EHCC AND DML OPERATIONS

Hello everyone,
I write for a question.
We migrated a db from an old Solaris machine with 10G to an Exadata with 11gR2.
Now, we would enable EHCC on tables that are the core of our DWH.
In compressing tables and partitions, do we need to make some considerations regarding DML applied on?
Tables are treated using two group of DML: "insert or update" and "delete then insert".
For completeness, we do so using Datastage.
There are other considerations or parameters to take into account?
Thanks
Greetings
Sandro

Some other inputs on this thread are-
EHCC has following 4 options and you can use them as per your need.
1. ARCHIVE HIGH
2. ARCHIVE LOW
3. QUERY HIGH
4. QUERY LOW
Following are the guidelines to choose above option.
Query High
Lots of Read
Rarely updated
Query Low
Lots of Read
Some inserts
Archive High (COLD OR ARCHIVE DATA)
Rarely Read
Never updated
Archive low
Frequently read
Sometimes updated
There is compression advisor tool that can tell you the possible benefit of using any of above option. You can use this advisor to decide on which way to go.
following whitepaper has very useful information.
http://www.oracle.com/technetwork/database/exadata/ehcc-twp-131254.pdf
following presentation also has very nice information. Slide 16 summarizes it.
http://www.oracle.com/au/products/database/311358-132337.pdf
Hope it helps.
Thanks,
Abhi

Similar Messages

How to Track DDL and DML Operations happening in Backend into Log Files....

Hi I have one requirement for Tracking the DDL And DML Operation happening in Backend once the user Inserts or Updates any Table.How to Implement the same can anyone proviode the code for the same.
Ex: I have multiple tables in my database if any user fires the DDL or DML it should make entry in the Log file as
Name of the Table Operation Timestamp
X Insert DD-MM-YYYY HH24:MM:SS
Y Update DD-MM-YYYY HH24:MM:SS
Z Delete DD-MM-YYYY HH24:MM:SS
L Select DD-MM-YYYY HH24:MM:SS
Is it Possible to Develop it through Procedure,Function or Package,please give me Idea,,,,,

Please do not post same question in multiple forum. How to Track DDL and DML Operations happening in Backend into Log Files....
What's wrong with the answers posted in the above forum ? Do you go through the "AUDIT" option as suggested in the above post by various members ?

Date Field Displaying and DML Operations

Hi all,
I have an issue with displaying and updating date columns that I'm hoping someone can assist me with.
I'm using APEX 3.0.1.
I have a Form page with a number of fields sourced from one database table that are being populated by an Automatic Row Fetch On Load - After Header.
The Item P6_MONTHFOR is stored as a Date datatype in the table and displayed on the form using the Date Picker (use Item Format Mask). I have a Format Mask set as 'MON-RR'. I want to ensure that the last day of the month is saved back to the database table so have been trying various calculation techniques to try and achieve this but am experiencing a variety of SQL errors!
I have tried using LAST_DAY(:P6_MONTHFOR) in the Post Calculation Computation, or as a separate Computation After Submit.
I have also tried having P6_MONTHFOR as a hidden column and using display Items and then trying Item calculations to then update the value of P6_MONTHFOR column prior to DML operations but to no avail.
The only DML operations allowed on these rows are DELETE and UPDATE and I'm using an Automatic Row Processing (DML) On Submit - After Computations and Validations process to control these operations.
Any help or suggestions greatly appreciated :-)
Kind Regards,
Gary.

the function LAST_DAY is a date function, expecting a date as input. Since it is all web, the values of items are as string/varchar2. In order to use date-function, you have to first make it a date with to_date() with the format-mask (DD-MON-RR).
In my opinion Dates are still tricky, it would be great if ApEx would have a DV() function, next to the V() and NV() functions, It is in ApExLib (of Patrick Wolf)
Simon

