Hi all,

I have a problem here where my customer want to put the file on the site and the file size is 613Mb. I upload into the system without a problem because I uploaded through the backend; however, when the customer tried to downloaded, the site is freezed and the site performance become slow. Is there any workaround on this? I created separate app pool for this site and I already uncheck the maximum server memory. Is there any other things I can do to allow downloading such a big file like this? 

Go into the web.config and modify the httpruntime element to have a MaxRequestLength to be probably triple what it is now. Also make sure your excecutionTimeout is set to a sufficient time (in seconds) to accomodate the new MaxRequestLength. 

Here is what Microsoft has to say on the topic:

http://support.microsoft.com/default.aspx?scid=kb;EN-US;295626

Limiting the maximumRequestLength is never a good idea, as it exposes your web server to Denial of Service (DOS) attacks (if it is in a public realm).  In addition, it is not user-friendly to provide a file that large to end-users, as the download time is not acceptable.  I would suggest that you find a way around this, if you can.