Control file Autobackup is being deleted despite there being no space pressures
I recently noticed that this autobackup is being deleted automatically, this is listed in the alert log such as;
Deleted Oracle managed file /u06/flash_recovery_area/SID/autobackup/2013_11_21/o1_mf_s_832106074_98wvltqq_.bkp
There is plenty of space in the filesystem and the space reclaimed isn't significant.
How can I prevent this?
Many thanks in advance