Table & Index Compression on 11g

Hi,
We are planning to upgrade oracle ( RAC ) from 10.2.0.4 to 11.2 and planning to turn on table and index compression. I would like to learn the pros & cons of turning compression on in a 6TB database. Any performance issues after table/index compression .
Thanks
Prince Jose

Hey Prince,
Just check out the below thread if it can give you some idea for the same...
Re: Index Compression in SAP - system/basis tables?

Similar Messages

Index Compression in SAP - system/basis tables?

Hi!
In thread Oracle comression in SAP environments the Oracle 10g feature index compression was discussed. We are now going to implement it also. SAP and Oracle say, this can be done for any index.
So we selected the biggest and the most frequently used indexes and analyzed them. We could save about 100GB disk space.
But here comes my question:
In the hitlist of our most frequently used and biggest Indexes there are also some basis table indexes.
A few samples:
BALHDR~0
BALHDR~1
BALHDR~2
BALHDR~3
BDCP~0
BDCP~1
BDCP~POS
BDCPS~0
BDCPS~1
CDCLS~0
CDHDR~0
D010INC~0
D010INC~1
D010TAB~0
D010TAB~1
DD01L~0
DD03L~5
DD07L~0
E071K~0
E071K~ULI
GVD_LATCHCHILDS~0
GVD_OBJECT_DEPEN~0
GVD_SEGSTAT~0
QRFCTRACE~0
QRFCTRACE~001
QRFCTRACE~002
REPOSRC~0
SCPRSVALS~0
SEOCOMPODF~0
SMSELKRIT~0
SRRELROLES~0
SRRELROLES~002
STXH~0
STXH~REF
STXL~0
SWW_CONT~0
TBTCS~1
TODIR~0
TRFCQOUT~5
USR02~0
UST04~0
VBDATA~0
VBMOD~0
WBCROSSGT~0
Is it really recommended to compress indexes of SAP Basis Tables also - especially in the area of Repository/Dictionary, t/qRFC and/or "Verbuchung" (VB...)?
Thanx for any hint and/or comment!
Regards,
Volker

Hi Volkar,
I have succesfully tested the oracle index compression on ECC5 environment for the following tables in a sandbox environment;
ppoix
pcl2
pcl4
In total I saved around 60GB in the tablespaces.
Before compression I started a payroll run to see what time this will take without compression.
After compression of the indexes I re-executed the payroll which took exactly the same time as without compression (2 hours). So no impact on performance.
Also did an update statistics in DB13 -> no impact
With brtools: force update of specific table -> no impact
So we are seriously thinking about to take this into production.
I have also looked at BI environment but concluded that there was nothing to gain.
Unfortunately our infocubes are well build meaning that the fact tables contains the actual data and the corresponding dimension tables only the surrogate IDu2019s (SIDu2019s).
Those dimension tables are actually very small (64k) and not suitable for index compression.
Next step will be some Workflow tables.
Fe:
SWW_CONT~0                   INDEX        PSAPFIN           26.583.040
SWPNODELOG~0                 INDEX        PSAPFIN           15.589.376
SWWLOGHIST~0                 INDEX        PSAPFIN           13.353.984
SWWLOGHIST~1                 INDEX        PSAPFIN            8.642.560
SWW_CONTOB~0                 INDEX        PSAPFIN            8.488.960
SWPSTEPLOG~0                 INDEX        PSAPFIN            6.808.576
SWW_CONTOB~A                 INDEX        PSAPFIN            6.707.200
SWWLOGHIST~2                 INDEX        PSAPFIN            6.507.520
SWW_WI2OBJ~Z01               INDEX        PSAPFIN            2.777.088
SWW_WI2OBJ~0                 INDEX        PSAPFIN            2.399.232
SWWWIHEAD~E                  INDEX        PSAPFIN            2.352.128
SWP_NODEWI~0                 INDEX        PSAPFIN            2.304.000
SWW_WI2OBJ~001               INDEX        PSAPFIN            2.289.664
SWWWIHEAD~A                  INDEX        PSAPFIN            2.144.256
SWPNODE~0                    INDEX        PSAPFIN            2.007.040
SWWWIRET~0                   INDEX        PSAPFIN            2.004.992
SWW_WI2OBJ~002               INDEX        PSAPFIN            1.907.712
If you would like to know, I can post the results on workflow tables (indexes) on ECC6 environment.
Please rewards some point if you like.
Regards,
Stephan van Loon

