MetaMatrix Text File Connector hangs when using a large data file

Issue

• We have created a model for a text file data source and the text file has 90,000 records and 98 columns.
• I ran the query in the MetaMatrix Designer and it is taking forever to return results from this file. If I use a LIMIT 16000 clause, it returns 16000 records.  But if I add even 16001,  it is not returning results and keeps running so I have to cancel the query.