Backup problem: "Fatal error: Allowed memory..."

[eluser]TheoR74[/eluser]
I am having a problem like this.

I have a script running at the prompt accepting data and writing it to a database. It seems if I comment out the db->insert commands, it doesn't have any memory issues, only on those commands. So, I'm wondering, is there something in that command that isn't freeing up memory? Or a variable that isn't getting cleared out where the multiple insert commands are too much for it? I looked at the db->insert code but kinda got lost.