Any solutions from oracle to improve Performance in Oracle Jdeveloper 10g
Hi ,
We are developing ADF Applications in Oracle Jdeveloper 10g , 4 developers are working . now every one M/c Ram upgraded to 4 GB
Still my developers are getting Performance issue , Like Java Heap memory Reached . when we saw in Task Manager Memeusage reached 450,000K
then Jdeveloper dies and hang there . we have to do this at least 4 to 5 times everyday . thats where it taking a lots of time to
modify a single small changes .
What our deveoper are doing they trying to commit frequently after making a important changes in application . but sometimes developer are also
forget in between . So wee need a solution for this if Oracle fixes this issue .
Thanks
KP
Hi,
We never had that issue with 10g (but happens in 11g), what is the project's size? I assume very big, else your environment must have something fishy, 10g is really fast and lightweight.
Regards,
~ Simon
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How to improve performance of Oracle Forms Server ?
Recently we converted our Application which was Developed in Forms 5.0 and Reports 3.0 into Forms6i to host that on to Web. We also loaded ORACLE 9iAS (on Windows NT 4 with service pack 3) from "Enterprise Edition" option by selecting Oracle Database Cache, Forms Server and Reports Server, HTTP Server(on port 80),Oracle Web Cache. Everything loaded succesfully including Caches.
Forms server is working perfectly and we were able to run our Application in Browser, but performance is the issue. We thought the caches will improve the performance, but it seems they are not at all working. When we run a report or form the Database cache is not giving any statistics whether a particular Query is a Hit or Miss though the cache is running. We got a doubt and searched in FAQ's and we found the following questions.
Oracle9iAS Web Cache Frequently Asked
Questions February 2001
Does Oracle9iAS Web Cache work with applications that use Oracle9iAS Forms?
Not in the 1.x release of Oracle9iAS. Integration between Oracle9iAS Web Cache and Oracle9iAS Forms will be addressed at a future date.
Oracle9iAS Database Cache
Does the Cache work with Oracle Forms and Portal in Oracle9i AS?
Since Oracle Forms and Portal utilize read/write PL/SQL stored procedures, these components cannot take advantage of the Cache. This support is being considered for a future version.
After coming to know that Caches doesnot boost the performance of Oracle Forms and reports. We have the following queries.
1) Clarify whether the above are True.
2) Apart from DB and Web Cache is there any other way where in we can improve the performance of Oracle Forms and Reports in Forms Server including the start up time.
3) What is the ideal configuration required for each tier (iAS Server,Database Server and Client) to host Forms on to Web considering our application as Medium scale.
(Presently our configuration are,
Application Server Configuration : Windows NT 4 with service pack 3,256 MB RAM,1 GB Virtual memory and 4GB free space and almost the same configuration is being used for
Database Configuration.
Client Configuration : Windows 98 with 64MB RAM).
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Gopi Kumar
nullA couple of questions for you:
1) What version of IAS are you using?
2) What's the version of Forms&Reports and
3) What version of patch are you using if any
for forms&Reports?
4) What applications are you running on the
machine where Forms&Reports is installed?
(I mean non-Oracle applications?)
The problem could be that, the base addresses
of the DLL's in Forms&Reports could be having base address conflicts with some other application's DLL's.
Forms and Reports needs to be fully rebased to achieve full performance on NT. Before release of Forms and Reports, Oracle rebases all DLLs. Rebasing assigns unique base addresses to all of the DLL's in use by an executable. A properly based DLL will load at its preferred base address, greatly improving the efficiency of memory utilization and the runtime performance of the executable.
Multiple utilities are available on NT to verify proper rebasing of DLLs. HandleEx v4.0 is one such freeware from Sysinternals and is available at www.sysinternals.com. Some others are "depends.exe" that's part of the MS Visual Studio or msinfo32.exe that comes with Office 2000 on NT.
If after running any of these utilities you discover that the DLL's ar not properly rebased, you need to contact Oracle worldwide support.
If you find that rebasing is not the problem, then please post your feedback again. Hope this helps. -
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Thank you for your information
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Thanks.4joey1 wrote:
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Need to improve performance of oracle query
Hi ,
Currently i have written query to get maximun salary from XYZ company like this
select salary from (
select salary from employee
where company='XYZ'
order by salary desc )
where rownum<2;
i thought of replacing the same with following query
select max(salary)
from employee
where company='XYZ';
Which one will be faster ? can you provide some statistical data.It will be good if you share some oracle documentation for this.
