CTAS can show significant HV enqueue wait time in RAC environments. Rediscovery Notes: This fix introduces an enhancement for direct patch inserts / CTAS on RAC Systems. Note: This fix has caused problems as described in bug 10113090.
An ORA-600 [kxfxGetHVEnqMstr1] may be encountered when executing a direct path insert / Create Table as Select (CTAS). Workaround Disable HVE (HV enqueue) remastering on participating load instances via fix control. eg: to disable it in a SQL session that attempts the direct load/CTAS operation:alter session set "_fix_control"='8198783:OFF'(HVE = HV enqueue is the direct loader high watermark enqueue) Note: This fix just changes the default "_fix_control" value for bug 8198783 to OFF .
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