We're facing performance issues in one of our servers which is hosting a website with ~50k users a month.
We've been discussing different options to improve the performance and we're currently using Akamai's reverse proxy service to free the server load by serving cached pages and resources from their global servers.
By doing this we began experiencing some issues with the cache on dinamically driven pages such as "User A try to login but the page renders as if User B is logged in" kind of issues.
Akamai can add exceptions allowing some pages not to be cached, but the problem is we're running joomla and when this website was built, they didn't enabled Pretty URLs, so everything's going through index.php and Akamai CANNOT add exceptions with query strings in it (index.php?var=val).
The current url style is something like this: /index.php?option=com_content&task=blogcategory&id=618&Itemid=1123
In order to add exceptions to akamai, we'd have to enable pretty url's, but the site is HUGE and there's a lot of content with relative resources (img src="templates/....jpg") so if we enable Pretty URLs, the site's images and resources will break (we'd have to fix the whole bunch of content).
Do you guys have any other idea of what could we do? Maybe we didn't think of something and you do?
Have any of you any experience with Akamai cache service?