Slow DataPump Import (IMPDP) From Tables With Many Subpartitions (Doc ID 867678.1)

Last updated on JUNE 04, 2013

Applies to:

Oracle Database - Enterprise Edition - Version 11.1.0.7 to 11.1.0.7 [Release 11.1]
Information in this document applies to any platform.
***Checked for relevance on 04-Jun-2013***

Symptoms

DataPump import (IMPDP) is slow during importing a table with many subpartitions (+150 subpartitions)

The most expensive SQL statement is:

SELECT /*+rule*/ SYS_XMLGEN(VALUE(KU$), XMLFORMAT.createFormat2('TABLE_T','7')), KU$.OBJ_NUM
FROM SYS.KU$_PHTABLE_VIEW KU$
WHERE NOT BITAND(KU$.SCHEMA_OBJ.FLAGS, 128)!=0
AND KU$.SCHEMA_OBJ.OWNER_NAME=:SCHEMA1
AND KU$.SCHEMA_OBJ.NAME=:NAME2

Cause

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