When using a more recent Apache version than the default 2.0.46 that ships with Red Hat Enterprise Linux 3.0, you may find that when configured for ColdFusion MX 6.1 (with or without Updater 1), the Apache httpd process chronically experiences high CPU utilization immediately and all page requests for cfm or htms hang.

I've seen the problem with either several httpd processes using around 19% or one httpd process using 98%, shown here: