Slow Import For Oracle 11g R3 On IBM AIX 6.1
Sep 3, 2012
I am migrating a oracle 9i database to 11g r3. I can only use imp. As the database is huge, I have split the exp dump by schemas. In my recent test, i have split the schema into 4 seperate threads to be imported into the new oracle11g database. The 4 thread of imp consist of almost similar sizes of schema (Eg thread 1 - Schema 1, 2 ,3. Thread 2 - Schema 4,5,6 etc)
All the dump files are in the same mount point. When i execute the import (4 threads) together, the total import timing is each thread is between 2.5 days to 3.5 days.
Then i proceed to try only 1 thread, only 2 hrs. So could this be a IO issue or oracle memory problem?
Specs
IBM AIX 6.1, 32GB RAM
Oracle
24GB AMM
Number of processes 500
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Feb 20, 2011
I am working on an SAP application migration project using Oracle 10.2.0.2 database. We are migrating the application from Windows to Solaris.
During the process we are facing problem with very slow insert operation on a particular table.The server's capacity is very good and so no resource bottleneck.
The table contains around 2,70,000 rows and inserting at around 100 rows per 10 seconds.
The table contains following data types.
SQL> desc SAPDATDB.CAF_GP_VALDEF;
Name Null? Type
----------------------------------------- -------- ----------------------------
VAL_UUID NOT NULL NVARCHAR2(34)
VAL_GUID NOT NULL NUMBER(10)
VAL_CLOB NCLOB
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Jul 4, 2011
Few days ago, My database server no access to StorageBox then I reboot it then after works fine. But, know DB import process is too slow. Before 100GB DB import process completed within 10 hours when server normal running. Now 2 day working, but not complete
How to investigate this issue? Maybe I miss increase some parameters on the Server or Oracle?
Here is my server brief info:
RAM is 16GB,
SWAP size is 16GB,
CPU 12 cores
SQL> show sga;
Total System Global Area 4294967296 bytes
Fixed Size 1984144 bytes
Variable Size 369105264 bytes
Database Buffers 3909091328 bytes
Redo Buffers 14786560 bytes
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May 30, 2013
I've been using datapump for a long time now but I have not come across this problem before.
Importing just two tables: Table1 data=100Mb=11 million rows
Table2 data=4.2Gb =19.6 million rows
Table1 ran for approx. 5 hours
Table2 ran for approx. 15 hours
If I run the impdp importing both tables in the same par file the default tablespace of the users the import is running as runs out of space due to ORA-01691: unable to extend lob segment <owner>.SYS_LOG0001175799C00045$$ by 512 in tablespace USERS. I do not understand why it is creating objects in order to import tables into someone elses schema.
The environment is Red Hat LINUX 4.1.2-51 running Oracle 11.2.0.1 of Oracle11gR2. This is a 9 node RAC using ASM.
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Nov 23, 2012
I had just successfully finished a full importing from Oracle 9i DB to Oracle 11gR2 DB. My export was a full db export.
Prior to this importing, my 11g was a newly created DB with the default SYS, System etc.. schema. Their passwords is different from those in 9i.
However, i realised that after importing... their passwords in 11g was replaced by those passwords in 9i, including SYS and SYSTEM user...
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Dec 31, 2011
We are using one software it is a test tool for verify the data base posting speed from server to client systems. In windows 2008 R2, database posting speed is very slow when compare to windows 2003 server .
Server configuration is same for both servers ( RAID 5 , RAM 4 GB) how we can improve writing performance in Oracle
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Oct 11, 2012
We have a function that is called in various other PL/SQL packages, and performance has always been very good. On 29th Sept we upgraded our db to 10.2.0.5.0 and since then, a package that calls the function has gone from ~4mins, to ~2.5hrs to run.
In PL/SQL Developer, a simple select that calls the function has gone from ~0.5secs to retrieve the first 100 rows, to ~12secs. I ran a profile of the main package, which highlighted the where the bottleneck was (a fetch from an explicit cursor). Running an explain plan on the cursor SQL doesn't really show up anything untoward.
However, I found that if I subtly changed the cursor SQL, (so that it did the same thing, but was written differently), it fixed the performance problems.
where ade_start_date between cpDate-cpDays and cpDate-1
/*and ade_start_date < cpDate
and ade_start_date >= (cpDate-cpDays)*/
From this, we thought that there may have been a bad cached execution plan which the change of code forced a recalculation of. However, about 2 hours later, the changed code ran slowly again. So a further subtle change was made, which fixed the issue again. Until this morning, when it was running slowly again.
This feels like it is CBO/stats related potentially, but is out of my area of knowledge unfortunately. We have our DBA investigating this, but there may be things I can test to narrow down the possibilities in the meantime.