Thanks,
KannanMost likely the second one. And in any case: the second one is much more straightforward and readable (i.e. the syntax describes exactly what you want: get the max salary). In that way, your application is better maintainable (i.e. cheaper and better in the long run), and likely more easy to optimize for the database. And yes, in this case it's a simple query, but if you're thinking of writing even simple queries in the style of your first example, I'd hate to think of what more complex queries would get to look like...
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Hi,
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View Data -> Historical
Sessions
Runnable Process
Active Sessions
Instance Disk i/o
Instance throughput
Explain : What is (example :*what is session for?* ) , What is X and Y (example :*what is X = Y= Time and date*)
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If you have opted to show both the CPU cores and CPU threads,
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>
It basically tells you how much of a given resource was used at a point in time.
John -
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If you don't know what "closing properly" looks like, here's a decent link:
http://sdnshare.sun.com/view.jsp?id=538
This class does it right:
package jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
public class ConnectionTester
private static final String DEFAULT_DRIVER = "oracle.jdbc.OracleDriver";
private static final String DEFAULT_URL = "jdbc:oracle:thin:@host:1521:SID";
private static final String DEFAULT_USERNAME = "username";
private static final String DEFAULT_PASSWORD = "password";
public static void main(String[] args)
String sql = ((args.length > 0) ? args[0] : "");
String driver = ((args.length > 1) ? args[1] : DEFAULT_DRIVER);
String url = ((args.length > 2) ? args[2] : DEFAULT_URL);
String username = ((args.length > 3) ? args[3] : DEFAULT_USERNAME);
String password = ((args.length > 4) ? args[4] : DEFAULT_PASSWORD);
Connection connection = null;
try
connection = connect(driver, url, username, password);
if (!"".equals(sql.trim()))
List result = executeQuery(connection, sql);
for (int i = 0; i < result.size(); i++)
Object o = result.get(i);
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else
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catch (ClassNotFoundException e)
e.printStackTrace();
catch (SQLException e)
e.printStackTrace();
finally
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Class.forName(driver);
return DriverManager.getConnection(url, username, password);
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try
if (connection != null)
connection.close();
catch (SQLException e)
e.printStackTrace();
public static void close(Statement statement)
try
if (statement != null)
statement.close();
catch (SQLException e)
e.printStackTrace();
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try
if (resultSet != null)
resultSet.close();
catch (SQLException e)
e.printStackTrace();
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try
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connection.rollback();
catch (SQLException e)
e.printStackTrace();
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List result = new ArrayList();
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resultSet = statement.executeQuery(sql);
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Oracle text Improve perfomance
What is the best way to improve performance in Oracle text?
I retrieve some data in a csv file, i verify the data in a table (CUSTOMER) to
know if must make a INSERT or no.
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Give us the code what you are doing and we can help you further.
Herald ten Dam -
Where are the Oracle Data Binding Frameworks for Oracle Objects?
Oracle offers a few different options for data-binding frameworks to Oracle relational data. Amongst them they include TopLink and the Oracle Application Development Framework (ADF)in JDeveloper 10G. J2EE also offers the EJB standard framework. Both of the Oracle data-binding frameworks appear to work well with relational data but fail misserably when one tries to work with a fully fledged Oracle Object-Relational schema. I have spend much time with ADF but have not been able to create successful bindings to Objects with nested complex objects (such as a 2-level nested object) or objects containing nested tables. TopLink will not even touch Object tables.
Have other people being more successful with this? Do we have to implement our own data binding framework? Does Oracle plan on improving these frameworks to fully support Oracle Objects?TopLink Runtime supports both fully fledged OX mappings and nested complex objects. These mappings can be setup in the code.
TopLink ADF design time however currently does not have support for OX mappings.
Hope this helps, -
It is Any suggestions for improving Oracle Tools GUI performance?
Does anyone have any suggestions for improving the GUI performance of Oracles Java Tools? Response to events is very sloooow i.e. click on a menu in Oracle Directory Manager wait three seconds before the menu items appear.
System Environment:
Dell Inspiron 8100
Windows XP Pro
256MB Ram
1 GHz
Oracle:
Oracle91 Enterprise Edition 9.0.1.1.1
Other:
No non Oracle Java components installed (JDKs, JREs etc.)
ThanksIf the database and the tools are just on the one box more memory is probably required. I had an nt box with 500MHz 256MB and Oracle 9i and the java tools were unusable. I upgraded to 768MB of ram and the java tools were much quicker. I use the java tools on my laptop 256MB and 800MHz and they work fine for remote databases (ie. no rdbms on the laptop).
