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RE: import question

From: Hately Mike <>
Date: Mon, 29 Jul 2002 08:28:49 -0800
Message-ID: <>

I've never seen anything to suggest that exportijng using DIRECT=Y speeded up subsequent imports. I'd be interested to know if this is really the case but I doubt it. The structure of an export file is exactly the same whatever the DIRECT setting. But I've been wrong before ...

Things I'd suggest would be:

Obviously some of these suggestions may not suit your needs.

Mike Hately
Oracle DBA

-----Original Message-----
Sent: 29 July 2002 15:38
To: Multiple recipients of list ORACLE-L

If the Export has been taken with DIRECT = Y, meaning that the SQL Evaluation buffer has to be bypassed then Import would not generate the Redo buffer while Importing back the objects and the relevant data.

While Export it just bypasses the SQL Evaluation buffer,make it faster and directly put things in TTC buffer recognized by Import of Oracle

If that option was not selected, frequent commit would enable the checkpoint more often and thus LGWR writing the buffers to redo logs more often. Enable a buffer size which could be substantial high, so that more number of rows could be extracted from the Export file in an array thus boosting the perf.

Vikas Khanna

-----Original Message-----
Sent: Monday, July 29, 2002 5:58 PM
To: Multiple recipients of list ORACLE-L


We are importing a large amount of data and uit is generating a huge amount of there any way of avoiding this- unfortunately this is on an 8.0.6 database??

Any help/advice would be appreciated!!



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Author: Hately Mike

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Received on Mon Jul 29 2002 - 11:28:49 CDT

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