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Dec 7, 2012
I have big trouble with some Update query on Oracle 11G.I have a set of tables (5) of identical structures and a view that consists in an UNION ALL of the 5 tables.None of this table contains more than 20 000 rows.Let's call the view V_INTE_NE. Each of the basic table has a PRIMARY KEY defined on 3 NUMBERS(10,0) -> INTE_REF / NE_REF / INSTANCE.
Now, I get 6 rows in another table and I want to update my view from the data of this small table (let's call it SMALL). This table has the 3 columns INTE_REF / NE_REF / INSTANCE.
When I try to join the two tables :
SELECT * FROM T_INTE_NE T2
WHERE EXISTS ( SELECT 1 FROM SMALL T1 WHERE T2.INTE_REF = T1.INTEREF AND T2.NE_REF = T1.NEREF AND T2.INTE_INST = T1.INSTANCE )
I get the 6 lines in 0.037 seconds
When I try to update the view (I have an INSTEAD OF trigger that does nothing (just return for testing even without modifying anything), I execute the following query :
UPDATE T_INTE_NE T2
SET INTE_STATE = -11 WHERE
EXISTS ( SELECT 1 FROM SMALL T1 WHERE T2.INTE_REF = T1.INTEREF AND T2.NE_REF = T1.NEREF AND T2.INTE_INST = T1.INSTANCE )
The 6 rows are updated (at least TRIGGER is called) in 20 seconds.
However, in the execution plan, I can't see where Oracle takes time to achieve the query :
Plan hash value: 907176690
[code]....
Predicate Information (identified by operation id):
2 - access("T2"."INTE_REF"="T1"."INTEREF" AND "T2"."NE_REF"="T1"."NEREF" AND
"T2"."INTE_INST"="T1"."INSTANCE")
Note- dynamic sampling used for this statement (level=2)
Statistics
-----------------------------------------------------------
3 user calls
0 physical read total bytes
0 physical write total bytes
0 spare statistic 3
0 commit cleanout failures: cannot pin
[code]....
I get exactly the same execution plan (when autotrace is ON).Furthermore, if I try to do the same update on each of the basic tables, I get the rows updated instantaneously.
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Jan 29, 2013
I'm using PreparedStatement to execute a query with some parameters. in sql developer, it just spends 12 seconds but in jdbc, it's around 140 seconds.
I disabled "_optim_peek_user_binds" parameter already but it didn't work. alter session set "_optim_peek_user_binds"=false;
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Jan 7, 2013
I have new machine with oracle 11g and i have exported dump from oracle 10g . Now i need to import that dump on oracle 11g.
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May 25, 2013
I am using 11gR2 on windows server. This is the query that runs many times a day and effect badly the performance of database. I don't have much idea about this query.
SELECT TO_CHAR(current_timestamp AT TIME ZONE 'GMT', 'YYYY-MM-DD HH24:MI:SS TZD') AS curr_timestamp, COUNT(username) AS failed_count
FROM sys.dba_audit_session
WHERE returncode != 0 AND TO_CHAR(timestamp, 'YYYY-MM-DD HH24:MI:SS') >= TO_CHAR(current_timestamp - TO_DSINTERVAL('0 0:30:00'), 'YYYY-MM-DD HH24:MI:SS')
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Jun 18, 2012
I have an Oracle database (9.2.0.7) installed on a HP-UX server.When trying to access this database from another HP-UX or Linux server, connection is fine. But when trying to connect from a Windows based client, connection is very slow (almost 1 minute to return the result of a 'select count(*)' like query, which is immediate from the Linux client).
Here are some facts I can add :
- Clients and servers are on the same network segment (it is not a network matter)
- No matter which client version I use, there no difference
- I tried to know what happens on the Oracle server when performing my sample query using tusc command : the result is that the server is performing exactly the same actions when sending my query from a Linux client or a Windows client
- The only relevant difference seems to be the client OS
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Nov 9, 2012
could not import using impdp. it hangs while processing view.
Oracle version : Oracle Database 11g Release 11.2.0.1.0 - 64bit Production
expdp user/pwd full=y directory=export dumpfile=exp_test.dmp
There is no error in export log.
