Tuning 7.2 TB BW database

Hi all,
We have BW 7.0 on oracle 10.2.0.2 with sun solaris 5.9. The DB size is
7.2 TB and PSAPODSD is occupying 4.8 TB of total space.
Every month PSAPODSD is growing by 150 GB, Please suggest how to tune
the BW database. Other than housekeeping jobs any special BW jobs to be
run periodically to clean any data.
I got conformation from BW team that every week PSA deletion jobs are scheduled .
We have daily Incremental load from R/3 4.6c and Weekly [Friday] full
load from R/3 , Please suggest any temp tables which will be used
during data load to be deleted or any recommendations on cleanup the
BW database.
Environment:
Oracle SGA : 10 GB
Thanks,
Subhash.G

Check your change logs and the temporary tables used by the transfer structure.
Change logs will net you a lot of space... - decide on the amount of data you want to hold and remove additonal data from change logs.
Aggergates :
Check unused aggregates from
a. Statistics
b. BW Early Watch reports
Delete / deactivate the same.
COmpress cubes wherever possible.

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IIR 2.8.0.7 performance tuning suggestions / documents for Oracle 11?

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Hi Varad,
Well, Oracle Metalink actually got it fixed for me! Got to give them credit.
I ran the 1st bit of SQL they sent me and it fixed it so I think it was only cosmetic. I've enclosed all of their response in case others may find themselves in similar situation.
Thanks again for YOUR help too.
Perry
==========================================================
1. Do you see any invalid objects in the database?
2. Please update the SR with the output of running the commands below
1.Connect as SYS.
set serveroutput on (This will let you see if any check fails)
exec validate_apex; (If your version is 2.0 or above)
If all are fine, the registry should be changed to VALID for APEX and you should see the following
message:
PL/SQL procedure successfully completed.
Note : The procedure validate_apex should always complete successfully.
With serveroutput on, it should show why Application Express is listed as invalid.It should show output like:
FAILED CHECK FOR <<obect_name>>
Or
FAILED EXISTENCE CHECK FOR <<object_name>>

DB_BLOCK_BUFFERS PARAMETER TUNING(ORACLE7)

제품 : ORACLE SERVER
작성날짜 : 2002-04-12
DB_BLOCK_BUFFERS PARAMETER TUNING(ORACLE7)
==========================================
Purpose
Oracle7 version의 database에서 db block buffer의 값이 적당한 지를
알아보고 Tuning 하는 방법을 알아보자.
Explanation
1. DB_BLOCK_BUFFERS parameter
(1) SGA 내 메모리에 캐쉬되는 데이타베이스 블럭의 수
(2) SGA 사이즈와 데이타베이스 성능을 결정하는 가장 중요한 요소이다.
(3) 높은 값을 갖게 되면 해당 블럭을 메모리에서 찾게 되는 빈도가 많아지기
때문에 디스크 입출력을 줄일 수 있지만, 보다 많은 메모리를 소모하게 된다.
2. 적정한 값 찾기
(1) 다음의 SQL문을 수행시켜 ratio 필드의 평균 값이 92% 이상이어야 한다.
- DBMS가 STARTUP 후부터 현재까지의 누적치를 보여준다.
- 현재의 HIT RATIO를 보려면 두 번 수행하여 차액을 갖고 계산한다.
rem
rem connect as system user id
rem
col logical_reads format 999,999,999,999
col physical_reads format 999,999,999,999
col physical_writes format 999,999,999,999
select a.value + b.value logical_reads,
c.value physical_reads,
round(100*(a.value+b.value-c.value)/(a.value+b.value),2) ratio,
d.value physical_writes
from sys.v_$sysstat a,
sys.v_$sysstat b,
sys.v_$sysstat c,
sys.v_$sysstat d
where a.statistic# = 37 -- db block gets
and b.statistic# = 38 -- consistent gets
and c.statistic# = 39 -- physical reads
and d.statistic# = 40 -- physical writes
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DB_BLOCK_LRU_EXTENDED_STATISTICS = 1000
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cache hit가 증가하는 값을 알아보기 위함이다.
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select 200*trunc(indx/200)+1 || ' to ' ||
200*(trunc(indx/200)+1) "Interval",
sum(count) "Additional Buffer Cache Hits"
from sys.x$kcbrbh
group by trunc(indx/200)
Interval Additional Buffer Cache Hits
1 to 200 300
201 to 400 250
401 to 600 180
601 to 800 80
801 to 1000 50
(3) 많다고 생각될 때 init$ORACLE_SID.ora 화일에서 다음을 고려한다.
DB_BLOCK_LRU_STATISTICS=TRUE
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- 아래의 경우는 1 부터 600 까지의 버퍼만 사용되고 있음을 알 수 있다.
col Interval format a20
prompt Number of Losing Cache Hits (LCH)
select 200*trunc(indx/200)+1 || ' to ' ||
200*(trunc(indx/200)+1) "Interval",
sum(count) "Losing Buffer Cache Hits"
from sys.x$kcbcbh
group by trunc(indx/200)
Interval Losing Buffer Cache Hits
1 to 200 3915
201 to 400 434
401 to 600 199
601 to 800 0
9801 to 10000 0

