[The M.I.P.]

Originally Posted by Zia

sounds nice...will it be a reason of heavy server load?

This depends on your server. If your server is already running with high loads, you will definitely experience a loss of performance.
It's a non-intrusive plugin, so just give it a try.

The Maxmind guys basically included an option to use shared memory on Un*x machines (requires PHP with --enable-shmop), so that file i/o can be reduced and the db is kept in memory only once.
While this is a good idea in principle, its implementation is not unproblematic (e.g. because there's only a fixed shm key). So I did not use it in this plugin - but feel free to extend it.

If you need high-performance geotargeting, you'd be better off with using a different approach like GeoIP Apache module.