Basic vs Advanced Compression in Oracle 11g

Hi,
We are going to install Oracle 11gR2 in one new database server. Since the database will be used for Data Warehouse purposes and our company has rejected to pay licenses for "Oracle Advanced Compression", I wanted to know which options of "Basic Compression" are suitable for us, if we want to compress the biggest tables in our environment.
Thanks in advance for your feedback.
Regards,
Rubén

Hi;
OAC mean you need to pay extra money to oracle. We are using basic compression in our env. Please check this search. Check first 4 links which is explain already how&what basic compress
PS: This is installation related forum site. For your similar issue please use Oracle Discussion Forums » Oracle Database » General Questions forum part
Regard
Helios

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Advaced compression in oracle 11g

Hi,
We are migrating databases from oracel 10g to 11g and we are using advance compression, i have few question please help me to understand
1. if i enable compression on tables is index also get compressed if not how i can enable compression on indexes
2.For table compression i will take the DDL of tables from oracle 10g databases and i create the tables in oracle 11g with COMPRESS FOR ALL OPERATIONS is this the right approach
Appreciated the inputs
thanks

Hi,
I checked for one of the table ALTER TABLE MOVE COMPRESS FOR ALL OPERATIONS after upgrading to 11g from 10g and rebuild the index
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Thanks SriniChavali and Stefan. I can't make more answer "Helpful' so I couldn't do that for your answers! Here is my point. In Jonathan's blog i see this remarks:
"Sadly it seems that “compress for OLTP” (formerly “compress for all operations”) doesn’t compress for all operations, it compresses only for inserts, and the benefits it has over basic compression are that (a) it leaves 10% of the block free for updates, and (b) it doesn’t require direct path inserts to trigger compression. Given the limitations on how it works you may find that the problems it brings might make it something you want to avoid.... this is at this link: http://allthingsoracle.com/compression-in-oracle-part-3-oltp-compression/
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If you can work out a good strategy for using OLTP compression, though, think carefully about making a choice between freelist management and ASSM – there seem to be some undesirable side effects that appear when you mix OLTP compression with ASSM."
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Best regards

Existing table compression in oracle 11g

Hi,
We have a achema of 45gb in oracle 11g and need to compress the tables as it is rarely used,
please can you tell me what are the option available to compress the tables.
Thanks

Thanks for the update.
I was able to compress the other tables which are very less in size and i am able to find one lobsegment which is 37GB
so how i can use compression on the LOBSEGMENT as i could not found any document for this
i found one document in metalink says that
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OWNER SEGMENT_NAME SEGMENT_TYPE MB
WEBSPR SYS_LOB0000012869C00002$$ LOBSEGMENT 37760
and my existing lobsegment metadata is like below
LOB ("DATA") STORE AS (
TABLESPACE "WEBSPR_DATA" ENABLE STORAGE IN ROW CHUNK 8192 PCTVERSION 10
NOCACHE LOGGING
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Use or not to use table compression in Oracle 11g (11.2)?

Hi All,
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I know, we can go thru documentation and make a decision.
Still I have run some very simple tests here.
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Case 2. Create table with COMPRESS FOR ALL OPERATIONS and then update few records
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4 as
5 select * from all_objects ;
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SQL>
-- ---------- CASE 2 --------
SQL>
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2 nologging
3 compress for all operations
4 as
5 select * from all_objects ;
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*Elapsed: 00:00:05.31*
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SQL>
SQL>
-- ---------- CASE 3 --------
SQL> create table ccc
2 nologging
3 nocompress
4 as
5 select * from all_objects ;
Table created.
Elapsed: 00:00:01.84
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Hi,
I have realised that I am using the syntax which is deprecated in 11.2.
So I am doing the same test with
COMPRESS BASIC
COMPRESS FOR OLTP
instead of
COMPRESS FOR DIRECT_LOAD OPERATIONS (deprecated)
COMPRESS FOR ALL OPERATIONS (deprecated)
But the results are same. Even if I do COMPRESS FOR OLTP, my update is taking 5.4 seconds which is not very different from COMPRESS BASIC
-- --------- CASE 1 ---------------
SQL> create table aaa
2 nologging
3 compress basic
4 as
5 select * from all_objects ;
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Elapsed: 00:00:02.46
SQL>
SQL> select count(*) from aaa ;
COUNT(*)
     50318
Elapsed: 00:00:00.11
SQL>
SQL> update aaa set created=sysdate where owner='SYS' and object_type='VIEW';
3485 rows updated.
Elapsed: 00:00:05.48
-- ---------- CASE 2 ---------------
SQL> create table bbb
2 nologging
3 compress for oltp
4 as
5 select * from all_objects ;
Table created.
Elapsed: 00:00:02.01
SQL>
SQL> select count(*) from bbb ;
COUNT(*)
     50319
Elapsed: 00:00:00.12
SQL>
SQL> update bbb set created=sysdate where owner='SYS' and object_type='VIEW';
3485 rows updated.
Elapsed: 00:00:05.25
-- ---------- CASE 3 ---------------
SQL> create table ccc
2 nologging
3 nocompress
4 as
5 select * from all_objects ;
Table created.
Elapsed: 00:00:01.81
SQL>
SQL> select count(*) from ccc ;
COUNT(*)
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Elapsed: 00:00:00.10
SQL>
SQL> update ccc set created=sysdate where owner='SYS' and object_type='VIEW';
3485 rows updated.
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Hi,
We have recently implemented index key compression in our sap R3 environments, but unexpectedly this has not resulted in any reduction of index growth rates.
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Basic vs Advanced Compression in Oracle 11g

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