To MMM, the hit ratio is currently 100%. We want to lower that to about 95% and save some RAM at the expense of some slower queries.
To KM, no we are not using any stats_pack utilities.
Can anyone tell me the init.ora parameter to set in Oracle 8.1.7.4 to gets measures into the above table?

[OCP exam] doubt about Automatic SQL Tuning Advisor

Hi,
Sorry for my poor english.
I am currently preparing for the OCP 11g exam.
For that, I have bought some training tools to help me prepare the exam.
But, in the chapter related to the SQL tuning advisor, some explanation really confuse me .
Extract :
<<
the SQL automatic tuning job runs every night during the maintenance window.
By default, the job makes SQL profile recommendations, tests them, and automatically implements them if they provide better performance improvement)
>>
I was persuaded it was the opposite.
I check several databases/documentation, and it's seems to be always the opposite.
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But the exam is validated on oracle 11.2.0.1, and I only have 11.2.0.2/11.2.0.3 db available.
So may be oracle changed the value of the default parameter in the new releases.
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I would rather accept what is in the documentation:
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"If automatic implementation of SQL profiles is enabled (the default is disabled), then the database implements any SQL profiles that promise a great performance benefit. The implementation occurs at tuning time so that the database can immediately benefit from the new plan. You can enable or disable automatic implementation by using the SET_AUTO_TUNING_TASK_PARAMETER API to set the ACCEPT_SQL_PROFILES parameter." DBMS_AUTO_SQLTUNE

DBA+Sql tuning

hello everyone i am an oracle developer working in oracle Forms and reports i have a keen interest in this database and would like to become a DBA.. pls suggest me some good books which can teach me about the whole oracle architecture and the other details.
Apart from that i want to study Sql tuning too for oracle 10g database.. please suggest me some good books regarding both these two topics.

Hi,
Apart from that i want to study Sql tuning too for oracle 10g database.. please suggest me some good books regarding both these two topics.Apart from Oracle Documentation, there are many good references available in the market, go through the review and check the table of contents before deciding which book(s) you want to go with.
Oracle 10g DBA
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=Oracle+10g+DBA
Oracle SQL Tuning
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=Oracle+SQL+Tuning
Regards,
Hussein

10g Database Console

Hi
Could anyone advise please, if there is a way to configure the 10g database web console, to enable one to log into other databases? i.e. in a similar fashion to the way the java enterprise manager works
Thanks
Kez

The grid control is a separate download. The console that comes with the database is tuned for hooking to that database alone.
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Can anybody recommend useful performance and tuning books. I plan to take the 12c perf tune beta on March 21st

Can anybody recommend any useful performance and tuning books.
I should probably limit my search to 11g or higher.
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Thanks Roger

Hi,
I will review your review.
I do see this Oracle 12c book at Amazon written over a year ago.
Its not a certificaiton book.
I also did take the course at Oracle for 11g performance and tuning.
Amazon book:
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Thanks Roger

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Hi
I dont have much knowledge about the performance tuning in the oracle database and in the oracle applications .
please suggest some books which will provide me good knowledege about the performance tuning in the oracle database and in the oracle applications.i dont have basic knowledge in tuning ( something thing like resolving locks, tuning slow running applications)
kindly suggest me some books related to the performance tuning aspect in the oracle database in oracle applications 11.5.10.2
Regards
Aram

Aram,
Please see your old threads (you have like 10 threads which discuss the same topic).
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http://forums.oracle.com/forums/search.jspa?threadID=&q=tuning&objID=c84&dateRange=all&userID=706030&numResults=15&rankBy=10001
Regards,
Hussein

Managing remote databases through OEM

i have created repository & set preferred credentials in OEM which worked well for local database to be managed through Management server but when i connected 2 more remote databases which were discovered nodes and one more manually connected, i unable to connect and getting the following messages when index tuning.
XP-21016: A database error has occurred:
/* OracleOEM */ CREATE TABLE VDK_TMP_RULE_JOURNAL_1502( VDK_STYLE NUMBER,VDK_SEGMENT_ID NUMBER,VDK_TEXT LONG,VDK_MARGIN NUMBER,VDK_ENTRY_TIME DATE)
ORA-00955: name is already used by an existing object
Please help me how to connect to the repository of remote databases.

