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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 11.2.0.4 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.

Symptoms

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'

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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