Tune Oracle tables for performance

Hi,
I am using an application that will dynamically insert network
traffic data into about a dozen tables on a 9i database. Since I
am fairly new to Oracle, I would like to know the best method for
tuning/configuring these tables for best possible performance.
What I'm looking for is how I can configure Space, Extents, Free
Lists, etc. for these tables so I can realize the best possible
performance.
Thank you,

I know some terms
1) Setting the block size in inti.ora
2) Putting Rollback segement files into different database and datafiles into different disk storage.
3) Creating temp table space with free option
4) Clustering your tables and indexing them
5) Quering your data with query Hints
But for exact statitstics you should got asktom.oracle.com. This person Tom, is might have best solution for you.
If you get the reply plz mail me at [email protected]

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Design table for performance (order - ordervisibility)

I have tables like order, orderitem, etc. and requirements for order visibility:
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create table order (orderid number, ...);
create table ordervisibility (orderid number, username varchar2(20));
Order size is estimated to be >=500Mio. Application is a data warehouse with reporting.
The relationship order - user will be skewed: some users will be allowed to see many orders while some will only see a small percentage.
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<<<What is your 4 digit Oracle version (result of SELECT * FROM V$VERSION)?
The system does not exist yet. Version will be derived from the requirements or most likely the latest version (e.g. 11.2.0.3 EE with partitioning option)
<<<Are you wanting to prevent users from seeing other orders? You said one user can see many orders but are they NOT supposed to see other orders?
Yes, you are right. We want to prevent other users to see orders that do not belong to them.
<<<What determines which orders a user is allowed to see? A state code, a region code?
The user in the OLTP system decides who can see orders (the user creating the order and maybe other users he selects)
<<<Does this database, data and system already exist or is this a new design? Are there any other security mechanisms already in place? Is any of your data currently encrypted?
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Jonathan Lewis wrote:
Lother wrote:
We are planning to move the NORM tables to DENORM tables in Oracle DB for a client for performance issue. Any Idea on the design/approach we can use to migrate this HUGE data (2 billion records/ 5TB of data) in a window of 5 to 10 hrs (Or minimum than that also).
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Regards
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Oracle Table for 'Date Effectivity To' field in Bill Of Materials Screen

Hi Apps Gurus,
In Oracle EBS Bill Of Materials Screen under the tab Date Effectivity, there is column: 'To' which indicates the end date upto which the BOM is active.
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Hi RG,
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Hi,
I would like to know about tuning Oracle Applications adapter for performnace .
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Regards,
Sundar

Hi,
Oracle JDeveloper 11g 11.1.2... doesn't include the SOA and WebCenter pieces - to use these components you'll need to download Oracle JDeveloper 11.1.1.6.0...
http://www.oracle.com/technetwork/developer-tools/jdev/downloads/jdeveloper11116-1377208.html
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Hello.
I'm in the process of putting some indexes on tables for performance improvement of queries run.
eg the foll query -
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Please suggest.

An Index that includes all the columns of the SELECT clause with those of the WHERE clause is a "skinny table".
Using such an Index avoids accesses to the table entirely.
There are situations where the DBA or Designer may choose to create such an Index.
Downsides ?*
If there are too many columns in the Index, the Index itself may become too large. When the index is too large for Oracle to be able to cache blocks, Oracle may have to undertake multiple single block read calls to the OS if accessing many rows. This can make the index counter-productive.
Index maintenance overheads increase -- the probability that the index also has to be updated with every UPDATE statement on the table increases. Also, every INSERT and DELETE makes that much more effort updating the Index Leaf Blocks (ie the size of the update to the Index is larger, the Index Key being larger).
Some queries might be executed using Skip Scan Search of the index when, properly, it might have made more sense to put those query columns in a seperate index.

Oracle Configurations for High User Volume

Hi,
Can anyone point me to some resources which discusses choosing a suitable Oracle configuration ?
Like what configurations are best suited for a high user(5K to 10 concurrent logged in users) Architecture ?
Regards,
Amila.

Hi,
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Pravesh.