New tables & indexes created do not show up in dba_segments view

Dear all,
I have created 3 tables and some indexes, but these objects do not show up in dba_segments view. Is this a normal behaviour? Previously, with dictionary managed tablespace, I can specify the minimum extent to create, when the table/index is created. But I'm not sure how the locally managed tablespace work. Please do advice. Thank you very much in advance.
I'm using Oracle 11g R2 (11.2.0.1.0) for Microsoft Windows (x64), running on Windows 7.
For the purpose of reproducing this issue, I have created the tablespaces as follow:
CREATE TABLESPACE CUST_DATA
DATAFILE 'd:\app\asus\oradata\orcl11gr2\CUST_DATA01.DBF' SIZE 512K
AUTOEXTEND ON NEXT 256K MAXSIZE 2000K
EXTENT MANAGEMENT LOCAL UNIFORM SIZE 256K
SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE CUST_INDX
DATAFILE 'd:\app\asus\oradata\orcl11gr2\CUST_INDX.DBF' SIZE 256K
AUTOEXTEND ON NEXT 128K MAXSIZE 2000K
EXTENT MANAGEMENT LOCAL UNIFORM SIZE 128K
SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLE CUSTOMER_MASTER (CUST_ID VARCHAR2 (10),
CUST_NAME VARCHAR2 (30),
EMAIL VARCHAR2 (30),
DOB DATE,
ADD_TYPE CHAR (2) CONSTRAINT CK_ADD_TYPE CHECK (ADD_TYPE IN ('B1','B2','H1','H2')),
CRE_USER VARCHAR2 (5) DEFAULT USER,
CRE_TIME TIMESTAMP (3) DEFAULT SYSTIMESTAMP,
MOD_USER VARCHAR2 (5),
MOD_TIME TIMESTAMP (3),
CONSTRAINT PK_CUSTOMER_MASTER PRIMARY KEY (CUST_ID) USING INDEX TABLESPACE CUST_INDX)
TABLESPACE CUST_DATA;
SQL> SELECT TABLE_NAME, TABLESPACE_NAME
2 FROM USER_TABLES
3 WHERE TABLE_NAME LIKE 'CUST%';
TABLE_NAME TABLESPACE_NAME
CUSTOMER_MASTER CUST_DATA
SQL> SELECT INDEX_NAME, TABLESPACE_NAME
2 FROM USER_INDEXES
3 WHERE TABLE_NAME LIKE '%CUST%';
INDEX_NAME TABLESPACE_NAME
PK_CUSTOMER_MASTER CUST_INDX
SQL> SELECT SEGMENT_NAME, SEGMENT_TYPE, TABLESPACE_NAME, BYTES
2 FROM USER_SEGMENTS;
no rows selected

Prior to 11g, when you created a table or whatever, you automatically allocated one extent.
This is now no longer true and depends on a parameter I don't remember.
dba_segments is a summary of dba_extents.
Obviously, if there is no extent allocated, the table (view is defined with inner join) will not show up.
You could qualify this is as a bug and submit a SR to Oracle. But then the performance impact may be huge.
Sybrand Bakker
Senior Oracle DBA

Problem in setting Composite Instance Index in SOA 11G

In SOA 11G the setIndex() xpath function is not working . But It was working in 10G.
If I use this setIndex function in BPEL Java Embedding , in audit trails the function is executed. But If I see the result by querying the DEV_SOAINFRA.COMPOSITE_INSTANCE table INDEX1 column it is empty. No values is inserted into this INDEX columns.
Can anyone please give a solution to set the composite instance index in SOA 11G ?
Thanks in Advance

1. setIndex() Xpath function in SOA 11G is working .
2. syntax : setIndex(1,'anyValue');
3. To view the index value for the instance created , query "DEV_SOAINFRA.CI_INDEXES" table.
Edited by: saba on Dec 6, 2011 6:22 AM

Processing SCHEMA_EXPORT/TABLE/INDEX/DOMAIN_INDEX/INDEX

I tried to import my 20GB data into my database but it is pending/hanging almost 1 day at this line, which is
Processing SCHEMA_EXPORT/TABLE/INDEX/DOMAIN_INDEX/INDEX .
My db version is :Version 11.1.0.7.0
What could be the reason? Why it is waiting so long on this line? It is locking indexes?

