Increase trash deletion time

Hi,

In the Admin guide I seen a note stating that it is possible to increase the time of the auto delete option in Trash.

NOTE: You can even change the number of days after which the requests should be deleted from the trash by changing the GlobalConfig table entry.

Now I have looked though the GlobalConfig table but I could not find ant setting that looks to be related to "Trash".

Can you please let me know how I can increase the deletion time?

I am on build 7936.

Best regards,

Allistair