Hello @Raumen837,
The amount of requests is in direct correlation to the amount of actions being done from the various interfaces, obviously.
Where it makes sense, the API requests do get cached, of course but still with a big enough load, yes, it can reach that number. I would make sure Memcache is correctly set up and that the permissions on the various cache directories are such that they can be written to from both the Apache ['apache' on RHEL/CentOS, www-data on Debian/Ubuntu] and 'kaltura' user, if there is an issue there, then obviously requests will not be cached and that can be a problem.