Server Utilities :: Importing From 9i To 11g With Compressed Extents Creating Extents On Target
Nov 2, 2010
We are migrating from a 9i db to 11g and we've been testing our apps on a similar (but not exact) machine as our production box.
Normally when we take a full export of the production data (on 9i) and import it into another 9i DB, the tables and indexes are created with the initial size large enough to hold the entire table. We also do our export with the compress extents param set to 'Y'.
However, we've noticed that when we import our data into the 11g DB, that tables are being created with multiple extents...sometimes up to 10 or 15. This seems to happen even with tables that don't even have extents on db that the export was taken from.
There ARE some differences in our 11g DB that i imagine might be the culprit, i've just been unable to narrow one of them down.
the differences i know of are:
a) the target DB has locally managed tablespaces while the source 9i DB had dictionary managed tablespaces
b) the block size is larger on the target 11g DB. 8192 vs 2048
c) the nchar character set on the source DB is AL16UTF16 and the target is UTF8 (we actually only have an nchar column in one of our tables...and also, the UTF8 setting was actually a mistake that we're correcting this weekend with a fresh DB and fresh import)
What would cause the import to produce all these extra tablespaces?
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Aug 30, 2011
create a procedure or cursor to allocate extents to all tables with zero rows for all the user in the database.I have used the below query to check table with zero rows and no extents allocated.
select onwer,table_name,initial_extent
from dba_tables where initial_extent is null order by owner;
I generated the query to allocate extents by using concatenation in the above query.
select 'ALTER TABLE '||table_name|| ' ALLOCATE EXTENT; '
from dba_tables where initial_extent is null order by owner;
now I want the extent allocation for such table auutomatically for aal the tables with zero rows.
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Feb 6, 2013
When we are using pga_aggregate_target and sort area is automatically managed by Oracle. Why oracle is not allowing for auto allocating extents in TEMP and still extents of uniform size of 1 MB is used.
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Apr 29, 2012
which data dictionary view would you query to see the free extents in a tablespace.
i use dba_free_space;
SQL> select tablespace_name,sum(bytes),sum(blocks) from dba_free_space where
tablespace_name = 'SYSTEM' GROUP BY TABLESPACE_NAME;
TABLESPACE_NAME SUM(BYTES) SUM(BLOCKS)
------------------------------ ---------- -----------
SYSTEM 9830400 1200
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Nov 2, 2010
settings I can make for Initial and Next extents? I am working at a client site where they have an in-house E-Business Suite database that is running very fast. In most cases the initial extent on the big tables is set to something like 64Mb with the next extent set to figures varying between 25Mb and 50Mb. What this means is that we don't have many extents.
They have recently outsourced their database to Oracle on Demand and are getting poor performance. Over at OOD the initial extents remain as set in the local database - taken from a clone. However, all of the next extents are set small to nimbers like 128Kb. Some of the big Oracle EBS tables have more than 128Kb in a single record and we are seeing many 1000s of extents already.
Could the large number of extents and the small size of the next extent be the cause of a substantial decrese in performance? I'm looking for some justification to go back to OOD with a view to asking them to reinstate the settings as they were in the client database before it was migrated.
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Feb 15, 2013
we have some dictionary managed tablespaces and some tables in that.
we are getting some ticket for that like, one of the table is not able to extend it's next extent.
When i checked in alert log now luck.
Do we have any query to find which table that is. and how we can find what are the maximum extents, and currently how many extents it has used.
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May 12, 2011
I am looking to create a DDL-only clone of a 2TB database. The purpose of this clone is to provide developers a preprod-like environment where they can test the syntax of their code changes before deploying to production. The database will reside on a seperate, small server.
As I only need the structure of the objects and not the data, my first port of call was EXP using rows=n. However, when I IMP to an indexfile I see that the initial extents have been defined on the tables (in some cases 1GB!). As stated my clone environment is small, so I would be looking to have these set at 1mb. how I can achieve this? I will want to be able to automate the cloning of the database as much as possible. Perhaps there's some other way other than EXP/IMP?
