Reorganization of tablespaces, tables and indexes.

Hello Experts,
What is the concept of tablespaces, statistics , tables and indexes in SAP/Oracle ? Where are they used and what are they meant for ?
Wt is the concept and procedure of performing Reorganization of tablespaces, tables and indexes ? why do we need it for ?
Requested to revertb at earliest as its urgent . points guaranteed .
Regards,
Somya

Hello Somya,
Probably difficult to explain entire information in this thread. But you definately get good information in the following link
http://help.sap.com/saphelp_47x200/helpdata/en/0d/d2fafd4a0c11d182b80000e829fbfe/frameset.htm
Please drill down through menus, and you will be able to get good information.
Also you can check the following SAP notes
666061     FAQ: Database objects, segments and extents
912620     FAQ: Oracle indexes
588668     FAQ: Database statistics
592393     FAQ: Oracle
541538     FAQ: Reorganizations
Regards,
Madhukar

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Hi,
We have a schema for which the its tables are stored in seperate tablespace and indexes are stored in different tablespace. Now we have take full schema export. Now we want to import it on another schema. Now I want to know if the we have difference in the tablespace name we use REMAP_TABLESPACE clause of the impdp command but what about the seperate tablespace for table and indexes. How would Oracle handle this.
Regards,
Abbasi

Hi,
I hope you created the same tablespace structure on the target side if not so remap_tablespace option you have to use for specifying different tablespaces.Oracle will take care of putting data and index.Any how if a index is moved from one tablespace to other you have to rebuild them,once you rebuild them than only stattistics are gathered otherwise you
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Best regards,
Rafi.
http://rafioracledba.blogspot.com
Edited by: Rafi (Oracle DBA) on May 9, 2011 7:07 AM

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Message was edited by:
bikerc

Guess I am not real clear what you want.
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Hi,
I moved table and indexes another tablespace. After move many indexes got unusable state. I couldn't understand thiis?
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regards and thanks?

hi,
check this query below
create table test (id number(10));
create table succeeded.
insert into test values (10);
1 rows inserted
commit;
create index test_indx on test(id);
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select index_name, status from dba_indexes
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rebuliding index
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then check
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INDEX_NAME STATUS
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~ Madrid
http://hrivera99.blogspot.com/

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Dear All,
I did the Quality refresh by System copy export/import method. ECC6 on HP-UX DB29.7.
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b) Automatic runstats are enabled in db2 parameters
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Regards
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Hi Deepak,
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I would be very grateful for your help.
Below are the code snippets for the table and index, and an insert statement.
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INDEXTYPE IS mdsys.spatial_index
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PARTITION p_lt_0_75s,
PARTITION p_lt_0_60s,
PARTITION p_lt_0_45s,
PARTITION p_lt_0_30s,
PARTITION p_lt_0_15s,
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PARTITION p_lt_0_30n,
PARTITION p_lt_0_45n,
PARTITION p_lt_0_60n,
PARTITION p_lt_0_75n,
PARTITION p_lt_0_90n,
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Dave

Thank you for your quick reply. I did not post the entire CREATE script as it is quite long. The portion of the script that is applicable to the INSERT is:
,PARTITION p_lt_45e_90s
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Or, I do not fully understand. Are you indicating that I must explcitly state the longitude in each clause,
e.g ,PARTITION p_lt_45e_45n
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,PARTITION p_lt_45w_45n
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If so, that answers the question of why it cannot find a partition, however an Oracle White Paper "Oracle Spatial Partitioning Best Practices" Sept 2004, discusses multi column partitioning such as represented by this problem, and gives an INSERT statement example of :
CREATE TABLE multi_partn_table (in_date DATE,
geom SDO_GEOMETRY, x_value NUMBER, y_value NUMBER)
PARTITION BY RANGE (X_VALUE,Y_VALUE)
PARTITION P_LT_90W_45S VALUES LESS THAN (1,-45),
PARTITION P_LT_90W_0 VALUES LESS THAN (1,0),
PARTITION P_LT_90W_45N VALUES LESS THAN (1,45),
PARTITION P_LT_90W_90N VALUES LESS THAN (1,MAXVALUE
and as I am writing this I am seeing that I failed to include the longitude and latitude in the SDO_GEOMETRY clause, so it does appear tht I need to explicitly state the longitude valuues.
What is your judgement sir?
Dave

