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in RAC by ACE (20,920 points)

1 Answer

by ACE (20,920 points)
  • An OS scheduler problem.  For example, if the OS is getting locked up in a driver or hardware or there is excessive amounts of load on the machine (at or near 100% cpu utilization), thus preventing the scheduler from behaving reasonably.
  • A thread(s) within the CSS daemon hung.
  • An Oracle bug.
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