About DDl and Dml Operations On B1

Hi ,
I had Created A form In SDk Using UiAPI, It Contains Five Text Fields And One Button. And I had Created An EMP Table.It Contains Five Fileds. My Question Is:----
>
When I clicked Button , The data Entered In TextFields(EditText) Need To stored in Database. Similirly All The Operation Need To Do. How Can we Do In sdk. Please tell Me code
Regards
Srinivas

Srinivas,
Please look at the subject of "Binding Items to Data SourcesBinding Items to Data Sources" in the SAP Business One SDK Help Center Documentation. This should assist you and show you code samples.
Eddy

Data Blocks - Different data source for Query and DML

Would anyone please tell me if it is possible in a BLOCK to define a stored procedure for queriying and a table for DML operations or vice-versa at the SAME time.
If possible how do you do it using DATA BLOCK WIZARD? If you select your block to be based on stored procedure then it gives only stored procedure options for Querying and DML operations in next few screens.
Also, suppose I used a stored procedure defined in a block for insert operations, is it implicitly called by INSERT RECORD function key in default menu? How does it take values from different fields on its own?

Hi Deepon,
We get data from both BSIK(open items)and BSAK (cleared items). Obviously if a accounting doc is not cleared it would be in open items and vice versa..
Go through the help link for more information..
http://help.sap.com/saphelp_bw33/helpdata/en/90/10e73a86e99c77e10000000a114084/frameset.htm
Regards
Manga(Assign points if it helps)
Message was edited by: Manga

INDEX and DML

Hello every one,
I have may be crazy question but i am confused.
1. Does indexes store the data of column in the database other then the base table or refernces to table? Plesae make my doubt clear. I read th doc already.
2.When we do DML on table, does index gets updated on every commit or every dml of at certain inteval or only when Index is analysed or re build.
May be this questions are helpful to other also.
Thank you in advance
Message was edited by:
user553284

index acts like a table-data in some way:
It is being changed when you modify your data. It generates the undo and redo data. if the transaction is commited, then practically no additional actions are taken. When transaction is rolled back, the Oracle Database perform many operations to restore the table data and the index data in the state they were before the transaction began.
Please note that index SLOW DOWN DML operations! The more indexes you have the MORE time you need to perform similar DML operations.

