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Very Slow Performance While Import For Particular Table (Doc ID 305211.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.1 to 11.2.0.2 [Release 9.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 04-Jul-2014***

Symptoms

Traditional import (imp) is slow on a particular table. Process state dump shows, imp is waiting for 'log file sync':

    application name: imp (TNS V1-V3), hash value=0
    waiting for 'log file sync' blocking sess=0x0 seq=4338 wait_time=0


If you import with COMMIT=N, the import is quick.

From event 10046 you always see the waiting statement:

INSERT /*+NESTED_TABLE_SET_REFS+*/ INTO ...

Cause

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In this Document
Symptoms
Cause
Solution
References

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