As a number of Oracle Connections created - Performance Issue

Hello,
We are using Oracle 9i as a backend and VB 6.0 as Frontend. For one client one connection will be opened in the Database Server, if 200 clients open the application then 200 connections will be opened in the Database Server, due to that performance issue is raising.
We are doing: If the frontend application is not in use for 10-minutes then the connection is closed and at the same time front-end application is also terminated or if the Client terminates the application the connection is closed in the Server.
Eventhought if 200-Clients connect the Server only 4 to 5 Clients send a request to the Server for retriving or for saving the data.
I want to Open a fixed number of connections in the DataBase Server eg., around 10-connections, and i want to use this 10 connections for 200 clients.
At First 10 Connections are opened and 10 Clients are using this 10 connections, among 10 Clients 1 released the database connection after finishing the Job and if 11'th Client opens then this released connection as to be used without opening a new connection, in the same way if some of the connections from 9 get free and if any other clients open application then this connections which are free as to be used for opening the application or else for doing any transaction. So, that the number of connection to be create can be redused.
Please give me the suggestion how to make use the released connection for doing the transaction or else for opening the application.
Thanking U with Regards,
Sravan,
Hyderabad.

As Satish mentioned, Shared Server can be a good solution, but it would also be worth telling us , how did you quantify this thing that due to the number of connections, you have a performance issue? 200 is not that big number I guess. What's the o/s , exact database version and the system details with database details? Also if you have statspack report, post that too over here.
HTH
Aman....

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CREATE TABLE AVN_WRK_F_RENEWAL_TRANS_T
"PKSRCSYSTEMID" NUMBER(4,0) NOT NULL ENABLE,
"PKCOMPANYCODE" VARCHAR2(8 CHAR) NOT NULL ENABLE,
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Explain Plan(With Insert Statement and Query):_
INSERT STATEMENT, GOAL = ALL_ROWS               Cost=9110025395866     Cardinality=78120     Bytes=11952360
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SORT GROUP BY               Cost=116615787     Cardinality=20168     Bytes=4073936
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VIEW     Object owner=ODS          Cost=4207     Cardinality=75507     Bytes=2340717
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PARTITION HASH ALL               Cost=3713     Cardinality=75936     Bytes=1594656
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Always raise a case with Oracle Support for such issues.
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Recently we started facing performance issues when we started working with Oracle Retail 13 worksheets from within the java GUI at clients desktops.
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ASH Report For ORCL/orcl
DB Name DB Id Instance Inst Num Release RAC Host
ORCL 1295420332 orcl 1 11.2.0.1.0 NO node6.node6-
CPUs SGA Size Buffer Cache Shared Pool ASH Buffer Size
2 1,561M (100%) 480M (30.7%) 432M (27.7%) 4.0M (0.3%)
Analysis Begin Time: 04-Oct-12 16:44:16
Analysis End Time: 04-Oct-12 16:59:33
Elapsed Time: 15.3 (mins)
Begin Data Source: V$ACTIVE_SESSION_HISTORY
End Data Source: V$ACTIVE_SESSION_HISTORY
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Average Active Sessions: 0.00
Avg. Active Session per CPU: 0.00
Report Target: None specified
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Avg Active
Event Event Class % Event Sessions
null event Other 33.33 0.00
Top Background Events DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
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Event Event Class % Activity Sessions
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os thread startup Concurrency 33.33 0.00
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No data exists for this section of the report.
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Avg Active
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No data exists for this section of the report.
Top SQL with Top Row Sources DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top SQL using literals DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Parsing Module/Action DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top PL/SQL Procedures DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Java Workload DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Call Types DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Sessions DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
-> '# Samples Active' shows the number of ASH samples in which the session
was found waiting for that particular event. The percentage shown
in this column is calculated with respect to wall clock time
and not total database activity.
-> 'XIDs' shows the number of distinct transaction IDs sampled in ASH
when the session was waiting for that particular event
-> For sessions running Parallel Queries, this section will NOT aggregate
the PQ slave activity into the session issuing the PQ. Refer to
the 'Top Sessions running PQs' section for such statistics.
Sid, Serial# % Activity Event % Event
User Program # Samples Active XIDs
10, 1 33.33 CPU + Wait for CPU 33.33
SYS [email protected] (ARC2) 1/917 [ 0%] 0
19, 148 33.33 null event 33.33
SYS [email protected] (J000) 1/917 [ 0%] 0
139, 3 33.33 os thread startup 33.33
SYS [email protected] (CJQ0) 1/917 [ 0%] 0
Top Blocking Sessions DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Sessions running PQs DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top DB Objects DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top DB Files DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Latches DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Activity Over Time DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
-> Analysis period is divided into smaller time slots
-> Top 3 events are reported in each of those slots
-> 'Slot Count' shows the number of ASH samples in that slot
-> 'Event Count' shows the number of ASH samples waiting for
that event in that slot
-> '% Event' is 'Event Count' over all ASH samples in the analysis period
Slot Event
Slot Time (Duration) Count Event Count % Event
16:48:00 (2.0 min) 1 CPU + Wait for CPU 1 33.33
16:50:00 (2.0 min) 2 null event 1 33.33
os thread startup 1 33.33
End of Report
Regards Benk

