I'm having similar problem here, but with extreme case.
The log files for the generator reached the size of 680 GB, yes GB.
And my server CPU reached of 100%, and stopped working many times.
Its very confusing, I'm sure there is something wrong, my site have no more than 50,000 URLs, but that for sure will not need of this resources.
I will appreciate if you take a look at generator configuration.
I will send you the URL of my site in private message, hopefully you can fix it.