Tunning Libary cache in oracle 9i

Hey guys !
I need to clarify about the tuning technology related of library cache ! This is one of confusion which is always seems a big stuck for me .. Please help me through some instructions regarding the same ..
Thanks for any help ...

If you could be more specific in your questions, you might get accurate answers.
Based on what you have posted, this is what is available in Oracle documentation.
http://download.oracle.com/docs/cd/B10501_01/server.920/a96533/memory.htm#33036
http://download.oracle.com/docs/cd/B10501_01/server.920/a96533/sqlviews.htm#18345

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Please see:
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1. What difference between operating system buffer cache and oracle buffer cache?
2. In what case, oracle is using oracle buffer cache? in what case, oracle doesn't use buffer cache instead of using OS buffer cache.
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Appreciate any help.
S.

ski123 wrote:
1. What difference between operating system buffer cache and oracle buffer cache?
2. In what case, oracle is using oracle buffer cache? in what case, oracle doesn't use buffer cache instead of using OS buffer cache.
I am confused about this concept.
Appreciate any help.
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Hi,
i want to purge the bi server cache an oracle bi event table.
i created an table like:
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UPDATE_TYPE INTEGER default 1 not null,
UPDATE_TIME DATE default SYSDATE not null,
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COMMIT
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2010-02-19 11:49:56
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2010-02-19 11:49:56
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From the Manual :-
SchemaName
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hope this helps

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hi
can anyone please help me in tunning a particular table in oracle which has millions of Record
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What's the Oracle version?
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Shen Jie,
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Hi All,
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Some links:
http://www.computerworld.com/s/article/101591/Looking_Beyond_the_Big_Three
http://labsoftnews.typepad.com/lab_soft_news/2010/05/persistence-of-the-mumps-programming-language-in-healthcare.html
http://labsoftnews.typepad.com/lab_soft_news/2010/10/more-on-mumps.html
http://www.faqs.org/faqs/m-technology-faq/part1/
http://www.cs.uni.edu/~okane/source/ISR/isr.html#ex01
http://www.cachewiki.org/index.php/About
http://bytes.com/topic/oracle/answers/65655-comments-intersystems-cache-database-platform
http://dbaspot.com/forums/object-database-technologies/196842-help-problems-intersystems-cache.html
http://www.intersystems.com/cache/whitepapers/pdf/BestKeptSecret.pdf
http://www.outoftheslipstream.com/node/124
http://www.dbms2.com/2010/01/15/intersystems-cache-highlights/#more-1400
Edited by: feersum_endjinn on 15-Apr-2011 07:28
Edited by: feersum_endjinn on 15-Apr-2011 07:31

Oh, you mean [url http://isabel.la/?q=node/24]DSM-11? ;)
I think if you look around you will find Oracle is used very heavily in the health care field. While there is nothing wrong with software written for the ages, surely more should be, trying to keep stuff written that long ago creeping along is just way too expensive, it has too many implicit assumptions about how systems should be designed and the relative costs of the various trade-offs. Of course, some of the [url http://web.signonsandiego.com/news/2011/feb/20/wireless-device-would-give-doctors-access-real-tim/]newest stuff is being designed haphazardly, which has a great deal of risk. Add in modern legislative issues and you have a real mess.
Claims of 4GL or object-oriented development being faster are misleading. Two things wind up happening: compromises are made as technology develops, and maintenance becomes increasingly difficult because it is too easy to change things. In addition, design philosophies spring up that have strange ideas about how to deconstruct a large system into small component parts. As the others noted, we periodically see this new paradigm baloney, and it goes nowhere.
The speed of various paradigms can be better than a pure relational approach - see [url http://kevinclosson.wordpress.com/kevin-closson-index/exadata-posts/]Exadata, for one - but they inevitably need a very specific approach to very specific problems. It gets to the point where vendors require very specific hardware and software requirements to make it work - see [url http://kerryosborne.oracle-guy.com/2010/08/running-oracle-exadata-v2-on-dell-hardware/]Exadata, for one.
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Amazon is a bit better example, if you happen to be an Amazon size company. Note that the actual business runs on Oracle, and was able to grow as it did by using Oracle. All that "eventually transactionally consistent" stuff has to end up somewhere. As for simpledb, what real use is being able to change your data model on the fly? You need to fix your modeling skills!
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Hi,
i am reading the following article and trying to reproduce same set of statements to learn about function result cache.
http://www.oracle.com/technology/oramag/oracle/07-sep/o57asktom.html
Details about my output:
SQL> create or replace
function not_cached
( p_owner in varchar2 )
return number
as
l_cnt number;
begin
select count(*)
into l_cnt
from t
where owner = p_owner;
sys.dbms_lock.sleep(1);
return l_cnt;
end;
Function created.
Elapsed: 00:00:00.13
SQL> create or replace
function cached
( p_owner in varchar2 )
return number
result_cache
relies_on(T)
as
l_cnt number;
begin
select count(*)
into l_cnt
from t
where owner = p_owner;
dbms_lock.sleep(1);
return l_cnt;
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Elapsed: 00:00:00.08
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PL/SQL procedure successfully completed.
Elapsed: 00:00:01.06
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PL/SQL procedure successfully completed.
Elapsed: 00:00:01.01
SQL> SQL> exec dbms_output.put_line( not_cached( 'SCOTT' ) );
PL/SQL procedure successfully completed.
Elapsed: 00:00:01.02
SQL> SQL> set serveroutput on
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0
PL/SQL procedure successfully completed.
Elapsed: 00:00:01.02
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0
PL/SQL procedure successfully completed.
Elapsed: 00:00:01.02
SQL> SQL> exec dbms_output.put_line( cached( 'SCOTT' ) );
0
PL/SQL procedure successfully completed.
Elapsed: 00:00:01.02
SQL> SQL> exec dbms_output.put_line( cached( 'SCOTT' ) );
0
PL/SQL procedure successfully completed.
SQL> exec dbms_output.put_line( cached( 'SCOTT' ) );
0
PL/SQL procedure successfully completed.
Elapsed: 00:00:01.01
I am supposed to get the results quickly for "cached" call. However, i still dont see any change in the response time. May i know what i am missing here?
Thank you
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Try to play with
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http://download.oracle.com/docs/cd/B28359_01/server.111/b28320/initparams206.htm#REFRN10272
RESULT_CACHE_MAX_RESULT
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Hi,
Our Application runs on Oracle10g App Server,
When it tried to start WebCache using the command
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it shows the error...
opmn id=oracle10g:6200
no enabled components for this request
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When i tried opmnctl status., it shows
------------------------------------------------+---------
ias-component | process-type | pid | status
------------------------------------------------+---------
HTTP_Server | HTTP_Server | 7276 | Alive
LogLoader | logloaderd | N/A | Down
dcm-daemon | dcm-daemon | N/A | Down
OC4J | home | 7684 | Alive
OC4J | rhs | N/A | Down
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OC4J | insta_test_apr_02 | 7100 | Alive
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Plz Help me over this.,
Regards.,
Deepak.C

