Updating cached messages
Just remember that it's here, waiting for your triumphant return.On the other hand, you're probably hoping for massive amounts of traffic to reach your website very soon, an imminent sell-out to Google, and a good life drinking Margaritas in the Caribbean.In the illustration on the right, consider both the clients have a cached copy of a particular memory block from a previous read.Suppose the client on the bottom updates/changes that memory block, the client on the top could be left with an invalid cache of memory without any notification of the change.
If your website doesn't get a whole lot of traffic, then you can probably skip this chapter completely.
Knowing a little bit about the Wheels caching concepts will prepare you for this. You're on your own with those ;).) Consider a typical page on a Wheels website.