Benefits for 64-bit Applications

Applications that are limited by the 32-bit address space need to transition to 64-bit mode. Potential examples include:

The advantages of transitioning applications from 32-bit mode to 64-bit mode include:

Large file caches on systems with large physical memory
Database servers have improved performance when they can load significant portions of the database into memory.
Large process data space mapped in a large virtual address space
Simulation programs need to be able to map the entire simulation model into virtual memory.
Large file support using standard system library calls
Some databases require data sets larger than 2 GB. It is simpler to store information for a large data set in a single file. 64-bit applications can use standard I/O routines to access files larger than 2 GB.

See Also: See “HP-UX 64-bit Performance Considerations” to learn about what impacts performance in 64-bit mode.

Technical documentation