When doing an upgrade on a Redhat 6.1 intel box to 6.2. Anaconda in X (the installer) takes upwards of ten MINUTES just for the "perparing to install" progress bar to finish before the installer evern starts to upgrade. There is no disk access. Running "top" from VC2 shows anaconda eating 100% cpu ,and over 40% or RAM. the System is a Dual Celeron 500 (NOT-overclocked), All SCSI disks, one IDE Cdrom (which the installer was running from)
The installer was resolving dependencies between old and new packages, which can be an intensive processive depending on the package set installed.