Separate table and index data in RAC database

Hi Experts,
Our database is Oracle11g RAC database. I need your expertise on this
Do we need to retain the table and index data in two different tablespaces for performance perspective in RAC database too?
Please share your practical experience…Thanks in advance.
Regards
Richard

g777 wrote:
In my opinion, if there is striping implemented then performance shouldn't degrade even if the index and table blocks are in one tablespace. Exactly.. striping is NOT a good idea at tablespace level as a tablespace is a logical storage device. It is very difficult to stripe comprehensively/correctly at that level, if not impossible.
Striping is a function of the actual storage system and need to happen at physical level. A proper RAID0 implementation.
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Dear All(s)
How i check space used (and number of rows) by each table and index in schema. ( can i check current space utilization and sysdate-date past in time)
How i can check used, and free space for each database and tablespace.
Thanks

You can always use the search feature
anyway
how to calculate the percentage of free space for a table in Oracle
Re: incorrect free space in dba_free_space
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How to partition tables and indexes in this scenario?

So our situation is pretty simple. We have 3 tables.
A, B and C
the model is A->>B->>C
Currently A, B and C are range partitioned on a key created_date however it's typical that only C is every qualfied with created date. There is a foreign key from B -> A and C -> B
we have many queries where the data is identified by state that is indexed currently non partitioned on columns in A ... there are also indexes on the foreign keys that get from C -> B -> A. Again these are non partitioned indexes at this time.
It is typical that we qualify A on either account or user or both. There are indexes (non partitioned) on these
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Edited by: steffi on Jan 14, 2011 11:36 PM

We are wondering how we can benefit from partitioning and or sub partitioning table A. since it's partitioned on >created_date but rarely qualify by that. Very good question. Why did you partition on it? You will never have INSERTS on these partitions, but maybe deletes and updates? The only advantage (I can think of) would be to set these partitions in a read only tablespace to ease backup... but that's a weired reason.
we have many queries where the data is identified by state that is indexed currently non partitioned on columns in >A ... there are also indexes on the foreign keys that get from C -> B -> A. Again these are non partitioned indexes at >this time.Of course. Why should they be partitioned by Create_date?
It is typical that we qualify A on either account or user or both. There are indexes (non partitioned) on these
We have a problem now because many of the queries use leading wildcards ie. account like '%ACCOUNT' etc. This >often results in large full table scans. Our solution has been to remove the leading wildcard but this isn't always possible.I would suspect full index scan. Isn't it?
We are also wondering where and how we can benefit from either global partitioned index or local partitioned >indexes on tables A. We suspect that the index on the foreign key from C to B could be a local partitioned index.As A is not accessed by any partition, why should C and B profit? You should look to partition by the key you are using to access. But, you are looking to tune your SQLs where the access is like '%ACCOUNT' on A. Then when there is a match. ORACLE joins via your index and nested loop (right?) to B and C.
I am also wondering what impact pushing the state from A that's used to qualify A down to C would have any >advantage.Why should it. It just makes the table and indexes larger => more IO.
C is the table that currently we qualify with the partition key so I figure if you also pushed down the state from A >that's used to qualify the set of C's we want based on the set of B's we want based on the set of A thru qualfying >on columns within A.If the access from A to C would be .. AND A.CREATE_DATE =C.CREATE_DATE and c.key like '%what I want%' which does not qualifify for a FK ;-) then, as that could be resulting in a partition scan, you could "profit". But, I'm sure that's not your model.
If we push down some of those values to C and simply use C when filtering I'm wondering what the plans will look >like compared to having to work all the way up from the bottom to the top before it begins qualifying A.So you want to denormalize A,B,C and into one table? With the same access is like '%ACCOUNT' you would get a full scan on an index as before, just the objects would be larger due to redundance and harder to maintain. In the end you would have a bad and slower design.
Maybe you explain what the problem is.
Full index scan can not be avoided, but that can be made faster by e.g. parallel query, and then the join to B and C should be a "snip" if you just identify a small subset of rows in these tables.

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Hi all,
Good day..
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thanks,
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What will be the table size if?
<or>
break on report
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Hi All,
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Hi,
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Rakesh

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This option Indexes not created is an SAP table maintained from Dev to Prod just to indicate that these indexes cannot be created.
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It's a fool questions, i found the reason is so easy^^

Reorganization of tablespaces, tables and indexes.

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