As already pointed out by others, load averages of 67, 83 are abnormal. The 0.71 is ok, it should generally remain under 1. You technical staff need to come up with an explanation!
Apart from that, you haven't provided a single peace of information requested in the intro to this forum, I quote:
"Please include as much background information as possible about your hardware, the operating system, the web server, the database server, the PHP scripting framework, etc. If your machine is virtualized, also mention the host
hardware, the operating system, the virtualization technology used and the resources assigned to the guest OS. If you use a hosting service, mention either the hosting provider
and the package or the resources they've allocated to your Moodle instance."
Also the documentation on http://docs.moodle.org/en/Performance
(mentioned in the same intro as above) is compulsory before discussing performance of Moodle.
The 'advanced search facility' (linked in the same intro) is also handy in finding similar discussions in moodle.org.