[Mediawiki-l] Where the wiki sidewalk ends?

[revansx at cox.net]

Hi all, I'm looking at my wiki's mysql database using phpMyAdmin and I see that the page table defines the primary key (page_id) as an unsigned int(8). Which got me thinking, 1) what is the maximum number of wiki articles possible and 2) what is the failure mode (i.e what happens). Does it generate an error? Does is apologize? Also, does moving a page bring the wiki one step closer to its limit? 

thanks,
- rich (revansx)