Windows Server 2008 R2 Enterprise
impdp user/pass@DB exclude=statistics schemas=user dumpfile=a.dmp log=a.log
Import: Release 11.1.0.7.0 - 64bit Production on Friday, 10 August, 2012 17:04:03
Copyright (c) 2003, 2007, Oracle. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Master table "ODB"."SYS_IMPORT_FULL_01" successfully loaded/unloaded
Starting "ODB"."SYS_IMPORT_FULL_01": odb/********@TEST parallel=4 dumpfile=UAT_08082012.DMP
Processing object type SCHEMA_EXPORT/USER
ORA-31684: Object type USER:"ODB" 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/TABLESPACE_QUOTA
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/TYPE/TYPE_SPEC
Processing object type SCHEMA_EXPORT/DB_LINK
Processing object type SCHEMA_EXPORT/SEQUENCE/SEQUENCE
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
. . imported "ODB"."PN_INVENTORY_HISTORY" 218.6 MB 1302517 rows
SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/FUNCTIONAL_AND_BITMAP/INDEX_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/INDEX/DOMAIN_INDEX/INDEX
and waiting here since 1 day..
alert log file has some warnings like:
<txt>Warning: drop_queue_table: No evaluation for the queue table: ODB.ROS_IN_QUEUE_TABLE
</txt>
</msg>
<msg time='2012-08-11T00:29:21.710+03:00' org_id='oracle' comp_id='rdbms'
client_id='' type='UNKNOWN' level='16'
Thread 1 advanced to log sequence 91 (LGWR switch)
Current log# 1 seq# 91 mem# 0: D:\APP\TRAXADMIN\ORADATA\TEST\REDO01.LOG
Sat Aug 11 10:16:16 2012
Thread 1 advanced to log sequence 92 (LGWR switch)
Current log# 2 seq# 92 mem# 0: D:\APP\TRAXADMIN\ORADATA\TEST\REDO02.LOG
Sat Aug 11 10:16:40 2012
Thread 1 cannot allocate new log, sequence 93
Checkpoint not complete_
Current log# 2 seq# 92 mem# 0: D:\APP\TRAXADMIN\ORADATA\TEST\REDO02.LOG_
Thread 1 advanced to log sequence 93 (LGWR switch)_
Current log# 3 seq# 93 mem# 0: D:\APP\TRAXADMIN\ORADATA\TEST\REDO03.LOG_
Thread 1 cannot allocate new log, sequence 94_
Checkpoint not complete_
Current log# 3 seq# 93 mem# 0: D:\APP\TRAXADMIN\ORADATA\TEST\REDO03.LOG_
Thread 1 advanced to log sequence 94 (LGWR switch)_
Current log# 1 seq# 94 mem# 0: D:\APP\TRAXADMIN\ORADATA\TEST\REDO01.LOG_
Sat Aug 11 10:16:56 2012_
Thread 1 cannot allocate new log, sequence 95_
Checkpoint not complete_
Current log# 1 seq# 94 mem# 0: D:\APP\TRAXADMIN\ORADATA\TEST\REDO01.LOG
Thread 1 advanced to log sequence 95 (LGWR switch)
Current log# 2 seq# 95 mem# 0: D:\APP\TRAXADMIN\ORADATA\TEST\REDO02.LOG
<txt>Errors in file d:\app\traxadmin\diag\rdbms\test\test\trace\test_j003_6036.trc:
ORA-12012: error on auto execute of job 74639
ORA-20111: ORA-24010: QUEUE ODB.IFACE_AEX_IN_Q does not exist
ORA-06512: at "ODB.PKG_IFACE_QUEUE", line 80
ORA-24010: QUEUE ODB.IFACE_AEX_IN_Q does not exist
ORA-06512: at "ODB.PKG_IFACE_QUEUE", line 48
ORA-06512: at "ODB.PKG_AEX_INBOUND"
Edited by: user638937 on 11.Ağu.2012 00:27

Compression for oracle database and index compression during import of data

Hi All,
I have a query , in order to import into oracle database and also have compression and index compression , do we have some kind of load args for r3load and also do we have to change the tpl file ?

Hello guy,
I did this kind of compression within migration project before.
I performed index compress first and then export -> import with table compress.
One thing you should take care, delete nocompress flag from TARGET.SQL (created by program SMIGR_CREATE_DDL, program SMIGR_CREATE_DDL created pure non-compression objects for these considered non-standard tables). For table columns > 255, we should not delete this flag.
Regarding to the index compress in source system, please check the following notes:
Note 1464156 - Support for index compression in BRSPACE 7.20
Note 1109743 - Use of Index Key Compression for Oracle Databases
Note 682926 - Composite SAP note: Problems with "create/rebuild index"
Best Regards,
Ning Tong