Hi.,
Thanks again !!!
Yes, My Oracle HTTP Server is listening on port 80.
I am not clear, may i know why should the ports be changed for the request to go through Web Cache ???
Can i assign port 80 for Web Cache and 7778 for HTTP Server ?
Also In Oracle Enterprise Manager, Web Cache is not available...
home, HTTP Server, management alll these are there...
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Cache in Oracle 10g

Hi,
I must read many rows with my database and keep all rows in cache. Is that posible in Oracle 10g?? I must do that because I must accelerate database. Until now I used cache GigaSpaces..

Hi,
There are few points to consider before implementing this idea.
1. What is type of database you are using? Is it OLTP or DSS or mixed?
2. Think of a scenario if you cache blocks in buffer, and any of then gets durty. In Oracle 10g. Parallel read will do Direct path read and before this it have to do checkpoint for the segment !!!!. So you may end up in issues.
3. 10g CBO is intelligent to optimize path using are your blocks in there in memory or it has to read the disk and then estimate the cost. But this requires some undocumented paraters to be set.
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In 11.2.0.1.0 documentation it was referencing some views (I totally don't remember those views names) and said those will be available in 11.2.0.2.0.
Is anyone know about this?
Thanks in advance.

user2486753 wrote:
Though oracle doc doesn't say about AUTO it is still accepts that value and caches the result of the SQL query if you add /*+ result cache */ hint to the SQL.
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HTH
Aman....

How to tune the performance of Oracle SQL/XML query?

Hi all,
I am running Oracle 9i and like to run the following Oracle SQL/XML query. It takes about 3+ hour and still not finish. If I get rid all the XML stuffs it only take minutes to run. Does anybody know how to what's the reason of this slow and how to tune it?
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FROM LINEITEM
WHERE LINEITEM.L_ORDERKEY = ORDERS.O_ORDERKEY)
FROM ORDERS
WHERE ORDERS.O_CUSTKEY = CUSTOMER.C_CUSTKEY)
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ajallen wrote:
Why not something more like
SELECT *
FROM fact1 l,
FULL OUTER JOIN fact1 d
ON l.company = d.company
AND l.transactiontypeid = 1
AND d.transactiontypeid = 2;
Because this is not an equivalent of the original query.
drop table t1 cascade constraints purge;
drop table t2 cascade constraints purge;
create table t1 as select rownum t1_id from dual connect by level <= 5;
create table t2 as select rownum+2 t2_id from dual connect by level <= 5;
select * from (select * from t1 where t1_id > 2) t1 full outer join t2 on (t1_id = t2_id);
select * from t1 full outer join t2 on (t1_id = t2_id and t1_id > 2);
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         3          3
         4          4
         5          5
                    6
                    7
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         4          4
         5          5
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Tunning Libary cache in oracle 9i

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