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Jul 13, 2010
I need to export one schema which contains of huge space of 100GB in oracle 9i ,can u pls provide the command to export in the compress mode.
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Jun 22, 2011
how can i import the oracle 9i dump file into 10g database, while iporting i get following error imp-00002 fail to open dump file
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Nov 9, 2010
I would like to know if a dump file taken from 10G could be imported into to an Oracle 8I database.
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May 31, 2012
I want to import my oracle 9i dump file into oracle 10g version. What should i do ???
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Sep 15, 2010
I have exported data of one user an importing into another schema at another server. when i am trying to imoport it is working fine for quite no of imports into tables, but after some time it starts giving me below mention error...
IMP-00008: unrecognized statement in the export file:
<
IMP-00008: unrecognized statement in the export file:
<
IMP-00008: unrecognized statement in the export file:
<ے
IMP-00008: unrecognized statement in the export file:
+A
IMP-00008: unrecognized statement in the export file:
[code]...
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Sep 16, 2011
I have a rather complicated process to import text files into my DB.I'm given thousands of files every day, separated by "," and with 80 fields each. With a bash script, I take the 45 fields I need and then split each file into x number of files grouping the rows by three fields.Then I use SQL Loader to insert them into de DB.
The problem is that now I must insert on two tables and the "WHEN" clause doesn't allow the use of > and <.
To make things a litle clearer take this text file (already splited and grouped and ready to be inserted):
...
1,1,135,1900,0,12,114,2011/08/25 17:19:00,135,...
1,1,135,1900,0,13,119,2011/08/25 17:19:00,136,...
1,1,135,1900,0,14,117,2011/08/25 17:19:00,137,...
1,1,135,1900,0,15,113,2011/08/25 17:19:00,138,...
1,1,135,1900,0,16,119,2011/08/25 17:19:00,139,...
...
When field 6 is higher or equal to 14, it must go to table a.When field 6 is lower than 14, it must go to table b.I can't use external tables as I'm in a different server.
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Jun 9, 2011
I have oracle 10.2.0.4.0 installed on Window server 2008 [Machine A] and oracle 10.2.0.1.0 on windowx xp [Machine b]. Now I have taken the export of database on windows server 2k8 [Machine a] by puting the entry in the tnsname.ora file of Windox XP [Machine b].
Now when I am importing on the same machine I am getting the below mentioned error:
C:Documents and Settingsdsharma>IMP FROMUSER=SYSTEM TOUSER=ESCDBO FILE='D:sharevcc53_0106.dmp' LOG='D:sharevcc53_0106_IMP.LOG' ignore=y
Import: Release 10.2.0.1.0 - Production on Thu Jun 9 20:08:11 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Username: system
Password:
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production..With the Partitioning, OLAP and Data Mining options
Export file created by EXPORT:V10.02.01 via conventional path
import done in WE8MSWIN1252 character set and UTF8 NCHAR character set
import server uses AL32UTF8 character set (possible charset conversion)
export client uses US7ASCII character set (possible charset conversion)
Import terminated successfully without warnings.
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Oct 20, 2011
Source:Oracle 11g 11.1.0.2 32 bit on Windows 2003,Destination: Oracle 11g 11.1.0.2 64 bit on Windows 2008
In our Source Database, we are using following to create full export
Source database_name=dbfour,sid=dbfour1
I am creating full export by using following
expdp system/psswd full=y dumpfile=expdp_%date:~0,2%-%date:~3,2%-%date:~6,4%.dmp logfile=explog_%date:~0,2%-%date:~3,2%-%date:~6,4%.log FLASHBACK_TIME="to_timestamp(to_char(sysdate,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')"
In my destination DB with database_name=dbfive and sid=dbfive1, i am trying to import whole database by using the file created above and use following
impdp system/pwd@dbfive DIRECTORY=DATA_PUMP_DIR DUMPFILE=EXPDP_20-10-2011.DMP
Process started but after sometime it gave 1200 errors. Is it due to the Different Database name or Is it because i did not create table space in destination database.
