Is there an easy wy to clear down the user tracking history.

I have over 54000 records in my user tracking database, but when I try to display this in myphp it will not because of memory usage errors.

Even if I try to display 5000 records it has this problem.

Any help appreciated.

Regards
Laurie

Ideally a reset button to clear down the history would be great, but no idea how to approach this.