SQLLDR Shows High CPU Usage On Internal Select From LOADER_COL_FLAGS
(Doc ID 2126508.1)
Last updated on FEBRUARY 26, 2019
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
Large SQLLDR jobs can use excessive system CPU, with a large portion of the usage due to internal SQLLDR call to LOADER_COL_FLAGS checking for virtual columns:
Select 'x' from loader_col_flags l where l.table_owner=:owner and l.table_name=:tname and l.colname=:cname and l.isvirtual='Y'
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