I have a 16 TB database on an AIX server, power 7 running Oracle 12c and do an online level 0 backup once a week and level 1 incremental backups 5 times a week. I normally use OEM to setup and schedule my backups bu have been having problems with OEM so I've been doing them manually with the code I copied from OEM.
The level 0 backups usually take about 40 hours but 2 weeks ago it took 5 days and the one started this weekend has been running for 3 days and is still running.
I've been looking on the web for ways to troubleshoot the problem but haven't found much. If anyone has suggestions of where I can start looking, I would greatly appreciate it.
Here's the script I've been running:
backup incremental level 0 cumulative device type disk tag '%TAG' database;
backup device type disk tag '%TAG' archivelog all not backed up delete all input;
allocate channel for maintenance type disk;
delete noprompt obsolete device type disk;
release channel;