OpenVMS Alpha Internals and Data Structures

This book provides a detailed look at the memory management subsystem of OpenVMS Alpha Version 7.3. It covers virtual and physical memory concepts, the virtual address space layout, page table hierarchies, and the Translation Buffer (TB). Additionally, it describes memory management data structures such as the Process Header (PHD), Process Section Table (PST), PFN database, and pool management structures. The document also explains paging dynamics, including page fault handling, page read clustering, modified page writing, and the swapping mechanism for moving process working sets in and out of memory. Finally, it details relevant system services for virtual address space and pool management.