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Sep 20, 2010
Two different says in different documentation as below.
1) Import required same tablespace to fit the objects, otherwise it throws error.
2) Import by default uses the default tablespace to fit the objects, but some times it uses SYSTEM tablespace also.
confirm with the correct one.
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Aug 14, 2012
I am getting following errors while importing data.
SCHEMA_EXPORT/TABLE/INDEX/DOMAIN_INDEX/INDEX
ORA-39083: Object type INDEX failed to create with error:
ORA-06550: line 2, column 1:
PLS-00201: identifier 'CTXSYS.DRIIMP' must be declared
ORA-06550: line 2, column 1:
[code]......
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Jan 27, 2011
For importing higher version database exp dump e.g. 10g exp dump into 9i database it is suggested at many places "Always use a version of the EXPORT utility that is equal to the lowest version of either the source or the target database"
I understand from this is, I will be using 9i exp utility for exporting 10g database
I would like to know the ways it can be achieved.
1) Installing oracle 9i client on 10g database Do I still need to execute 9i catexp.sql after that? If answer to above is 'yes', I assume catexp.sql of 9i wont be created after 9i client is installed as such I will need to copy it from 9i database server and execute on 10g database server. Correct? For above question I have assumed catexp.sql has different contents for 9i and 10g
2) After configuring tns file in 9i database, can I use?
exp user/password@10gdbconnstring ....
(of course for small amount of data)
Is there any other option for achieving the same?
Also I understand export and import between any 9.* into any 9.* wont be issue e.g. import from 9.2 into 9.1 Similarly any 10.* to another 10.* wont be issue.
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Mar 2, 2010
i m having full export .dmp file taken from oracle 10.2.0.1 Enterprise Edition.
i need to reinstall 10.2.0.1 standard edition and want to create database using the dump file which is taken from the Enterprise edition.
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Sep 19, 2010
I have 2 users (scott and Krishnan).
Krishnan wants to import the table, which was exported by scott.
1) but we should not run the script file of CATALOG.SQL.
2) we can't give the rights of imp_full_database from outside.
Also how user Krishnan can import that table to another user's schema?
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Mar 7, 2011
I'm importing data from SQL Server to Oracle. I used BCP to export the data from SQL Server. Below is the 1st record of table trlc from the csv file.
trlc.CSV
11032|100|Wman| | |2008-02-08| |
Using SQL Loader to import into Oracle:
TRLC table in Oracle database:
est_no varchar2(10) default ' '
right_no number(4) default 0
maj_auth varchar2(15) default ' '
weight varchar2(10) default ' '
idm_ht varchar2(8) default ' '
c_date date
P_tkt varchar2(5) default ' '
sqlldr user/pwd@db02 control=trlc.ctl log=trlc.log
trlc.ctL:
load data
infile 'trlc.csv'
replace
into table trlc
fields TERMINATED BY '|'
TRAILING NULLCOLS
(est_no,right_no,maj_auth,weight,idm_ht,c_date,P_tkt)
The rows get inserted successfully. But the result sets are different, for example: When I do a select in SQL Server,'select len(weight) from trlc;' , I get the length as 0. But when I do a select in oracle database, I get the length as 1. Also, the result set varies for the query below:
select * from trlc where weight=' ';
(SQL Server returns 1 row but Oracle returns no rows)
Do I need to mention any conversion code for the weight field to accept ' ' value?
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Apr 22, 2013
i am trying to import full db export using datapump , i have too many errors for objects that is already exist . attached is the log file . thae steps i did so far
1- created the database .
2- imported the full db backup using
impdp system/xxxxxxx full=yes directory=datapump dumpfile=palbe_full_20130322.dp log=palbe_full_22042013.log
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Jun 29, 2010
I have received a dump, which i need to put on a newly created schema, there is a particular table with more then 4 million rows, and other tables have hardly few thousand rows.
