I got an alert The transaction log for database 'mydb' is full due to 'LOG_BACKUP', it fills the log.
And I checked the database is 32 GB, and set to grow 64 mg for data file and log file. Unlimited growth.
I also do transaction log backup every 3 hours. and I see them successful.
This messages comes up since Sunday to Monday which is today, I did not see it before.
What does this mean?