William L. Maltby wrote:
Also, if a package that is currently running has been updated, or that package is currently using a package which has been updated and you want the currently running things to start using the new stuff _now_, you'll want to restart those packages. Until those packages end, disk space and ram memory is not finally freed.
many service RPMs seem to do the restart automatically, I've noticed this with Postgres servers, at least. of course, restarting a database server can interrupt any running processes that are using it...