Unlike locate in previous versions of RedHat, the default /etc/cron.daily/slocate.cron does not exclude non-local filesystems and will happily traverse them when building its database. On a system with a lot of NFS-mounted filesystems, or for servers with a lot of clients that mount from it, this may put a huge load on things.
assigned to notting
fixed in the cron script for slocate-1.4-5. It will now not index nfs,ncpfs,smbfs file systems by default.