I noted that in last 15 days the number of alternate names grows very rapidly. From import of December 30th to January 6th the number was increased of 140000 alternate names. Did you find this number or has my procedure some bug? The strange thing is that the daily file of changes doesn't have all these rows.(maximum 100 rows per day).
We have been updating the database with an external datasource (nga) and the alternate name history for the daily modification does not included entries that are directly inserted in the alternatename and alternatename history without updating the main toponym history table.