I am in the process of setting up a VPS to host my web and mail server. With Tektonic, the latest version of Fedora that is available is Fedora Core 2. The version of db4 that was included with Fedora Core 2 had a problem with non Intel CPUs. Bug 91933 at Red Hat's Bugzilla system describes this problem.
This bug report also has a work around. It requires rebuilding db4 with
spec file that doesn't use posix mutexes.
Here is the spec file
Here is a patch file
Here is a needed wrapper script.