Paging of program code 1

[ciman]

Hi,
do program code pages (Esid=1) ever get paged out to paging space?

It may be a performance issue if the disks for paging space are much faster than the persistent location of the executable.

Thanx
ciman

 

[blarneyme]

Computational memory consists of pages belonging to working storage or program text segments. It includes working storage memory or processes (stack, data, bss, the kernel text and data, kernel extensions, shared library data, and shared memory segments.)

Segment 1 is application program text. AIX gives preferential treatment to executables and, as such, treats executable file pages as computational pages.

 

[ciman]

Thank you for your reply.

I know that program text is treated as computational, but my question was: does it get paged out? It can't get dirty because it's read-only. So it only has to be reread, if performance is of no concern.

ciman

 

[blarneyme]

A program's text pages can't be modified and are never paged out. Text pages that are no longer needed are purged.