Howdy, I have a question regards my website. Next week 30 000 users are going to hit my website at once and it will timeout. I want to put a message asking users to come back later and explain the problem (too many users at once). My site is a PHP/mySQL site on Linuz/Apache. I have a .htaccess file that usually deals with errors and I wass wondering if adding to this would cover me for 5++ errors (like 503, 509).

For example:

ErrorDocument 400
ErrorDocument 403
ErrorDocument 404
ErrorDocument 500
ErrorDocument 501
ErrorDocument 503
ErrorDocument 509

I'm confused that if mysite is downdue to demand can I redirect the user to a page that (although light in size) is actually on that domain (i.e.

Is this the right thing to do or do I need a subdomain?