KVM-clock switch triggers ORA-600 during autoscaling task in Exadata
Applies to:
Linux OS - Version Oracle Linux 6.10 and later
Linux x86-64
Symptoms
After CPUs being hot-added, Oracle Database processes may show ORA-600 errors, similar to the ones below.
ORA-00600: internal error code, arguments: [ossdisk_exceeded_lease_time], [2946044663766], [2946044663041], [], [], [], [], [], [], [], [], [] 2023-03-07T13:46:49.237829-06:00 ERROR: unrecoverable error ORA-600 raised in ASM I/O path; terminating process 228282 Process termination requested for pid 228282 [source = rdbms], [info = 2] [request issued by pid: 228282, uid: 1001] 2023-03-07T13:46:49.414461-06:00 Dumping diagnostic data in directory=[cdmp_20230307134649], requested by (instance=3, osid=228282 (PR00)), summary=[incident=287401]. 2023-03-07T13:46:52.536937-06:00
Changes
Autoscaling CPUs for KVM instances.
Cause
Guest clock source switched from tsc to kvm-clock during hot-add CPUs.
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