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In a failover situation , it is possible to lose some transactions from one or more logs that have not yet been transmitted . The Log Files property page shows information about archived redo logs that have not been applied to the standby site . Specifies the number of archived redo logs that log apply services should apply immediately to the physical standby database , temporarily overriding any previously specified apply delay interval . Ensure all Departmental systems and networks generate audit logs that show addition , modification , and / or deletion of information . Both the zombie machine syndrome and the hard lock ups are frustrating because they provide no errors on the console or in logs that give any clue as to the nature of the failure and make the machine sufficiently inoperable as to make it impossible to dig around and examine the state of things . Every time they take a truck with logs that have bark on them , the beetle infested bark drops off , and the beetles spread .