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Hi,
Can u help me write this FM from the SAP side?
So, I have two tables ZTABLE in SAP and Oracle table ORAC.
Let's put three columns in each of them, for example
TEL1
TEL2
ADRESS
NAME
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(in FM there shoud be abap code for writing data in ZTABLE after we press some pushbutton made in sap screen painter..)
for example, when we write new record in ZTABLE
00
112233
Street 4
Name1
this data shoud be inserted in Oracle table ORAC.
when we write new record in Oracle table for example
01
445566
New Street
Name2
this data shoud be inserted in ZTABLE.
Field TEL1 can be only of two values 01 or 02, other combination is not valid...
I must have all data from Oracle table ORAC in ZTABLE and opposite.
It should be the same scenario for DELETE...
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Thanks a lot,
Nihad

I dont know if we can directly connect to a oracle database ( wait for the answers from others on this )
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4) XI to format it and insert into the oracle table
Mathews

Updating Oracle table with info from Sybase query

I hope this is the correct forum for this question.
I am fairly new to Java and JDBC. I am trying to figure out what the best method for updating information in Oracle tables with data from a Sybase table. I would prefer to use Oracle’s transparent gateway but this is not an option my company will pay for so I am creating a java stored procedure and using JDBC to connect to the Sybase database.
The process I think I need to go thru is
1.     Query an Oracle table to get the records that need to be updated and the “key” information to query the Sybase table with.
2.     Use that result to query the Sybase database to get the fields that need to be updated in the Oracle table for those records.
3.     Update the records on the Oracle table with the data from the Sybase query.
I know I can just do this procedurally, row-by-row, but I was wondering if anyone knows of a way to accomplish this with SQL and no loops. Is there a way to make a result set available as a “SQL table” for another JDBC query?
Basically what I would like to do is:
OraQuery = “ select sybinfo from sometable where updated_date = null”;
Statement orastmt1 = OraConn.createStatement();
ResultSet Orars1 = orastmt1.executeQuery (OraQuery);
SybQuery = “select update_date, sybinfo from sybtable where sybinfo = Orars1.sybinfo”;
Statement sybstmt = SybConn.createStatement();
ResultSet Sybrs = sybstmt1.executeQuery (SybQuery);
OraUpdate = “update (select update_date from sometable, Sybrs where sometable.sybinfo = Sybrs.sybinfo) set update_date = Sybrs.update_date”;
Statement orastmt2 = OraConn.createStatement();
ResultSet Orars2 = orastmt2.executeQuery (OraUpdate);
This may not be possible but if anyone has done something similar and wouldn’t mind sharing I would appreciate it. If there is a “better” way of accomplishing this I am open to suggestions.
Thanks

you can try using cachedRowSet() for the Oracle side query.
The rows in this could be populated using the sybase side query's resultset and then all of this could updated into Oracle in one shot.

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State: HY000. Code: 10058. [NQODBC] [SQL_STATE: HY000] [nQSError: 10058] A general error has occurred. [nQSError: 42043] An external aggregate is found in an outer query block. (HY000)
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Thanks

Thanks Christian I found some very useful articles (one or two by you) - I'll have to look harder on the net before posting.
One thing I found out, with respect to vertical federation, that others may benefit from, is that I fuond it much easier to start from the most detailed level and then attach the less detailed source rather start with the less detailed and add the additional on.

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Hi!
I have an XML file (loaded into a CLOB) which I need to parse and have each individual element and attribute inserted into an oracle table for manipulation.
Eg: XML File...
<PERSON>
<PER_ID changed="1">1</PER_ID>
<SURNAME changed="1">MARTIN</SURNAME>
<ADDRESS>
<STREET_NO changed="1">1</STREET_NO>
<POSTCODE changed="1">LE3 8RA</POSTCODE>
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From this I need to extract
* PER_ID and related changed attribute
* SURNAME and related changed attribute
* STREET_NO and related changed attribute
* POSTCODE and related changed attribute
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( PER_ID VARCHAR2(10)
, ID_CHANGED VARCHAR2(1)
, SURNAME VARCHAR2(30)
, ID_CHANGED VARCHAR2(1)
, STREET_NO VARCHAR2(5)
, ID_CHANGED VARCHAR2(1)
, POSTCODE VARCHAR2(10) );
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Thanks a million in advance to anyone who can crack this!!
Jay

Try looking at this thread
Loading datafrom a PL/SQL table into the Database table

Oracle Analyzer or Some thing else ?(for performance & tunning)

Hi
Any body have idea about the tool Oracle Analyzer for performanace & tuning,i heard about this but i couldn't find any sort of documentation on this tool any where.Did this change
from Oracle Analyzer to Some thing else?.
Please help in this regard
Thanks
Sreeni

dear sreenivasa kanneganti,
this is the script to analyze the table and compute statistics
cheers
ANALYZE TABLE USER_NAME.TABLE_NAME COMPUTE STATISTICS
from what I know statistics are used by the Oracle Optimizer
(if it is set in CHOOSE mode, it is written in the init.ora)
which stores these statistics in a dictionary of data
If you want to check the integrity of data you have to use the clause VALIDATE_STRUCTURE
Of course you have to have the grant to ANALIZE_ANY
Remember to run the ANALYZE and COMPUTE STATISTICS at the end of
the day, this because it takes a long time to run... ;-)
If you want to ANALIZE a complete schema you should use the
procedure DBMS_UTILITY.ANALIZE_SCHEMA
cheers
rjh