"cannot perform a DML operation inside a query" error when using table func

hello please help me
i created follow table function when i use it by "select * from table(customerRequest_list);"
command i receive this error "cannot perform a DML operation inside a query"
can you solve this problem?
CREATE OR REPLACE FUNCTION customerRequest_list(
p_sendingDate varchar2:=NULL,
p_requestNumber varchar2:=NULL,
p_branchCode varchar2:=NULL,
p_bankCode varchar2:=NULL,
p_numberOfchekbook varchar2:=NULL,
p_customerAccountNumber varchar2:=NULL,
p_customerName varchar2:=NULL,
p_checkbookCode varchar2:=NULL,
p_sendingBranchCode varchar2:=NULL,
p_branchRequestNumber varchar2:=NULL
RETURN customerRequest_nt
PIPELINED
IS
ob customerRequest_object:=customerRequest_object(
NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
condition varchar2(2000 char):=' WHERE 1=1 ';
TYPE rectype IS RECORD(
requestNumber VARCHAR2(32 char),
branchRequestNumber VARCHAR2(32 char),
branchCode VARCHAR2(50 char),
bankCode VARCHAR2(50 char),
sendingDate VARCHAR2(32 char),
customerAccountNumber VARCHAR2(50 char),
customerName VARCHAR2(200 char),
checkbookCode VARCHAR2(50 char),
numberOfchekbook NUMBER(2),
sendingBranchCode VARCHAR2(50 char),
numberOfIssued NUMBER(2)
rec rectype;
dDate date;
sDate varchar2(25 char);
TYPE curtype IS REF CURSOR; --RETURN customerRequest%rowtype;
cur curtype;
my_branchRequestNumber VARCHAR2(32 char);
my_branchCode VARCHAR2(50 char);
my_bankCode VARCHAR2(50 char);
my_sendingDate date;
my_customerAccountNumber VARCHAR2(50 char);
my_checkbookCode VARCHAR2(50 char);
my_sendingBranchCode VARCHAR2(50 char);
BEGIN
IF NOT (regexp_like(p_sendingDate,'^[[:digit:]]{4}/[[:digit:]]{2}/[[:digit:]]{2}$')
OR regexp_like(p_sendingDate,'^[[:digit:]]{4}/[[:digit:]]{2}/[[:digit:]]{2}[[:space:]]{1}[[:digit:]]{2}:[[:digit:]]{2}:[[:digit:]]{2}$')) THEN
RAISE_APPLICATION_ERROR(-20000,cbdpkg.get_e_m(-1,5));
ELSIF (p_sendingDate IS NOT NULL) THEN
dDate:=TO_DATE(p_sendingDate,'YYYY/MM/DD hh24:mi:ss','nls_calendar=persian');
dDate:=trunc(dDate);
sDate:=TO_CHAR(dDate,'YYYY/MM/DD hh24:mi:ss');
condition:=condition|| ' AND ' || 'sendingDate='||'TO_DATE('''||sDate||''',''YYYY/MM/DD hh24:mi:ss'''||')';
END IF;
IF (p_requestNumber IS NOT NULL) AND (cbdpkg.isspace(p_requestNumber)=0) THEN
condition:=condition|| ' AND ' || ' requestNumber='||p_requestNumber;
END IF;
IF (p_bankCode IS NOT NULL) AND (cbdpkg.isspace(p_bankCode)=0) THEN
condition:=condition|| ' AND ' || ' bankCode='''||p_bankCode||'''';
END IF;
IF (p_branchCode IS NOT NULL) AND (cbdpkg.isspace(p_branchCode)=0) THEN
condition:=condition|| ' AND ' || ' branchCode='''||p_branchCode||'''';
END IF;
IF (p_numberOfchekbook IS NOT NULL) AND (cbdpkg.isspace(p_numberOfchekbook)=0) THEN
condition:=condition|| ' AND ' || ' numberOfchekbook='''||p_numberOfchekbook||'''';
END IF;
IF (p_customerAccountNumber IS NOT NULL) AND (cbdpkg.isspace(p_customerAccountNumber)=0) THEN
condition:=condition|| ' AND ' || ' customerAccountNumber='''||p_customerAccountNumber||'''';
END IF;
IF (p_customerName IS NOT NULL) AND (cbdpkg.isspace(p_customerName)=0) THEN
condition:=condition|| ' AND ' || ' customerName like '''||'%'||p_customerName||'%'||'''';
END IF;
IF (p_checkbookCode IS NOT NULL) AND (cbdpkg.isspace(p_checkbookCode)=0) THEN
condition:=condition|| ' AND ' || ' checkbookCode='''||p_checkbookCode||'''';
END IF;
IF (p_sendingBranchCode IS NOT NULL) AND (cbdpkg.isspace(p_sendingBranchCode)=0) THEN
condition:=condition|| ' AND ' || ' sendingBranchCode='''||p_sendingBranchCode||'''';
END IF;
IF (p_branchRequestNumber IS NOT NULL) AND (cbdpkg.isspace(p_branchRequestNumber)=0) THEN
condition:=condition|| ' AND ' || ' branchRequestNumber='''||p_branchRequestNumber||'''';
END IF;
dbms_output.put_line(condition);
OPEN cur FOR 'SELECT branchRequestNumber,
branchCode,
bankCode,
sendingDate,
customerAccountNumber ,
checkbookCode ,
sendingBranchCode
FROM customerRequest '|| condition ;
LOOP
FETCH cur INTO my_branchRequestNumber,
my_branchCode,
my_bankCode,
my_sendingDate,
my_customerAccountNumber ,
my_checkbookCode ,
my_sendingBranchCode;
EXIT WHEN (cur%NOTFOUND) OR (cur%NOTFOUND IS NULL);
BEGIN
SELECT requestNumber,
branchRequestNumber,
branchCode,
bankCode,
TO_CHAR(sendingDate,'yyyy/mm/dd','nls_calendar=persian'),
customerAccountNumber ,
customerName,
checkbookCode ,
numberOfchekbook ,
sendingBranchCode ,
numberOfIssued INTO rec FROM customerRequest FOR UPDATE NOWAIT;
--problem point is this
EXCEPTION
when no_data_found then
null;
END ;
ob.requestNumber:=rec.requestNumber ;
ob.branchRequestNumber:=rec.branchRequestNumber ;
ob.branchCode:=rec.branchCode ;
ob.bankCode:=rec.bankCode ;
ob.sendingDate :=rec.sendingDate;
ob.customerAccountNumber:=rec.customerAccountNumber ;
ob.customerName :=rec.customerName;
ob.checkbookCode :=rec.checkbookCode;
ob.numberOfchekbook:=rec.numberOfchekbook ;
ob.sendingBranchCode:=rec.sendingBranchCode ;
ob.numberOfIssued:=rec.numberOfIssued ;
PIPE ROW(ob);
IF (cur%ROWCOUNT>500) THEN
CLOSE cur;
RAISE_APPLICATION_ERROR(-20000,cbdpkg.get_e_m(-1,4));
EXIT;
END IF;
END LOOP;
CLOSE cur;
RETURN;
END;

