitations

The following are a few limitations that you can encounter while using In-Memory DB:

* You cannot use multiple In-Memory DB instances simultaneously, but each for a particular use case.
* You have access to ten default In-Memory DB instances, which are numbered to differentiate them. However, adding or renaming the instances after creation is impossible.
* The total upper limit for CPU cores depends on your quota. A single instance cannot exceed 16 cores.
* The total upper limit for RAM depends on your quota. A single instance cannot exceed 32 GB.
* The upper limit for storage size is 2 TB.
* Storing In-Memory DB instance backups in an <code class="expression">space.vars.ionos\_cloud\_object\_storage</code> is limited to the last seven days.
* The following IP ranges cannot be used with In-Memory DB services:
  * `10.208.0.0/12`
  * `10.233.0.0/18`
  * `192.168.230.0/24`
  * `10.233.64.0/18`


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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/in-memory-db/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.