page faults are normal AIX behaviour ... content is written into memory - that is NORMAL behaviour and NOT a problem. It is just how VMM works:
AIX maps pages into real memory based on demand. When an application references a page that is not mapped into real memory, the system generates a page fault. To resolve the page fault, the AIX kernel loads the referenced page to a location in real memory. If the referenced page is a new page (that is, a page in a data heap of the process that has never been previously referenced), "loading" the referenced page simply means filling a real memory location with zeros (that is, providing a zero-filled page). If the referenced page is a pre-existing page (that is, a page in a file or a previously paged out page), loading the referenced page involves reading the page from the disk (paging space or disk file system) into a location in real memory.
Once a page is loaded into real memory, it is marked as unmodified. If a process or the kernel modifies the page, the state of the page changes to modified. This allows AIX to keep track of whether a page has been modified after it was loaded into memory.
Please read more
here
Apart from that your system is completely untuned. You should at least tune your lru_file_repage to 0 or your system will start swapping sooner or later what will cause REAL problems and your minperm/maxperm values are as well far away from any recommended values ...
Regards
zxmaus