SQL anywhere 16 -wasted disk space

Hello, all

Database, which has only around 30M of actual data has grown to 800,000MB due to user error (500,000 rows were inserted into one table, and later deleted).

Is there a way to "compress" the DB file, so it would not take so much disk space without rebuilding the whole DB? I do not want to take the users off line for something that does not actually interfere with their work.