Now what exactly would be the point of putting a SELECT FOR UPDATE in an autonomous transaction?
I think OP should start by considering why he has a function with an undesirable side effect in the first place.

Query performance on same table with many DML operations

Hi all,
I am having one table with 100 rows of data. After that, i inserted, deleted, modified data so many times.
The select statement after DML operations is taking so much of time compare with before DML operations (There is no much difference in data).
If i created same table again newly with same data and fire the same select statement, it is taking less time.
My question is, is there any command like compress or re-indexing or something like that to improve the performance without creating new table again.
Thanks in advance,
Pal

Try searching "rebuilding indexes" on http://asktom.oracle.com. You will get lots of hits and many lively discussions. Certainly Tom's opinion is that re-build are very rarley required.
As far as I know, Oracle has always re-used deleted rows in indexes as long as the new row belongs in that place in the index. The only situation I am aware of where deleted rows do not get re-used is where you have a monotonically increasing key (e.g one generated by a seqence), and most, but not all, of the older rows are deleted over time.
For example if you had a table like this where seq_no is populated by a sequence and indexed
seq_no         NUMBER
processed_flag VARCHAR2(1)
trans_date     DATEand then did deletes like:
DELETE FROM t
WHERE processed_flag = 'Y' and
      trans_date <= ADD_MONTHS(sysdate, -24);that deleted the 99% of the rows in the time period that were processed, leaving only a few. Then, the index leaf blocks would be very sparsely populated (i.e. lots of deleted rows in them), but since the current seq_no values are much larger than those old ones remaining, the space could not be re-used. Any leaf block that had all of its rows deleted would be reused in another part of the index.
HTH
John

