The Kernel Messages user menu of the DBA Cockpit contains, among other things, a display of the log files that were backed up during a database crash, as well as the kernel message history. Normally, at least the kernel log knldiag, the database trace log knltrace, and the memory dump rtedump are backed up if the database crashes. These files are in a subdirectory of the directory diaghistory, where they can be used for diagnoses.