The memory monitor shows information about system memory (RAM) usage.

Process Virtual Memory Usage
Maximum: Maximum allowed memory (RAM) usage for the process. This number is system dependant and will vary from 2,000KB (2GB) on 32bit systems to 4,000KB (4GB) on 64bit systems. In reality the maximum size range form 1.8GB to 3.7GB
Available: The amount of remaining available memory
Used: The current memory usage. The colored bar below the number shows the memory usage compared to the amount of available memory

Physical System Memory
Total: The total installed memory (RAM) on the system
Available: Unused physical memory. This number should always be well above zero. If this number is very small the system will slow down considerably.

Page File
Total: Total size of system page file
Available: Available page file memory.