Oracle export performance

Hi!
I have a 300GB database on Oracle 8.17 and the full export takes about 9 hours. I am using the following command to do the export:
exp system/pwd@mydb full=yes file=mydb.dmp log=mydb.log
Are there any options for the export command that would allow to improve the performance and decrease the export time without any hardware upgrades?
Thanks.

Hi,
thanks for the reply.
It is saying:
In versions of SQL*Loader prior to 8.1.5, you could not use direct path export for tables containing objects and LOBs. If you tried to, they were exported using the conventional path method. This behavior has changed and you can now use direct path export for tables containing objects and LOBs.
If I have Oracle 8.17, does that mean, I have SQL*Loader of the same version? If not, how do I find what my version of SQL*Loader is?
Thanks.

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Oracle 10g performance is slow

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Do you have statistics gathered on the tables in the 8i database? Can you post the explain plan for the query in both databases?
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DR$WWV_FLOW_OH_IDX$I
DR$WWV_FLOW_OH_IDX$K
DR$WWV_FLOW_OH_IDX$N
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grant SELECT on SYS.V_$SESSION to Flows_020100;
grant SELECT on SYS.V_$PARAMETER to Flows_020100;
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grant SELECT on SYS.DBA_IND_COLUMNS to Flows_020100;
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grant SELECT on SYS.DBA_ROLLBACK_SEGS to Flows_020100;
grant SELECT on SYS.DBA_ROLE_PRIVS to Flows_020100;
grant SELECT on SYS.DBA_SYS_PRIVS to Flows_020100;
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ORA-31619: invalid dump file "D:\oracle-export\mitest-19-05-2009.dmp"

HI
I have took logical backup (export) on linux and import (windows 2003 server).
export command:
$expdp miqa/miqa schemas=miqa directory=backup_dir CONTENT=all dumpfile=miqa-`date +%d-%m-%Y`.dmp CONTENT=all logfile=miqa-`date +%d-%m-%Y`.log'
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GRANT READ, WRITE ON DIRECTORY backup_dir TO rnddb;
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Import: Release 10.1.0.2.0 - Production on Wednesday, 17 June, 2009 14:45
Copyright (c) 2003, Oracle. All rights reserved.
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tion
With the Partitioning, OLAP and Data Mining options
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ORA-31619:     invalid dump file "string"
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hi masters,
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Vikrant,
You should wait for some time buddy, its weekend ;-) .
this is not some kind of question, but a discussion. some statements come from our client that after weekly reboot of system, the oracle database performance is low for some time and increase after some time(say 2 days).i think it is but obvious, because at reboot oracle flushes all cache, and temporary space, so it need to re parse the sql statements and perform some disc I/O's so it might need some time and hence performance will degrade.
>
I would start from saying that checking the performance when the system just started, is a wrong approach. There would be lots of IOs , parsing, calculations(related to memory allocations) happening so there would be a delay/bad performance at that time. Very simple example can be parsing, another can be memory allocation. Oracle doesn't allocate the entire memory in the instance startup that is allocated to the memory areas but allocates just the bare minimum that is needed to start the instance and than after the startup, it keeps on allocating the memory. So surely enough, with the startup and after a while of it, there would be a different performance than that after the instance hsa already been started and the workload informations have started coming up.
Its correct that Oracle would deallocate all the caches with the reboot as the instance is on the memory(physical) and with the reboot , that would be flushed including the SGA which is allocated over it. Temporary tablespace is now not freed with the reboot. I guess its a rather illogical thing to do but that's what is there now. Oracle keeps the segment allocated even after the reboot is issued, hence the reason for larger temporary tablespaces.
>
but at the same time some people claim that after reboot their database performance is better than their normal performance for some days. it seems controversial that's why i am posting it here.
what might be the reason behind this?? prior can have a valid reason of hard parsing, but what with second case??
>
This should not come as a surprise once we understand what might be happening with this process. Assume a situation where you have undersized caches. For example, shared pool . which is very heavily used for database , if this is going to be undersized and you are not using automatic memory management, you won't be enjoying the dynamic management of this parameter. Now, if you do lots of parsing , thanks to your wrongly written queries, you would eventually end up filling up shared pool to its max thus leaving no space for incoming new hard parsed cursors. Here , if you can't manage to add more memory to add to it, the only solution left would be to flush the shared pool( as good as rebooting the db because this would do the same) and than make space for the new cursors. The performance is going to be better becausethe cursors would not be getting flushed out immediately and will be kept in the shared pool as long as its not filled up again.Once you have reached to limit of it, again there would be performance benefit. So there are always odds added to the statements like this that I rebuilt my index , I got better, I rebooted my server, my querie are much faster now. Most of the time when these kind of statements are given, they are based on what we have seen, without understading what actually might have happened. So I would siggest to hear the statement but not take them as a rule of thumb to follow.
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ORACLE 버젼 간 EXPORT/IMPORT 상호 호환성 참조표

