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RE: Import Question

From: Vergara, Michael (TEM) <mvergara_at_guidant.com>
Date: Fri, 9 Jul 2004 08:27:33 -0700
Message-ID: <791D0E1ECDECD04D89205F33806FC38701E91FEA@temmse06.tem.guidant.com>


Mark:

Oh...if only this were a conventional import!

This is an SAP system, and the export/import process uses a SAP-written utility called "R3load". That I know of, there are no settable parameters like the buffer parameter in an Oracle import.

R3load writes to a flat file than is encoded and compressed using SAP's proprietary programming. It works very well at the compression angle. A 1.5TB database exported out to just under 300GB of flat files.

The only tuning opportunities I have are on the database server. I can send out the whole initSID.ora file, but I thought that would be overkill for the first question.

Thanks for the support!

Mike

-----Original Message-----

From: Powell, Mark D [mailto:mark.powell_at_eds.com] Sent: Friday, July 09, 2004 8:16 AM
To: 'oracle-l_at_freelists.org'
Subject: RE: Import Question

Mike, don't you think it would be helpful to show us the import = parameters
in use?

If you are doing a conventional import then I would recommend you use a large buffer=3D value. If any of the exported options are unnecessary = for the
import such as grants then set the associated parameter off for the = import:
grants=3Dn. If the target tables exist and ignore=3Dy is in use and = some of
these tables are large drop the indexes so they do not have to be = maintained
during the table load. Either build them after or let the import = rebuild
them.

HTH -- Mark D Powell --

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Vergara, Michael (TEM)
Sent: Friday, July 09, 2004 10:53 AM
To: Oracle-L (E-mail)
Subject: Import Question

Hey gang...any suggestions on how to speed up an import?

I am trying to import to a new SAP database server. Oracle 9.2.0.5 on HP-UX11i. There appears to be a lot of I/O activity, but overall I get a feeling of the system dragging.

Some DB params are:

db_cache_size                     =3D3D 2147483648
log_buffer                        =3D3D 2097152
sort_area_retained_size           =3D3D 0
sort_area_size                    =3D3D 5242880
undo_management                   =3D3D AUTO
db_writer_processes               =3D3D 4
java_pool_size                    =3D3D 167772160

Any suggestions?

Thanks,
Mike

---

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Michael P. Vergara
Oracle DBA
Guidant Corporation
www.guidant.com <http://www.guidant.com/>



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Received on Fri Jul 09 2004 - 10:24:28 CDT

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