Check the database ( Performance , tuning , . . . . . . . , etc )

Dears,,
If i have running database and i need to make check health for it for performance , tuning , . . . , etc
Is there any steps or advisors or documentations to go ahead with them enable me to check the database health.
Thanks & Regards,,

Eng.Mohammed wrote:
Dears,,
If i have running database and i need to make check health for it for performance , tuning , . . . , etc
Is there any steps or advisors or documentations to go ahead with them enable me to check the database health.
Thanks & Regards,,
One way to check for performance issues is to see if your telephone is ringing. If no one is calling to complain, then you don't have any problems.
I'm only half joking. Which means I am half serious. While you shouldn't take a completely cavalier attitude toward performance, neither do you want to fall victim to Compulsive Tuning Disorder.
Start with the 2-Day DBA manual. Follow up with the tuning guide. Both at tahiti.oracle.com
And remember, no matter how much effort you put into tuning, there will always be a "Top Five" wait events. Is it worth 40 man hours of effort to get a 75% reduction in average response time? Really? Even if the average response time is already 0.5 seconds? Is the user going to be able to perceive that 0.38 seconds improvement?

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Oracle 11 G database performance tuning

How to indexing the oracle 11G database?
Thanks in advance.

Your question is like if you ask "Tell me how to fix a car". As you know people spend years learning how to fix different problems with cars; the same applies to database performance tuning. There is no way to answer this question in one post. Please ask a more specific question in an apropriate (database related) forum.
cheers

Will Result Cache improve the database performance in 11g? what is the max size of Result Cache?

Will Result Cache improve the database performance in 11g? what is the max size of Result Cache?

Thanks for convincing me I really need a new laptop...
SQL> select /*+ result_cache */ count(*) from emp,emp,emp,emp,emp,emp,emp;
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105413504
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SQL> select /*+ result_cache */ count(*) from emp,emp,emp,emp,emp,emp,emp;
COUNT(*)
105413504
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SQL> select /*+ result_cache */ count(*) from emp,emp,emp,emp,emp,emp,emp;
COUNT(*)
105413504
Elapsed: 00:00:00.01
SQL> select count(*) from emp,emp,emp,emp,emp,emp,emp;
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105413504
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SQL> select count(*) from emp,emp,emp,emp,emp,emp,emp;
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Message was edited by: Hoek
The result cache seems to have lagged a bit for the first hintless query..

Does recompiling procedure improve the database performance???????

One of my friends working on mssql told me that recreating of procedures could improve the database performance. If you have created the procedure and recreated it after insertion of huge volume of data.
Is it true. If so how?

I think so too but he said that in his microsoft certified course told that it could improve the performance.
He told me that the select statements prevously used uses the old statistic but after recreating it uses the new statistic.

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The virtual machine software vendor must have certified and provided some performance figures like running Oracle on our VM would have a performance hit of n%. VMWare has such a figure published (8% if I recall correctly).
Besides, the load on physical server, apart from the virtual machine running, would also have the impact on performance.
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Any tool to help checking the database is in line with the 2NF

Is there any tool to help checking the database design is in line with the 2NF (second normal form), Thanks.

Hi,
Is this table in 2nd normal form?
CREATE TABLE     orders
(       order_id     NUMBER (10)     PRIMARY KEY
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);How can you tell?
How would you expect some tool to tell?
If you willing to even make a guess, it's only because you know what "order". "company" and "customer" probably mean in this context.
There are queries other methods you could use to detect tables that might not be in second normal form. Fort example, you could assign a number (0-100) to each table, 0 meaning it seems to be in second normal form, 100 means that it has all the traits you expect from a table that is not in second normal form, and then list the 20 tables with the highest scores to check.
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How to check the database connection using OCI

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Hi,
If you are reworking the application can you not build in the functionality to re-establish a connection if there is a failure? That is, a submission from the application server to the database server detects a failure, etc. and then re-establishes the connection. If you need a more frequent check than during a user-initiated roundtrip, you may be best served by using the "dummy query" technique on some time interval.
From my understanding using HA Event Notification would require a RAC database (plus a multi-threaded application and services correctly configured on the RAC-side).
In the documentation I see this:
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14250/oci09adv.htm#sthref1495
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In any case, this has the potential to be a bit complicated...
Regards,
Mark

Database performance tuning

i have a very large database consisting of around 300,000,000 records with 38 columns in each record.
i need help in tuning the database so that query results don't take more than a few seconds.
the data is the log of events occuring in the SMSC server.
there are about 10,000,000 events daily.
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Hi
Thanks for your replies.
The table structure is as follows :
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LOG_TYPE NUMBER
SUC_INDICATOR NUMBER
ORIG_IW_TYPE NUMBER
ORIG_TYPE NUMBER
ORIG_ADDR VARCHAR2(21)
ORIG_ADDR_LEN NUMBER
DEST_IW_TYPE NUMBER
DEST_TYPE NUMBER
DEST_ADDR VARCHAR2(21)
DEST_ADDR_LEN NUMBER
SMS_CENTRE VARCHAR2(21)
INCOMING_TIME DATE
TIME DATE
ERROR_CAUSE NUMBER
ERROR_ORIGINATOR NUMBER
NO_OF_ATTEMPTS NUMBER
TARIFF_CLASS NUMBER
MSG_LEN NUMBER
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SR_REQUEST NUMBER
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SEQ_NR NUMBER
SP_MSG_IND NUMBER
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ACCESS_METHOD NUMBER
PRIORITY NUMBER
SENDER_CHG_TYPE NUMBER
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SENDER_PREPAID_STATUS NUMBER
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ORIG_IMSI VARCHAR2(21)
CONSO_MSG VARCHAR2(10)
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select statement
partition range(iterator)
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I tried to make this more readable but the white spaces are getting removed from the posted message.
looking forward to a quick response

Database performance tuning Question

Please,
The top wait event having all the time when tuning, oracle database is the following.
enq: TX - row lock contention
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The first thing to do is check the underlying reason. If you query v$session_wait_history or v$lock when you spot a lock appearing, you can check if the request is for mode 4 or mode 6.
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http://jonathanlewis.wordpress.com
http:/www.jlcomp.demon.co.uk

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Agata,
The full retail should be white with a snow leopard on it but if you ordered from the on-line store you should be fine. If it is having problems booting while holding the C key, try restarting the computer but this time hold the Option key.
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VIkram

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Thanks in advance

try to connect to the database. if it is possible, the database exists - if not - well there may be a number of reasons, but if your database URL is correct, your network is ok and your database engine is running, the database is not existent.

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All,
I wanted to know in which normal form(1NF,2NF,BCNF) my database is working. How to find that...Suggestions Please .

Tippu, I will agree with pretty much everything that the other posters have already posted.
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Book for 1Z0-033 Oracle9i Database: Performance Tuning

Hi
are there are any recommended books for 1Z0-033 exam
regards
kedar

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Check the database ( Performance , tuning , . . . . . . . , etc )

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