I want to import it in a way where only 1000 rows get imported for this table and other tables do not get affected. Is there a way to do it?
Note: Tables in dump are more then 200.
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Sep 2, 2013
I am trying to export a partition of a table and import it to another database. I get the below error when I try to import.
ORA-14400: inserted partition key does not map to any partition
If I export the table(for that particular partition) and import the table(after dropping the table) in destination, the partitions and sub partitions are created without any problem.
The table is Range Partitioned and Sub partitioned in List. So I had to perform the below operation if I want to retain other data in the Destination table.
1. Drop the existing partition
2. Create the partition and sub partition, same as source
3. Execute imp
In fact I had to perform step#2, as if I split the partition also, the sub partition gets replicated in the new partition, which again throws the same error. Is there better way of managing the partitions and subpartition in destination with exp/imp utility, so that I need not perform step#1 and step#2 manually.
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Aug 5, 2010
while importing dump file into database,i received the following error.
imp -00033 table demo not found.
But i checked in dump file ,the table exist .
Below is the command i executed in unix box.
imp system/manager file=data.dmp log=data.log tables=DEMO feedback=100 buffer=1000 fromuser=TOM touser=maddy
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May 10, 2010
i take export of one table (export complet successfully without warnings) when i am going to import into prduction databae the data in the table no coming i past the table structure and import command and logfile for import.
import command
imp user/user@database file=C:Tempuserdrop_id10g _id_rac_ra_headertables.dmp log=C:Tempuserdrop_id10g _id_rac_ra_headertablesimp.log tables=t_id_rac_ra_header fromuser=user touser=user statistics=none ignore=yes
my table structure in production database is
CREATE TABLE t_id_rac_ra_header
(ra_company VARCHAR2(10) NOT NULL,
ra_key NUMBER NOT NULL,
ra_doc_type VARCHAR2(50) NOT NULL,
ra_doc_number VARCHAR2(25) NOT NULL,
ra_doc_date DATE DEFAULT SYSDATE NOT NULL,
ra_reserve_key NUMBER,
[code].....
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Oct 5, 2010
We are working on migrating from 9.2.0.4 to 11.2 and we've set up a test machine so that we could test the install and the import (as well as test additional 11g features that we want to begin using).
So we created the database and created all of the tablespaces beforehand.
Our import command is
$ORACLE_HOME/bin/imp system/manager FULL=Y BUFFER=140000 FILE=/dbexport/Lhtech.exp VOLSIZE=2000M GRANTS=Y INDEXES=Y COMMIT=Y IGNORE=Y
However, when we run the import, we get the errors like so:
Import: Release 11.2.0.1.0 - Production on Tue Oct 5 15:01:19 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export file created by EXPORT:V09.02.00 via conventional path
[code]....
First of all, the block size in our "newly" created tablespaces is 8192...and these are obviously trying to recreate the tablespaces with a block size of 2048.
1) Why is it not ignoring these create tablespace commands when those tablespaces already exist?
2) how in the world do we get around the block size issue? We've tried nearly everything we could find, but we've still not had any luck.
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Nov 1, 2012
While trying to import a schema using Data Dump, I am facing the following issue - UDI-00018 - Import utility version can not be more recent than the Data Dump server.Following is the version information of the source and target DB and the utilities :
Source DB server : 10.1.0.2.0
Export utility : 10.1.0.2.0
Import utility : 10.1.0.2.0
Target DB server : 10.1.0.2.0
Export utility : 10.2.0.1.0
Import utility : 10.2.0.1.0
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Aug 3, 2010
We can Import dump from higher database version to lower database version.
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Sep 24, 2010
I am considering all of the capabilities and benefits of using Data Pump for exporting and importing extremely large data files. Would like to know if importing to tape is possible? If so, would the data be accessible if needed later?
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