Hi.,
You are not discover the new database in name of already existing Database.So you delete the existing node and then perform the discover new node.
Bye..

SQL tuning guide

Hello Gurus,
We have 10.2.04 RAC database running in production.The application does lot of DML.I need to tune query regularly.
Could anybody sugggest a good book for Oracle SQl tuning.
Thanks and Regards,
jitender
Edited by: user10552550 on Feb 22, 2010 5:53 AM

The Oracle Database Performance Tuning Guide in the Oracle Database documentation library has a lot of information. Several chapters have "SQL" in their titles, including "SQL Tuning Overview".
However, if you're looking for third-party books, I don't know know enough about them to recommend one versus another.

SQL Tuning Advisor on a specific SQL statement

Hi all,
How can I used SQL Tuning Advisor in Oracle EM Database Control to tune a specific SQL statement; i.e. the statement is not any of: Top SQL, SQL Tuning Sets, Snapshots Preserved Snapshot Sets.
Thanks in advance,
Ahmed B.

Hi,
You can use either the automatic SQL tuning features that are accessible from Enterprise Manager Database Console on the "Advisor Central" page or trough SQL*PLUS using the DBMS_SQLTUNE pakage:
-- creating the tuning task
set serveroutput on
declare
l_sql_tune_task_id varchar2(100);
begin
l_sql_tune_task_id := dbms_sqltune.create_tuning_task (
                          sql_id      => '<your_sql_id>',
                          scope       => dbms_sqltune.scope_comprehensive,
                          time_limit => 60,
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                          description => 'tuning task for statement your_sql_id.');
dbms_output.put_line('l_sql_tune_task_id: ' || l_sql_tune_task_id);
end;
-- executing the tuning task
exec dbms_sqltune.execute_tuning_task(task_name => '<your_tuning_task_name>');
-- displaying the recommendations
set long 100000;
set longchunksize 1000
set pagesize 10000
set linesize 100
select dbms_sqltune.report_tuning_task('<your_tuning_task_name>') as recommendations from dual;For more information, take a look at link provided by Jaffy.
Cheers
Legatti

RAT - SQL Tuning Set from 9i trace in wrong order

Hi together
I want to test the impact of some staments on 9.2.0.8 in 11g with Real Application Testing, but the order in the tuning set seems to b wrong (not in the traced order). So i made a small Test Script who is creating a Table, insert Data with a loop and select all.
Steps :
* 9i enable trace level 4
* 9i run the script
* 9i stop the trace
* transfer to 11g
* make an sql tunnig set
* running in the Performance Analyzer Workflow
The first run Oracle makes performance datas from the trace files. In the second run I want to execute the statements from the tuning set in the 11g database. The traced Schema from 9i exists.
In the report after the second run I see the failure that the insert and select statement is not allowed. When i take a look in the SQL Tuning Set i see that the select and insert will be played before the create table ! Also on the view DBA_SQLSET_STATEMENTS.
Is there a way to get the correct order in the SQL Tuning Set like the statement order (create before insert,select) ? Or can Oracle not handle DDL-Statements in the trace ?
Regards Martin

Hi together
I want to test the impact of some staments on 9.2.0.8 in 11g with Real Application Testing, but the order in the tuning set seems to b wrong (not in the traced order). So i made a small Test Script who is creating a Table, insert Data with a loop and select all.
Steps :
* 9i enable trace level 4
* 9i run the script
* 9i stop the trace
* transfer to 11g
* make an sql tunnig set
* running in the Performance Analyzer Workflow
The first run Oracle makes performance datas from the trace files. In the second run I want to execute the statements from the tuning set in the 11g database. The traced Schema from 9i exists.
In the report after the second run I see the failure that the insert and select statement is not allowed. When i take a look in the SQL Tuning Set i see that the select and insert will be played before the create table ! Also on the view DBA_SQLSET_STATEMENTS.
Is there a way to get the correct order in the SQL Tuning Set like the statement order (create before insert,select) ? Or can Oracle not handle DDL-Statements in the trace ?
Regards Martin

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