# Limitations

Following are a few limitations that you can encounter while using MariaDB.

* The total upper limit for the **Number of CPUs** depends on your quota. A single instance cannot exceed 16 cores. For more information, see [<mark style="color:blue;">Select the required number of resources</mark>](https://docs.ionos.com/sections-test/guides/databases/dcd-how-tos/set-up-mariadb-cluster#select-the-required-number-of-resources).
* The total upper limit for **RAM Size** depends on your quota. A single instance cannot exceed 32 GB.
* The upper limit for **Storage Size** is 2 TB.
* Storing cluster backups in an IONOS Cloud Object Storage is limited to the last seven days.
* The following IP ranges cannot be used with MariaDB services:
  * `10.208.0.0/12`
  * `10.233.0.0/18`
  * `192.168.230.0/24`
  * `10.233.64.0/18`