제품 : ORACLE SERVER
작성날짜 : 2002-10-08
ORACLE 버젼 간 EXPORT/IMPORT 상호 호환성 참조표
===============================================
버젼이 상이한 데이타베이스간의 export/import 작업은 작업 수행시 반드시 상호
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오류와 함께 작업이 실패하게 된다.
다음은 V8.0 미만의 버젼으로 import하고자 할 때 사용될 export 도구의 버젼
정보이고,
---------------------------------------------+
| EXPORT | IMPORT to |
| from --------------------------------+
| | 7.0.x | 7.1.x | 7.2.x | 7.3.x |
| 7.0.x | EXP70x | EXP70x | EXP70x | EXP70x |
| 7.1.x | EXP70x | EXP71x | EXP71x | EXP71x |
| 7.2.x | EXP70x | EXP71x | EXP72x | EXP72x |
| 7.3.x | EXP70x | EXP71x | EXP72x | EXP73x |
| 8.0.x 주1| EXP70x | EXP71x | EXP72x | EXP73x |
| 8.1.x 주1| EXP70x | EXP71x | EXP72x | EXP73x |
다음은 V8.0 이상의 버젼으로 import하고자 할 때 사용될 export 도구의 버젼
정보이다.
----------------------------------------------------------------------+
| EXPORT | IMPORT to |
| from --------------------------------------------------------
| | 8.0.3 | 8.0.4 | 8.0.5 | 8.0.6 | 8.1.5 | 8.1.6 | 8.1.7 |
----------------------------------------------------------------+
| 7.x 주2| EXP7x | EXP7x | EXP7x | EXP7x | EXP7x | EXP7x | EXP7x |
----------------------------------------------------------------+
| 8.0.3 | EXP803 | EXP803 | EXP803 | EXP803 | EXP803 | EXP803 | EXP803 |
| 8.0.4 | EXP803 | EXP804 | EXP804 | EXP804 | EXP804 | EXP804 | EXP804 |
| 8.0.5 | EXP803 | EXP804 | EXP805 | EXP805 | EXP805 | EXP805 | EXP805 |
| 8.0.6 | EXP803 | EXP804 | EXP805 | EXP806 | EXP806 | EXP806 | EXP806 |
----------------------------------------------------------------+
| 8.1.5 | EXP803 | EXP804 | EXP805 | EXP806 | EXP815 | EXP815 | EXP815 |
| 8.1.6 | EXP803 | EXP804 | EXP805 | EXP806 | EXP815 | EXP816 | EXP816 |
| 8.1.7 | EXP803 | EXP804 | EXP805 | EXP806 | EXP815 | EXP816 | EXP817 |
----------------------------------------------------------------+
* 주의 사항 *
주1.Oracle8이나 Oracle8i 데이타베이스를 Oracle7 데이타베이스로 import하고자
하는 경우에는, import 수행 전 반드시 Oracle8이나 Oracle8i 데이타베이스를
대상으로 SYS 사용자로 CATEXP7.SQL 스크립트를 수행하여야 함.
주2.Oracle7 export dump 화일을 Oracle8이나 Oracle8i 데이타베이스로 import
하는 경우에는 DATE 타입의 컬럼에 지정되어 있는 제약조건이 invalid 상태로
변함.
기타 주의사항으로는,
1. 상위 버젼의 데이타베이스에 대해 exp 명령을 사용할 경우에는 반드시 tns
alias를 이용한 SQL*Net 접속이 필요하며,
2. DIRECT path export 방식은 지원하지 않으므로, CONVENTIONAL path 방법만을
사용하여야 한다.
현재 운영중인 데이타베이스가 유지하고 있는 export와 import 관련 뷰의 버젼을
확인하기 위해서는 다음 명령어를 이용할 수 있고, 값에 해당하는 버젼 번호는
아래 표와 같다.
SQL> SELECT * FROM sys.props$ WHERE name LIKE 'EXPORT%';
NAME VALUE$ COMMENT$
EXPORT_VIEWS_VERSION 8 Export views revision #
| EXPORT_VIEWS_VERSION |
------------------------------+
| Value | Introduced in Release |
------------------------------+
| 1 | 7.1.3 |
| 2 | 7.2.1 |
| 3 | 7.2.3 |
| 4 | 8.0.1 |
| 5 | 8.0.2 |
| 6 | 8.0.3 |
| 7 | 8.0.4 |
| 8 | 8.1.6 |
------------------------------+

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Edited by: Neela on Feb 17, 2009 11:47 PM

Set the system configuration.
Windows XP 2003 SP2
Database : oracle / sql
Installl : Oracle EPM Suite the following components:
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regards,
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