impdp user/pwd directory=data_pump_dir dumpfile=exp_test.dmp logfile=imp_test.log table_exists_action=replace
*** 2012-11-09 10:23:27.799
A deadlock among DDL and parse locks is detected.This deadlock is usually due to user errors in the design of an application or from issuing a set of concurrent statements which can cause a deadlock. This should not be reported to Oracle Support. The following information may aid in finding the errors which cause the deadlock:
ORA-04020: deadlock detected while trying to lock object MV_LOTS
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Jun 22, 2012
MY DB Version: 10.2.o
OS: Windows Server 2003
I am trying to import on table which i have the export dump file which i take using expdp previously when i load that table on the same host
by using below command:
expdp scott/tiger@db10g tables=EMP,DEPT directory=TEST_DIR dumpfile=EMP_DEPT.dmp logfile=expdpEMP_DEPT.log
after that i zip that dump and move it to external usb and now i need that table i copy that table and unzip that that dump
Command i am using to do the import is :
impdp scott/tiger@db10g tables=EMP,DEPT directory=TEST_DIR dumpfile=EMP_DEPT.dmp logfile=impdpEMP_DEPT.log
But the query of import is still runing even not showing any amount of rows to be imported.
i already make the tablespace in which the table was previosuly before dropping but when i check the sapce of tablespace that is also not consuming one error i got preiviously while performing this task is:
Connected to: Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - Production
With the Partitioning, OLAP and Data Mining options
Master table "CDR"."SYS_IMPORT_TABLE_03" successfully loaded/unloaded
Starting "CDR"."SYS_IMPORT_TABLE_03": cdr/********@tsiindia directory=TEST_DIR dumpfile=CAT_IN_DATA_042012.DMP tables=CAT_IN_DATA_042012 logfile=impdpCAT_IN_DATA_042012.log
[code]....
i check streams_pool_size it will show zero and then i make it to 48M and after that
SQL> show parameter streams_pool_size;
NAME TYPE VALUE
-----------
streams_pool_size big integer 48M
But still it takes time
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Sep 29, 2012
My database version
SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - ProductionOS version:
Windows 7 64bit I have schema(scott) export with schema level option and imported with different name as (scott1).At regular period of time i need to import the scott to scott1 without affecting existing records.such as
*1. Need to append new created records.*
*2. Need to append updated records.*
for the above requirement I did in the following way
expdp xxxx/******** schemas=SCOTT directory=dumpdir dumpfile=SCOTT_28-SEP-2012.dmp logfile=exp_SCOTT_28-SEP-2012.log imported in the following way impdp xxxx/******** AS SYSDBA REMAP_SCHEMA=SCOTT:SCOTT1 directory=DUMPDIR dumpfile=SCOTT_28-SEP-2012.dmp logfile=imp_SCOTT2_28-09-2012.log TRANSFORM=SEGMENT_ATTRIBUTES:n TABLE_EXISTS_ACTION=APPEND.
The problem is i couldn'table to append the records to existing tables the log error show such ways.
ORA-31684: Object type USER:"SCOTT1" already exists
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
[code].....
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May 10, 2013
I am trying to run impdp over network to import tables only but i am getting an error saying not able to create metadata and the import fails
Here are the steps below,
1. Source database created a user and granted select on certain tables to the user.
2. Created a user in the Target database.
3. Created a public link as sys user in the target database.
4. granted imp and exp full database to both users and all the other privs.
5. Started the impdp from the target server.
The import fails with
$impdp abc/xyz directory=DATA_PUMP_DIR network_link=TESTAR logfile=net_import_proddev.log TABLES=impdb.abc parallel=12 REMAP_SCHEMA=IMPDB:ABC
Import: Release 11.2.0.3.0 - Production on Tue Apr 23 13:10:51 2013
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "IMPDB"."SYS_IMPORT_TABLE_01": abc/******** directory=DATA_PUMP_DIR network_link=TESTAR logfile=net_import_proddev.log TABLES=impdb.abc parallel=12 REMAP_SCHEMA=IMPDB:ABC
[code]....
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Jul 9, 2013
aix 6.111.2.0.3 I have an expdp dump from prod to be imported to our test database.I have imported it using impdp, but to my surprise the tables were imported but lots of indexes were not created? even If I have used TRANSFORM=SEGMENT_ATTRIBUTES:N just to use the default USERS tablespace. How do I import the indexes separately, skipping the tables and other objects?
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Jul 2, 2012
How to import data from excel(.xls) file to data base table
I have excel sheet(.xls) data details, I neet to upload details to data base table using procedure
excel sheet is not CSV file, so SQL Loader is not using
any alternative solution for this issue
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May 24, 2013
I want to import data in a csv file by SQL Loader.
but , I don't want to import some illegal rows when the column 'name' is null
how can I modify the SQL Loader ctrl file?
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Sep 17, 2012
I try to transfer data from one database to another one through data pump via SQL Developer (data amount is quite important) exporting several tables. Tables export is doing fine, but I encounter the following error when I import the file (I try data only and data + DDL).
"Exception: ORA-39001: argument value invalid dbms_datapump.get_status(64...=
ORA-39001: argument value invalid
ORA-39000: ....
ORA-31619: ...
The file is in the right place, data pump folder of the new database. User is the same on both base, database version are similar.