Oracle 8i array DML operations with LOB objects

Hi all,
I have a question about Oracle 8i array DML operations with LOB objects, both CLOB and BLOB. With the following statement in mind:
INSERT INTO TABLEX (COL1, COL2) VALUES (:1, :2)
where COL1 is a NUMBER and COL2 is a BLOB, I want to use OCIs array DML functionality to insert multiple records with a single statement execution. I have allocated an array of LOB locators, initialized them with OCIDescriptorAlloc(), and bound them to COL2 where mode is set to OCI_DATA_AT_EXEC and dty (IN) is set to SQLT_BLOB. It is after this where I am getting confused.
To send the LOB data, I have tried using the user-defined callback method, registering the callback function via OCIBindDynamic(). I initialize icbfps arguments as I would if I were dealing with RAW/LONG RAW data. When execution passes from the callback function, I encounter a memory exception within an Oracle dll. Where dvoid **indpp equals 0 and the object is of type RAW/LONG RAW, the function works fine. Is this not a valid methodology for CLOB/BLOB objects?
Next, I tried performing piecewise INSERTs using OCIStmtGetPieceInfo() and OCIStmtSetPieceInfo(). When using this method, I use OCILobWrite() along with a user-defined callback designed for LOBs to send LOB data to the database. Here everything works fine until I exit the user-defined LOB write callback function where an OCI_INVALID_HANDLE error is encountered. I understand that both OCILobWrite() and OCIStmtExecute() return OCI_NEED_DATA. And it does seem to me that the two statements work separately rather than in conjunction with each other. So I rather doubt this is the proper methodology.
As you can see, the correct method has evaded me. I have looked through the OCI LOB samples, but have not found any code that helps answer my question. Oracles OCI documentation has not been of much help either. So if anyone could offer some insight I would greatly appreciate it.
Chris Simms
[email protected]
null

Before 9i, you will have to first insert empty locators using EMPTY_CLOB() inlined in the SQL and using RETURNING clause to return the locator. Then use OCILobWrite to write to the locators in a streamed fashion.
From 9i, you can actually bind a long buffer to each lob position without first inserting an empty locator, retrieving it and then writing to it.
<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by CSimms:
Hi all,
I have a question about Oracle 8i array DML operations with LOB objects, both CLOB and BLOB. With the following statement in mind:
INSERT INTO TABLEX (COL1, COL2) VALUES (:1, :2)
where COL1 is a NUMBER and COL2 is a BLOB, I want to use OCIs array DML functionality to insert multiple records with a single statement execution. I have allocated an array of LOB locators, initialized them with OCIDescriptorAlloc(), and bound them to COL2 where mode is set to OCI_DATA_AT_EXEC and dty (IN) is set to SQLT_BLOB. It is after this where I am getting confused.
To send the LOB data, I have tried using the user-defined callback method, registering the callback function via OCIBindDynamic(). I initialize icbfps arguments as I would if I were dealing with RAW/LONG RAW data. When execution passes from the callback function, I encounter a memory exception within an Oracle dll. Where dvoid **indpp equals 0 and the object is of type RAW/LONG RAW, the function works fine. Is this not a valid methodology for CLOB/BLOB objects?
Next, I tried performing piecewise INSERTs using OCIStmtGetPieceInfo() and OCIStmtSetPieceInfo(). When using this method, I use OCILobWrite() along with a user-defined callback designed for LOBs to send LOB data to the database. Here everything works fine until I exit the user-defined LOB write callback function where an OCI_INVALID_HANDLE error is encountered. I understand that both OCILobWrite() and OCIStmtExecute() return OCI_NEED_DATA. And it does seem to me that the two statements work separately rather than in conjunction with each other. So I rather doubt this is the proper methodology.
As you can see, the correct method has evaded me. I have looked through the OCI LOB samples, but have not found any code that helps answer my question. Oracles OCI documentation has not been of much help either. So if anyone could offer some insight I would greatly appreciate it.
Chris Simms
[email protected]
<HR></BLOCKQUOTE>
null

How to find last DML operation in oracle ADF

how to find last DML operation in oracle ADF
Please help me
Thanks
Damby

In the base EntityIml class, just override doDML() method as I said.
(see http://docs.oracle.com/cd/E16162_01/web.1112/e16182/appendix_mostcommon.htm
"Methods for Creating Your Own Layer of Framework Base Classes")
So, put a some flag in the session.
You should not call doDML() method in backing bean, it will be called by framework.
In the backing bean, you only have to get that information from the session, as follows:
String last_dml_op = (String)ADFContext.getCurrent().getSessionScope().get("last_dml_op");And voila...

