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DataPump Metrics=Y Can Sometimes Incorrectly Show Negative Elapsed Time (Doc ID 2301604.1)

Last updated on OCTOBER 08, 2020

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 12.1 to 12.2]
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database 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.


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The METRICS=Y parameter for DataPump export and import will generate additional log information showing the elapsed time required to export or import object types or individual tables in the DataPump job.
In some cases the elapsed time can be displayed as a negative number as shown below:

24-AUG-17 19:36:21.553: . . exported "TESTUSER"."TABLE1" 562.8 MB 339497 rows in 248 seconds
24-AUG-17 19:38:09.925: . . exported "TESTUSER"."TABLE2" 189.5 MB 174462 rows in 108 seconds
25-AUG-17 03:07:01.218: . . exported "TESTUSER"."TABLE3" 253.2 GB 543008 rows in -59468 seconds
25-AUG-17 06:38:21.841: . . exported "TESTUSER"."TABLE4" 253.3 GB 498805 rows in 12680 seconds
25-AUG-17 06:38:26.864: . . exported "TESTUSER"."TABLE5" 154.7 MB 1734347 rows in 5 seconds

Why would a table in the export logfile show a negative elapsed time value? 


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