MySQL has problems creating threads under RH 6.0 due to
what looks like a glibc2 bug. This is actually a regression
to a bug in an earlier release of RH.

If you compile MySQL and then try to run safe_mysqld, it
looks like everything works fine until you take a look and
see that only one MySQL process/thread is running when in
fact three threads are supposed to be created upon MySQL
startup. As a result, the mysqld daemon is useless. It does
not create its unix socket nor does it listen on port 3306
as it's supposed to.

When I had this problem on RH 5.1, upgrading to the latest
glibc libraries fixed the problem. After upgrading to RH
6.0, the problem is back again.

Note that this is on a sun4c workstation (SPARCstation 2).

I don't know whether the regression occured at GNU or at
RedHat, so I'm submitting it here for you to figure out. :)