How to know which DML operation is taking place on a table within a procedu

Hii all,
My DB Version
SQL> select *
2 from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE    10.2.0.4.0      Production
TNS for Solaris: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - ProductionHow to find what DML Operation is taking place on a particular table within a procedure??
For suppose I've the below procedure
create table r_dummy
name varchar2(4000),
emp_id number
Create or replace procedure r_dummy_proc
p_name          in     varchar2,
p_emp_id     in     number
is
Begin
          Update r_dummy
          set name = p_name
          where emp_id = p_emp_id;
          if sql%rowcount > 1 then
               dbms_output.put_line('Successfully updated employee name');
          end if;
End;Here from the code I can identify that an update operation is taking place on table 'R_DUMMY'
But how to find that without actually viewing the code?? I've hundreds of procedures in my DB and would like to find what DML is taking place on which table and in which procedure.
Please help with some suggestions.

And here is the solution
with t as
select distinct name,type,text,line
from user_source s
where regexp_like(s.text,'cp_ca_dtls','i')
x as
select name,line,text
from
select name,case when (regexp_instr(text,'(update)|(insert)|(delete)',1,1,1,'i') >0) and regexp_instr(ld,'CP_CA_DTLS',1,1,1,'i') >0
         then line
         else null
         end as line,text
from
Select   name,text,line,lead(text) over(partition by name order by line) ld
from user_source
where name in
      select distinct name
      from user_source
      where upper(text) like '%CP_CA_DTLS%'
order by 1 nulls last
)where line is not null
select name,line,text
from t t1
where regexp_instr(text,'(update)|(insert)|(delete)',1,1,1,'i') >0
and exists
     select 1
     from t t2
     where t1.name = t2.name
        and t1.type = t2.type
        and t1.line = t2.line
union
select name,line,text
from x

How to write DML operation in a function

Hi
Its very urgent for me.
I am writing DML operation directly in a function and is being called from select statement, it is getting error as "DML Operations cannot be performed inside a query".
How to write a DML operation inside a function.
My objective is to call that function from select statement.
Please help me out.
Thankd

No no no. You're committing after each row! soany
other session running the same query will see the
changes you're making. Your session will equallysee
changes caused by running this query in those
sessions.Other session, yes, but current session will only see
the changes once it has completed the current
statement. Otherwise my "rn" column would not have
gone up sequentially in the above example. it would
have gone
1st row rn = 1 (all rows get updated by 1:-
2,3,4,5,6,7,8,9,10,11)
2nd row rn = 3 (all rows get update by 1:-
3,4,5,6,7,8,9,10,11,12)
3rd row rn = 5 (all rows get update by 1:-
4,5,6,7,8,9,10,11,12,13)
4th row rn = 7 (all rows get update by 1:-
5,6,7,8,9,10,11,12,13,14)
5th row rn = 9 (all rows get update by 1:-
6,7,8,9,10,11,12,13,14,15)
6th row rn = 11 (all rows get update by 1:-
7,8,9,10,11,12,13,14,15,16)
7th row rn = 13 (all rows get update by 1:-
8,9,10,11,12,13,14,15,16,17)
8th row rn = 15 (all rows get update by 1:-
9,10,11,12,13,14,15,16,17,18)
9th row rn = 17 (all rows get update by 1:-
10,11,12,13,14,15,16,17,18,19)
10th row rn = 19 (all rows get update by 1:-
11,12,13,14,15,16,17,18,19,20)
So the fact the commit happens each time the rows get
updated, isn't effecting the currently running select
statement.
No, actually you DO see the other session changes. This is because it is AUTONOMOUS transaction, and this a function.
Test by adding:
create or replace function incvals return number as
pragma autonomous_transaction;
v_val number;
begin
update t set rn = rn + 1;
select max(rn) into v_val from t;
dbms_lock.sleep(1); --add this line
commit;
return v_val;
end;
And test in two sessions.
You will NOT get sequential ascending.
>
Think about the effect of two parallel sessionsboth
running this query at the same time, and ask isthis
sensible?Gawd, no, of course not. Like I said, I'd never use
this sort of thing myself. I'm just wondering what
on earth the OP is trying to achieve.
:)Glad to hear it.