Non-Oracle connection through HS issue

Greetings!
I have created a HS to a MySQL server and from SQL> this works fine as a dblink
create database link "dvb_mysqllink"
connect to "sord_ro"
identified by "<pwd>"
using 'mysqlSORDdev_cmdb';
SQL> select 'foo' from dual@dvb_mysqllink;
'FOO'
foo
What do I do to use this HS from OWB?
1) In "Design Center" I select Databases->Non-Oracle->ODBC->"new" (via right click)
2) I name the Module "MYSQL_HS"
3) I edit (and rename) the resulting Location to MYSQL_HS_LOCATION and use:
4) Type: HOST:PORT:SERVICE
5) USER NAME: (username on Mysql same as dblink above)
6) Password: (password on Mysql same as dblink above)
7) Host (the database that holds the HS listener, same server the dblink is created in)
8) Port 1521
9) Service Name: "mysqlSORDdev_cmdb" (the same DNS/TNSLISTENER value used in the dblink)
when I hit test connection I get:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Generic Connectivity Using ODBC][MySQL][ODBC 3.51 Driver]Access denied for user 'SORD_RO'@'DSS0W023' (using password: YES) (SQL State: S1000; SQL Code: 1045)
ORA-02063: preceding 2 lines from OWB_961
I know the user/name password are correct as they're the same I use when creating the dblink via SQL....
Should I not use ODBC? Did I bump my head somewhere?
Any help here would be great.
Thanks in advance,
Dave-

You have to do the following steps:
1) In "Design Center", select Databases->Non-Oracle->ODBC->"new" (via right click)
2) Name the Module
3) Type Database Link
4) From Location: select the location of the database you have configured the databse link.
5) Database Link: if all is correct, you can select here the "dvb_mysqllink" databse link.
6) Test the connection.
I did those steps and it works, but i have a problem. When i want to import some tables, i can see the tables in the import wizard, but it don't import anything. The wizard is closed with no messages. Help, please!!

Oracle DB Restart Performance Issues

Hi ,
When we try to restart the database we are not able to restart So we changed the following values
db_cache_size
java_pool_size
large_pool_size
optimizer_mode From Choose to First_rows
pga_aggregate_target
sga_max_size
shared_pool_size.
Database Got restarted . But Now Database is up and running. Issue is that SQL Statements/Stored Procedures are running for Long time.
Do we need to fine tune these parameters again. Please advice
Database Version : Oracle 9i
Database Size 10GB
Transactions: 5,000/Day
Cheers

user627752 wrote:
When we try to restart the database we are not able to restart Before changing anything, the first question would be : why ? error message ? ...
...So we changed the following values
db_cache_size
java_pool_size
large_pool_size
optimizer_mode From Choose to First_rows
pga_aggregate_target
sga_max_size
shared_pool_size.Amazing. Why have you decided to change all those in one shot ? Base on what ?
>
... Issue is that SQL Statements/Stored Procedures are running for Long time.Right now, you are not able to figure out what change make your database slow, nothing surprising in fact.
Rollback all your changes and try again one by one, based on facts (statspack).
But first of all, reply to the first question above.
Nicolas.

Oracle Forms 6i performance issue

Hi All,
I have one query form.
Im using cursor in form and fetch the data directly and assign to the form block values.
There are two table involved here.
Table1 has 1 crore record.
Table2 has 4 crore record.
The query fetch the data 50-500 records.
In backend the select query is fast.
In front end ,it is taking time to load the data in grid.
How can i fetch the data quickly in front end.
Please help me out on this.
Regards,
Oracle1001

You can read documentation about this block property:
1.Query Array Size
2. Number of Records Buffered
3. Query All Records

AS + Oracle DB 10g performance issue

Hi,
My company is currently exploring Oracle Portal and Discoverer. I have a question and would really appreciate if anyone can help me.
I install the AS infrastructure and the database in the same machine. Currently when I log in to the portal for the first time of the day, it is always very slow. If I install the IAS and database in separate machines, will this give a significant improvement in the response time for my portal? What are the implications of installing this in 2 machines instead of 1?
Thanks :)

Two things -
With Portal and Discoverer, your AS setup probably includes both mid-tier and Infrastructure installations. (is this a BI & F type mid-tier?) The Infrastructure commonly installs its own database for Metadata repositories etc. So this machine has 2 x AS instances and 2 x Database server, correct? An awful lot for a single machine, I'd guess.
Do you restart the machine first thing each day? The first time a web app loads it has a startup latency. Monday morning, sort of. There is a lot of components involved and they all need to load up some stuff in memory to be able to do some work. This takes time (disk-> mem is very very slow, for one thing).
2 machines means more complex setup and hopefully a 'quicker' solution.
Depending on requirements, you may want one machine for customer/your own database, one machine for AS database and one for AS mid-tier.... What kind of platform are you planning on (hardware + os)?

As a number of Oracle Connections created - Performance Issue

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