how many page WP can handle with out causing problem ? i believe some one will said unlimited but i think it should have some limit after certain page ...
Pages specifically? In theory it should be unlimited but you'll start noticing slowdown of both the Dashboard and the blog itself after about 500 or so. I'd have to did for reference links. It's one of those long outstanding issues where it works for some and not for others. Using a file cache like wp-super-cache will probably help as that bypasses the wordpress system once the page has been created.
As said above depends on your hosting. Would defiantly suggest installing WP Super Cache no matter how many pages you have. It works great
guy if i used VPS would it be better ? i have around 30k post in less then 3week, so i believe i going to hit 100k post in very short time .....
too many plugins like bstat,related post,wp slimstat it's no good and you will be suspended by your hosting
try wp super cache plugin, wordpress blog hosting is best for large wp blogs as it will not hit cpu resources, always keep ur db optimize.