Supported page sizes by processor type
Use the pagesize command with the -a option to determine all of the page sizes supported by AIX® on a particular system.
AIX 6.1 and later supports segments with two page sizes: 4 KB and 64 KB. By default, processes use these variable page size segments. This is overridden by the existing page size selection mechanism.
Page Size | Required Hardware | Requires User Configuration | Restricted |
---|---|---|---|
4 KB | ALL | No | No |
64 KB | POWER5+ or later | No | No |
16 MB | POWER4 or later | Yes | Yes |
16 GB | POWER5+ or later | Yes | Yes |
Segment Base Page Size | Supported Page Sizes | Minimum Required Hardware |
---|---|---|
4 KB | 4 KB/64 KB | POWER6® |
64 KB | 64 KB | POWER5+ |
16 MB | 16 MB | POWER4 |
16 GB | 16 GB | POWER5+ |
As with all previous versions of AIX, 4 KB is the default page size. A process will continue to use 4 KB pages unless a user specifically requests another page size be used.