Index compression in R3load system copy target db2 9.7

We are in the early stages in planning a unicode migration:
source
ECC 6 on db2 9.1
target
Unicode ECC 6 on db2 9.7.
OS a constant at AIX 5.3.
The default behavior of system copy (target db=DB6) is index creation before data load.
If I run systen copy specifying row comression, a compression dictionary is automatically created for suitable tables, but all indexes were created while the table was empty. The resulting Db2 9.7 database has compressed tables but NO indexes are compressed.
What is the current recommendation on index creation? Does a db2 9.7 target with row compession selected change the recommendation?
Should I be using a DDL mapping file (mapping large files to DDLDB6_LRG.TPL)?
The DDLDB6_LRG.TPL could be tweaked to create indexes after table load...
I would need to plan target LOG environment and temp space large enough for index creation of our largest tables...
I don't think the default log settings would suffice.
Ken Chamberlain

I was thinking of using a DDLMAP file to map large tables/indexes to DDLDB6_LRG.TPL, and edit this file from prikey: BEFORE_LOAD (and seckey: BEFORE_LOAD) to AFTER_LOAD. I can use the export to select out tables greater than a certain size into their own jobs. I can use the resulting job list to create said DDLMAP file. When indexes get created before the load, they never get the compress attribute. If they were created after the load they would inherit their base tables compress attribute, which by this time table compression presumably has been turned on if applicable.
But perhaps a better idea would be to add COMPRESS YES to the crepky and creind sections of the same file (and not change BEFORE_LOAD to AFTER_LOAD).
I'm assuming large tables have large indexes which would benifit from compression. This would also catch large tables (with large indexes) which don't compress well and don't get compressed. I'll ignore large tables with small indexes for now.
PS I resently installed Solution Manager 7.01 on linux db2 9.7 specifying row compression - no indexes get compressed but many tables do.
What do you think? Is this a better solution (for implementing index compression during a unicode migration)?
Ken

Need information/advice on dataware house compression on 11g

We have an initiative to compress our ever growing datawarehouse.
OS level is AIX, db version is 11gr1, and going to go to 11gr2.
We would like to know where I can get a link regarding what is best to apply regrading compression in datawarehouse db.
I tried oracle documentation, and not sure where to look .
and plus are the compression a licensed product? any performance concerns? and any practical advices are highly appreciated here.

Table compression does not require any additional licenses the key is that the only compression is done via direct insert pretty good for a data warehouse. To get and maintain compression for regular inserts and for updates an Advanced Compression license is required.
Performance for inserts using direct method does not appear to have any large impact to load performance, however updates and regular inserts do take a bit of a hit when using compression. Queries that have any significant IO operations appear to benefit the most from compression and the larger the number of IO operations the higher the performance impact tends to be. Keep in mind that compression does take a CPU hit for the compression and de-compression operations, while this does not appear to be really large it is a consideration if your system have CPU resource issues already.
I have found that partitioning and compression when used together offers the best performance when accessing using the partition key and partitioning offers benefits for management as well, found range/interval partitioning offered the best management benefits for a data warehouse.
Some references besides the documentation which is a decent place to start, also google searches on Oracle Advanced Compression returns tons of results:
http://www.techrepublic.com/whitepapers/oracle-database-11gr2-reduces-storage-costs-and-improves-performance/1728273
Looks at table compression and 11g Advanced compression
http://myeverydayoracle.blogspot.com/2010/11/oracle-10g-compression-vs-11gs-advanced.html
Basic Exaplinations and examples for compression
http://practical-tech.blogspot.com/2012/01/oracle-11gr2-table-level-compression.html
Partitioning
http://www.oracle.com/technetwork/database/bi-datawarehousing/twp-partitioning-11gr2-2010-10-189137.pdf
http://www.oracle.com/technetwork/database/options/partitioning/ds-partitioning-11gr2-2009-09-134551.pdf

How to get list of indexes compressed using Key Compression !!

Hi....Experts.
How can i find out INDEXES compresses in my system using Index Key compression as explained in Note #1109743
Ref : SAP Note 1109743 - Use of Index Key Compression for Oracle Databases
Ref : Find out INDEX type ?? for INDEX Key Compressions. !!!
(or)
I got a foolish question in my mind,
Rgds

Hi,
Check Section 17 of Note 1289494 - FAQ: Oracle compression
How do I determine which tables and indexes have active compression?
SELECT
OWNER,
INDEX_NAME,
NULL PARTITION_NAME,
PREFIX_LENGTH
FROM
DBA_INDEXES
WHERE
COMPRESSION = 'ENABLED'
UNION ALL
( SELECT
    INDEX_OWNER OWNER,
    INDEX_NAME,
    PARTITION_NAME,
    NULL PREFIX_LENGTH
FROM
    DBA_IND_PARTITIONS
WHERE
    COMPRESSION = 'ENABLED'
ORDER BY
OWNER,
INDEX_NAME;
Hope it helps.
Thanks
Sushil