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Dec 22, 2012
I am trying to migrate a table to a new table that has the field sequence changed and also has a new field added. My main question is if it is possible to have datapump add values to the new field in the target table.For example:
-original table has fields a, b, d, c
-new table has fields b, c, d, a, e
I want to load the new table and also include adding values for field e. In this case, field e is a year field, so it should be loaded with '2012'..Does datapump have the ability to do this? Is reorganizing the fields going to cause me any problems? We are on oracle version 11.2.0.3
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Feb 15, 2013
When I do the import the of succeeding dump, I drop the existing schema "SQL> drop user username cascade;" and import dump by " impdp system .... ". I would like to import a dump to an existing instance but only data import and will leave the current packages and other metadata untouched and unchanged on the said existing instance.
1. Do i need to drop user before the import if my requirements are the above?
2. If i need to drop user, what should be script.
3. For the import itself, what parameter should i use?
4. What are the necessaries I need to consider before doing the import.
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Dec 12, 2012
version:11.2.0.3
Platform : RHEL 5.4
Imagine you have 100 schemas backed up (expdp) in a dumpfile and you want to import just one schema from that dumpfile in a DB. You can specify just that one schema you want using SCHEMAS parameter in the impdp. But things are not straightforward when you want use REMAP_SCHEMA.
Here is my scenario:
===================
I took the expdp dump of schemas A and B in one go. So, dumpfile has objects from both A and B.The dumpfile name is : schemas_AandB.dmpNow , I want to create schema C from A using REMAP_SCHEMA parameter
-- Putting each parameter in a separate line for readability
impdp PSTREF/PSTREF_123
DIRECTORY=ADET_EFX_DIR
DUMPFILE=schemas_AandB.dmp
LOGFILE=CreatingCfromA-Impdp.log
REMAP_SCHEMA=A:CEverything goes fine. Schema C is created from Schema A in the dumpfile.
But impdp is trying to create schema B as well because schema B was present in the dumpfile. Since the schema B and its objects are already in the DB , I get the following errors.
ORA-31684: Object type USER:"B" already exists
ORA-31684: Object type PROCEDURE:"B"."SP_CLEAREXPIREDSESSIONDATA" already exists
ORA-31684: Object type PROCEDURE:"B"."SP_DELETESESSIONDATA" already exists
ORA-31684: Object type PROCEDURE:"B"."SP_DELETESTATECONTEXTINFO" already exists
[code]...
Trying to avoid schema B in the dumpfile from being imported by specifying SCHEMASBut I got the following error
ORA-39065: unexpected master process exception in MAIN
ORA-12801: error signaled in parallel query server PZ99, instance oracth214:HEWRAC1 (1)
ORA-01460: unimplemented or unreasonable conversion requestedMaybe REMAP_SCHEMA and SCHEMAS parameters won't work together.
Is there any way to prevent the impdp from importing user B and its objects ?
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Dec 10, 2012
The source server (9.2) is /oracle/data/xxx the destination will be /u02/oradata/xxx how do I get the imp to change the paths.
I know you can't do db_file_name_convert, as that only works in dataguard with rman, and it looks like you can only set compatible down to 10.2, it's a very small DB, (5Mb) but it's a live license server DB, I need it intact.
I tried a straight import, but that just barfed with "IMP-00015: following statement failed because the object already exists:" on every statement.
EDIT: it's lying, the /oracle path doesn't exist, just FYI.
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Apr 24, 2009
I am trying to export and import tables from oracle...For this i am using imp exp utility...But this is being carried out from cmd prompt...IS there any way by which i can execute these from sql prompt..So that by establishing jdbc connection thgh java code...i cud run the code...
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Jul 3, 2010
I created new 10g database & trying to import the export of 9i database (ABC). i have below questions:
-I just installed 10g have only system,sys ..etc only default user & databases.Do i need to create a same database i have in 9i (ABC) in 10g before importing data?
-i tried to import the export of 9i (ABC database , for only XYZ user) in 10g system user , i got the table imported with 0 rows
Log:
+++++++++++++++++++++++++
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:V09.02.00 via conventional path
Warning: the objects were exported by P2KTEST, not by you
import done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character set
. importing P2KTEST's objects into P2KTEST
. . importing table "TESTRATN" 0 rows imported
Import terminated successfully without warnings.
++++++++++++++++++++++
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Jun 25, 2012
how excel data import into oracle
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Nov 12, 2012
How to import *.dmp file Through Oracle SQL Developer (3.2.20.09) ? How to do it ?
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Mar 14, 2012
my problem is that whenever i want to import a dump file(oracle 10g) oracle just import 4 tables and then goes into hang state(not responding) i'm using old import method (not datapump).
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