In those times when you are able to reach the workstation via SSH, what have you been able to discover? (e.g.: top(1), systat(1), vmstat(8), etc.)
In those times when you are not able to use SSH, what have you been able to discover? (eg. setting ddb.panic=0 to avoid dropping into ddb, or setting ddb.console=1 and invoking ddb through one of the console methods and blindly typing boot crash, etc.)
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