DML operations not getting logged

Hi,
I am wanting to collect the stats on the tables on my DB for which I want the DML activities to be populated in the USER_TAB_MODIFICATIONS table. The monitoring on all the tables in the schema has been set to ON. But i still see no records inside the USER_TAB or DBA_TAB_MODIFICATIONS table.
I can always try executing the dbms_stats.flush_database_monitoring_info for getting this table populated. But I wanted to first know why is this table not getting populated thru the DB processes? And incase any DB level setting is preventing it from getting inserted in the USER_TAB_MODIFICATIONS table, I am not sure if executing the dbms_stats.flush_database_monitoring_info would help me.
Kindly advice.
Thanks in advance.

CrazyAnie wrote:
Hi,
Yeah, I know there is a time lapse (approx 3 hrs) between the DML operations on the table and the time when they are logged in the DB. We waited for around a day to get these value populated in the DBA_TAB_MODIFICATIONS. But we are still not able to see any values in this table.
I am not able to guess the reason behind this. Kindly help.
Shall I try executing the flush_db_monitoring info to get these values?refer Thread: user_tab_modifications only updated by gather_stats_job?
user_tab_modifications only updated by gather_stats_job?

DML operations improves perfomance on a Partioned Table?

Hi
We have a simple table (non-partitioned) and we do normal DML operations on it. If we convert that table into 5 partitions then does DML performance improves on it by 5times? To be very specific will READ and WRITES on table will improve? if YES than to which extent. *(considering Table size in TB)*. DB is 11g R2.
Regards
Edited by: 905133 on Dec 29, 2011 10:08 PM
Edited by: 905133 on Dec 29, 2011 10:33 PM

CKLP,
I populated a table in my test environment called test with 10 columns and 7 million records.
its structure is
col1..col5 are of data type number and are locally indexed
col6..col 9 are of data type number (not indexed)
col 10 is of data type Date
table is partitioned on col10 by Range. (7 partition for a week (1 partition/day), 1million records in a partition)
when i inserted 7 million records (i.e one million record/partition). Avg insertion time/partition was 7.5 min. (I inserted records individually in a partition)
Then I created another table test2 with same no. of columns Indexed and equal amount of records. But increased the no. of partitions. 4 partitions/day 28 partitions for week
When I inserted 7 million records (one million records/ 4 partitions), Avg insertion Time was 7.1 min. (I inserted records individually in these 4 partition at a single time)
Insert into test values(...) format was used. and now i know Parallelism can't be used on this format.
So the point to discuss here is "why did not I achieve a better Insertion Time when i divided a daily partition to 4 partition per day". OR " How can i improve insertion time in such scenarios"
Oracle DB 11g R2, OS Linux 5, Sun Server x4200 with shared storage.

Ref:Logging the DML operations on a schema

Hello,
I want to log the DML operations on our Master Schema(This schema is accessed by 4-6 applications apart from there own application schemas). I want to log the DML operations done by x.application. Is there any easy way to do it. One solutions is writting the triggers on each table of Master schema and inserting the transactions into audit_schema(it is replica of master schema). Is there any other way to do it. Any solution for this issue is appreciated. Thanks in advance.

Is there any other way to do itEnable auditing, see the security guide:
http://download.oracle.com/docs/cd/B19306_01/network.102/b14266/toc.htm
http://download.oracle.com/docs/cd/B19306_01/network.102/b14266/auditing.htm#i1008289
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/security.htm#sthref2929

EHCC AND DML OPERATIONS

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