Please make sure to properly configure memory allowance of Unimus Core:
Configuring memory usage
RAM requirement is for the Unimus Core service only.
You have to have the required amount of RAM for the OS and other services on the system.
512 MB RAM
2-core CPU
1 GB RAM
2-core CPU
2 GB RAM
4-core CPU
4 GB RAM
8-core CPU
Please contact us to properly specify the environment needs for your deployment.