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How do I improve performance while doing pull, push and delete from Azure Storage Queue
Hi,
I am working on a distributed application with Azure Storage Queue for message queuing. queue will be used by multiple clients across the clock and thus it is expected that it would be heavily loaded most on the time in usage. business case is typical as in
it pulls message from queue, process the message then deletes the message from queue. this module also sends back a notification to user indicating process is complete. functions/modules work fine as in they meet the logical requirement. pretty typical queue
scenario.
Now, coming to the problem statement. since it is envisaged that the queue would be heavily loaded most of the time, I am pushing towards to speed up processing of the overall message lifetime. the faster I can clear messages, the better overall experience
it would be for everyone, system and users.
To improve on performance I did multiple cycles for performance profiling and then improving on the identified "HOT" path/function.
It all came down to a point where only the Azure Queue pull and delete are the only two most time consuming calls outside. I can further improve on pull, which i did by batch pulling 32 message at a time (which is the max message count i can pull from Azure
queue at once at the time of writing this question.), this returned me a favor as in by reducing processing time to a big margin. all good till this as well.
i am processing these messages in parallel so as to improve on overall performance.
pseudo code:
//AzureQueue Class is encapsulating calls to Azure Storage Queue.
//assume nothing fancy inside, vanila calls to queue for pull/push/delete
var batchMessages = AzureQueue.Pull(32); Parallel.ForEach(batchMessages, bMessage =>
//DoSomething does some background processing;
try{DoSomething(bMessage);}
catch()
//Log exception
AzureQueue.Delete(bMessage);
With this change now, profiling results show that up-to 90% of time is only taken by the Azure Message delete calls. As it is good to delete message as soon as processing is done, i remove it just after "DoSomething" is finished.
what i need now is suggestions on how to further improve performance of this function when 90% of the time is being eaten up by the Azure Queue Delete call itself? is there a better faster way to perform delete/bulk delete etc?
with the implementation mentioned here, i get speed of close to 25 messages/sec. Right now Azure queue delete calls are choking application performance. so is there any hope to push it further.
Does it also makes difference in performance which queue delete call am making? as of now queue has overloaded method for deleting message, one which except message object and another which accepts message identifier and pop receipt. i am using the later
one here with message identifier nad pop receipt to delete message from queue.
Let me know if you need any additional information or any clarification in question.
Inputs/suggestions are welcome.
Many thanks.The first thing that came to mind was to use a parallel delete at the same time you run the work in DoSomething. If DoSomething fails, add the message back into the queue. This won't work for every application, and work that was in the queue
near the head could be pushed back to the tail, so you'd have to think about how that may effect your workload.
Or, make a threadpool queued delete after the work was successful. Fire and forget. However, if you're loading the processing at 25/sec, and 90% of time sits on the delete, you'd quickly accumulate delete calls for the threadpool until you'd
never catch up. At 70-80% duty cycle this may work, but the closer you get to always being busy could make this dangerous.
I wonder if calling the delete REST API yourself may offer any improvements. If you find the delete sets up a TCP connection each time, this may be all you need. Try to keep the connection open, or see if the REST API can delete more at a time
than the SDK API can.
Or, if you have the funds, just have more VM instances doing the work in parallel, so the first machine handles 25/sec, the second at 25/sec also - and you just live with the slow delete. If that's still not good enough, add more instances.
Darin R. -
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1. Tap the "waiting" icon and see if you can pause it. If it does pause, then tap it again and see if it will resume. If that works, repeat the same steps for each "waiting" icon.
2. Reboot the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.
3. Make sure that you do not have a stalled download in iTunes - if you have a download in there that did not finish, complete that one first. If you see a downloads tab in the lower right corner, then there is a download in iTunes.
4. If that doesn't work - sign out of your account, restart the iPad and then sign in again.
Settings>iTunes & App Store>Apple ID. Tap your ID and sign out. Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
Go back to Settings>iTunes & App Store>Sign in and then try to update again. Tap one waiting icon only if necessary to start the download stream.
5. You can also try deleting the waiting icons - tap and hold down on an icon until it wiggles - the tap the X on the icon to delete it. Then try to download again. Apps may also be able to be deleted in Settings>General>Usage>Storage if you cannot get the X to pop up on the icon.
6. You can try resetting all settings. Settings>General>Reset>Reset All Settings. You will have to enter all of your device settings again.... All of the settings in the settings app will have to be re-entered.
7. Reset your router. Unplug it from power for about 30 seconds and then plug it back in again.
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