What could be the consequences if the system runs out of all available RAM?

If the system exhausts all available RAM, the following consequences may occur:

• Slowing down: The OS will start actively using swapping (moving data from RAM to disk), which significantly reduces performance.
• Application crashes: Applications may crash due to inability to allocate memory.
• System errors: Errors and failures in the OS operation are possible, up to hanging or rebooting.
• Process killer (OOM Killer): In Android, the system may forcibly terminate processes to free up memory.

For example, in Android, when memory is low, the system may kill background applications to free resources for the active application.