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Unimus is written in Java. In Java, a software package can specify its memory limitations, or it can use the default ones provided by the JVM (Java environment) installed.
In case of x86 Oracle x64 JVM,   default max memory usage is 1GB4GB.
In case of x64 Oracle x86 JVM, default max memory usage is 4GB 1GB. The philosophy of Java is that if all the stuff you need is in memory, the application is faster (or course, at the expense of memory usage). This basically means that the garbage collector is not executed by the JVM until memory consumption of the application gets close to the limit, or until system memory starts running out.

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So the actual RAM utilization of Unimus will depend on how its memory limits are configured, as well as how many devices you have, how often you run backups, etc. - basically on how utilized the software is.

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By default, Unimus is configured to use 768MB use around 1.2GB of RAM at maximum. This configuration is split between 2 main parts:

• maximum heap size limit - configured by the "-Xmx" configuration parameter
  
• other Java memory assignments which are left at default JVM values

The "-Xmx" configuration is set to 768 MB by default, and the other Java memory pools consume around an additional 400 MB.

This can be changed by the user.

Changing RAM limit assignment

RAM assignment to Unimus can be configured.

Our recommendations for memory assignment can be found in the Hardware Sizing Guide here on the wiki.
(you can use the values there as the -Xmx argument for the JVM)

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