Partitioned table Indexing

Hi Experts,
I wanted to repartition my cube, so I compressed my Cube and repartition on the basis of 0calmonth.
Now When I check the Index structure of F and E fact table. F table has got Index 900 or Local Partition Index based on SID_0CALMONTH but E table does not have such kind of Index.
Now my question is after compression my data is in E fact table and partitioined successfully, so how does this Index 900 help Fetching partitioned data from E fact table when it is based on F fact table ??
Thanks & Regards,
Subbuji

Hi Suman,
I am not seeing data in F table, obviously there will be no data in F table after compression.
I am checking the Indices in F table and there I found Index 900, which is nothing but Index on Partition key.
My Question is if it is recommended to Partitiion after compression or Partition the E table then why the index is based on F table ? or why there is no such kind of index on E table.
Thanks & Regards,
Subbuji

How to obtain the table index in word use LabVIEW Report Generation Toolkit for Microsoft Office

I created a word templete and it had several tables. When I use the "Word Edit Cell" function in LabVIEW Report Generation Toolkit for Microsoft Office, the function need "table index", and I didn't find any function to get or set the table index in word document. How can I achieve my attention to write value to specified table cell using the "Word Edit Cell" function?
Thanks for reply!
YangAfreet

Hi yangafreet
You do not need to get the table index for the word edit cell.vi from anywhere. LabVIEW will automatically index all the tables in the document. See the attatched vi for an example.
Rich
Attachments:
Table Edit.vi ‏23 KB

To Use Cursor or TYPE table Index by PLS_integer

Hi All,
Let's see if I have table with no. of records 19,26,20,000.
If I want to loop through all the records which will be a optimized way To Use Cursor or TYPE table Index by PLS_integer.
Please guide.
Thanks.

What is it you want to do to/with the rows you're looping through?
Ideally you want to avoid looping, as that's row by row (aka slow by slow) processing and it's expensive time-wise.
If you're doing DML (insert/update/delete) then you're best off doing it in one sql statement, rather than looping.

Fact Table index vs BIA Index

BIA gurus..
Prior to our BIA implementation we had the drop and rebuild index process variants in our process chains.
Now after the BIA implementation we have the BIA index roll-up process variant included in the process chain.
Is it still required to have the drop and rebuilt index process variants during data load ?
Do the infocube fact table indexes ever get hit after the BIA implementation ?
Thanks,
Ajay Pathak.

I think you still need the delete/create Index variants as it not only helps in query performance but also speeds up the load to your cubes.
Documentation in Perfomance tab:
"Indices can be deleted before the load process and after the loading is finished be recreated. This accelerates the data loading. However, simultaneous read processes to a cube are negatively influenced: they slow down dramatically. Therefore, this method should only be used if no read processes take place during the data loading."
More details at:
[http://help.sap.com/saphelp_nw70/helpdata/EN/80/1a6473e07211d2acb80000e829fbfe/frameset.htm]

Need to find total no fo tables/index/m.views in my database

Hello Everyone ;
How can i find total no fo tables/index/m.views in my database ?
when i google i have seen following command ;
SQL> Select count(1) from user_tables where table_name not like '%$%' /
COUNT(1)
but i dont understand what '%$%' indicates ?
Thanks all ;

Hello Everyone ;
How can i find total no fo tables/index/m.views in my database ?
when i google i have seen following command ;
SQL> Select count(1) from user_tables where table_name not like '%$%' /
COUNT(1)
but i dont understand what '%$%' indicates ?
Thanks all ;
consider to simply Read The Fine Manual YOURSELF!
Oracle Database Search Results: like

External Table Authentication in OBIEE 11g

Hi ,
I have a security table, which contains userid,displayname,group . I have imported Security table in Physical Layer. I'm creating session variables based on condition.
When am trying to logging into analytic s getting an error, invalid username and password . I'm using 11.1.1.6.0 version
How to handle external table authentication in OBIEE 11g version.
Regards,
Malli

Hi fiaz,
That links talks about 10g version.
Step1: We have imported a secutiry table in Physical layer.
Step2: Creating a session variable by selecting initilazation block.
Select user_name,group from security_table where user_id=':USER' and pwd=':password';
step3: created DISPLAYNAME,GROUP & USER VARIABLES in edit target window
After these modifications i was trying to logging with new user, which is there in security table.
I am getting an error that is invalid user or password.
Is there any other changes does it required here.
Regards,
Malli
Edited by: user10675696 on Dec 26, 2012 9:39 PM

Table & Index Compression on 11g

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