44. Virtual Memory Manager (VMM)

• VMM is an interface between software and physical/virtual memory.

• VMM provides a set of memory addresses to each program.

• Memory is allocated in 4KB segments (pages).

• Pages are stored in RAM or swap file on the hard drive.

• Some guidelines for managing memory:

  • If drive space is limited, limit maximum size of page file.

  • If RAM space is limited, expand page file size to 4 GB.

  • Spread page file over several physical devices.

  • Do not completely eliminate virtual memory!