Radius Authentication

Dear All, i'm using freeradius 1.1.0 . i'm facing a little problem. in some times my mysql DB server is down & the radius can't insert records into it of-course, so the users can't login as the radius doesn't authenticate them unless he can record them. Is there any solution to make the radius authenticate the users without insert records in the DB. thanks for your help -- regards, Amr el-Saeed