You can monitor the CPU, the RAM and the NAND usage through the Manager GUI System resources page.
The top program can also show you CPU and memory usage of the running processes.
NAND flash usage
The LORIX One ships either with a 256MB or a 512MB internal flash memory. You may notice on the usage graph values that you have less that that available. This is due to the space used by the system and by the powerful file-system architecture that will bring you robustness with easy update. The space used by the system is not shown on the graph so you should start with a 100% free space graph.