Does the portal cache worksets?

Hello,

I have a simple question (I think 😉)

Does EP 6 cache portions of the content on the server?

For example, I change the name of a visible workset in ESS, yet the change doesn't show up in the user browser.

I have an uneasy sense that I'm doing something wrong, but I can't quite see what (I checked Delta connections, ESS entries, ...).

If cached, is there a way to refresh cached content without restarting J2EE?

Thank you.