How to tune a table in oracle

hi
can anyone please help me in tunning a particular table in oracle which has millions of Record
kindly help me for the procedure to tune the table...
thanks
Regards
Misin

What's the Oracle version?
Does this table have LOB column ?
Make sure it's on locally managed tablespace.
Collect stats on the table and indexes if there is massive updates on the table.
Actually it's not about tuning the particular table but tuning the queries that your application use to access the table.
That in turn raise the question what's the nature of your application, is it DDS or OLTP application?
Do you experience any performance issue related to this table at all?

Abap Logic for performance tuning not working when using Internal tables

Hi,
I wrote this piece of code that is working correctly that is select SUM of cost from DSO where Plant is the same for Sales Items.
LOOP AT RESULT_PACKAGE INTO rp.
SELECT SUM( /N/S_STRDCOST ) FROM /N/ADSP_DPIT00 INTO
rp-/N/S_STRDCOST
WHERE /N42/S_SALESITEM = rp-/N42/S_ITEMID AND /N42/S_PLPLANT EQ
rp-/N42/S_SOURCE.
MODIFY RESULT_PACKAGE FROM rp.
Clear rp.
ENDLOOP.
Now I try to rewrite it for performance tunning using internal table but I am getting 0 values. can't figure out whats the problem and been struggling fixing it.
TYPES : begin of ty_DSO_TABLE,
         /N42/S_STRDCOST TYPE /N/ADSP_DSPC00-/N/S_STRDCOST,
         /N42/S_ITEMID TYPE /N/ADSP_DSPC00-/N/S_ITEMID,
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DATA: it_DSO_TABLE type hashed table of ty_DSO_TABLE with unique key
/N/S_ITEMID,
     wa_DSO_TABLE type ty_DSO_TABLE.
Field-symbols: <rp> TYPE tys_TG_1.
LOOP AT RESULT_PACKAGE assigning <rp>.
clear wa_DSO_TABLE.
Read table IT_DSO_TABLE into wa_DSO_TABLE with table key /N/S_ITEMID
= <rp>-/N/S_ITEMID.
if sy-subrc ne 0.
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      FIELDS OF wa_DSO_TABLE from
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     endif.
endif.
ENDLOOP.
Any idea whats wrong with the code
thanks

Hi Vaidya,
According to the code which you have written, there is no value in table IT_DSO_TABLE when you are trying to read the values.And after the read statement you have given a condition for sy-subrc. Hence the select statement is actually not even getting executed. *Also you have not assigned the final value back to the ResultPackage.*_
So Kindly correct your code as follows:
Data: wa_dso type ty_DSO_TABLE.
LOOP AT RESULT_PACKAGE assigning <rp>.
clear wa_DSO_TABLE.
select SUM( /N/S_STRDCOST ) into CORRESPONDING
FIELDS OF wa_DSO_TABLE from
/N/ADSP_DPIT00 WHERE /N/S_SALESITEM = <rp>-/N/S_ITEMID AND
/N/S_PLPLANT EQ <rp>-/N/S_SOURCE.
if sy-subrc eq 0.
<rp>-/N/S_STRDCOST = wa_DSO_TABLE-/N/S_STRDCOST.
MODIFY RESULT_PACKAGE FROM <rp>.
endif.
ENDLOOP.
Hope this helps you.
Regards,
Satyam

How to tune this query for the improve performance ?

Hi All,
How to tune this query for the improve performance ?
select a.claim_number,a.pay_cd,a.claim_occurrence_number,
case
when sum(case
when a.payment_status_cd ='0'
then a.payment_est_amt
else 0
end
)=0
then 0
else (sum(case
when a.payment_status_cd='0'and a.payment_est_amt > 0
then a.payment_est_amt
else 0
end)
- sum(case
when a.payment_status_cd<>'0'
then a.payment_amt
else 0
end))
end as estimate
from ins_claim_payment a
where a.as_of_date between '31-jan-03' and '30-aug-06'
and ( a.data_source = '25' or (a.data_source between '27' and '29'))
and substr(a.pay_cd,1,1) IN ('2','3','4','8','9')
group by a.claim_number, a.pay_cd, a.claim_occurrence_number
Thank you,
Mcka

Mcka
As well as EXPLAIN PLAN, let us know what proportion of rows are visited by this query. It may be that it is not using a full table scan when it should (or vice versa).
And of course we'd need to know what indexes are available, and how selective they are for the predicated you have in this query ...
Regards Nigel

Tune Oracle tables for performance

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