Maximum Conncetions Oracle can provide

I have this query, how many maximum connections does oracle provide to any applications server.
I am aware that the number of connections are configurable. But i wanted to know the maximum number of connections after which there is a possibilty of oracle to crash, or after these particular number connectins oracle wont support any more connections.
Please help me with this, as im in desperate need of a solution.

There is no functional limit to the number of connections Oracle can support. There may be some internal limit (i.e. session ID may be an integer, which would limit you to 4 billion connections on a 32-bit system) but I've never heard of anyone actually hitting such a limit. In reality, you will be constrained by your hardware long before you are constrained by Oracle.
Unfortunately, estimating how many connections your particular hardware can support is not trivial. It depends, obviously, on your hardware, but it also depends on your application and on how your database is configured-- shared server vs. dedicated server would be the largest factor here.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Similar Messages

Maximum Connections Oracle can provide

I have this query, how many maximum connections does oracle provide to any applications server.
I am aware that the number of connections are configurable. But i wanted to know the maximum number of connections after which there is a possibilty of oracle to crash, or after these particular number connectins oracle wont support any more connections.
Please help me with this, as im in desperate need of a solution.
Thanx for your time.
Nikhil

There is no functional limit to the number of connections Oracle can support. There may be some internal limit (i.e. session ID may be an integer, which would limit you to 4 billion connections on a 32-bit system) but I've never heard of anyone actually hitting such a limit. In reality, you will be constrained by your hardware long before you are constrained by Oracle.
Unfortunately, estimating how many connections your particular hardware can support is not trivial. It depends, obviously, on your hardware, but it also depends on your application and on how your database is configured-- shared server vs. dedicated server would be the largest factor here.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Oracle Data Provider (ODP) Passing Arrays to PL/SQL

Does anyone know how to pass an array or collection of data (from VB.net) to PL/SQL using the new Oracle Data Provider?
My PL/SQL procedure is accepting type Table (Table array).
This was easily done with Oracle Objects (in VB6) but I've found no way to do this with the new provider with .Net.
It seems like a serious limitation if it can't be done.
Anyones help would be appreciated.

Just out of interest, what are the performance implications of using REF CURSORS for retrieving resultsets from Oracle stored procedures via ODP.NET?
When coding the PL/SQL for these, the REF CURSOR is left OPEN and not explicitly CLOSED. When does the cursor actualy get closed? Is there a risk of reaching "maximum open cursors" or some other limit more quickly if REF CURSORS are used in this manner?
I haven't found any documentation of this issue as yet.

Oracle Data Provider

When I use the new Oracle Data Provider for .Net ver 9.2.0.4 I get the following web error:
"The located assembly's manifest definition with name 'Oracle.DataAccess' does not match the assembly reference."
The Oracle.DataAccess reference is displayed in the solution explorer of .Net and the path property is correct.
I am running a web base application. The old Oracle Data Provider which I was using ver 9.2.0.1.1 works fine. Any ideas?

Scott,
To solve this, you need to recompile your web application with the new ODP.NET driver. This is one of the tenets of .NET. Thou shall avoid DLL hell by binding to a specific DLL version for your application...or something like that. You can't just plug in a new DLL anymore in an application without recompiling

Oracle OLEDB PRovider with ASP

hi,
Can anyone provide me a piece of code which demonstrates how to call an Oracle sp from asp using the Oracle OLEDB provider.
I would also appreciate if the Oracle package code could be provided too, since with the Provider we have to have a different code for the stored procedure (Ref cursor..??)
I have been successfully connecting using the Microsoft ODBC Driver, but looks like it has some big time bugs in it which causes our server to hang and a dllhost.exe to consume large amounts of database memory.
Anybody can help me with that?
Many Thanks,
Harshad.

Harshad,
Oracle OLEDB samples are available at
http://otn.oracle.com/sample_code/tech/windows/ole_db/content.html
URL.
"Returning multiple recordsets from a stored procedure" sample demonstrates
how REF cursors are returned from a Stored Procedure (contained in a DB package).
This sample is a stand alone application and not an ASP program, but the same code
can be helpful for ASP too.
Regards
Jagriti

Oracle connect failed on x64 and IA64 platform via Oracle OLEDB provider

Hi everyone,
I installed SQL Sever on x64 and IA64 machine, and Create a database via Oracle datasource. I can connect the datasource via OLEDB and .Net provider successfully on x86 machine. But failed to connect the Oracle datasource on x64 and IA64.
Following is the error messgae:
1) Install 64 bit build on x64 machine:
Error message: Test connection failed because of an error in initializing provider. ORA-06413: Connection not open.
2) Install 32 bit build on x64 machine:
Error message: Test connection failed because of an error in initializing provider. Oracle client and networking components were not found. These components are supplied by Oracle Corporation and are part of the Oracle Version 7.3.3 or later client software installation.
I know there is a know bug on c:\Program Files (x86)\... with Oracle provider. And some one has given a workarround method that I should move my my application out of the the folder path which includes parentheses. But it really is mess method for SQL Server (That is my application)......
Is there any other workarround method? Or when will Oracle fix this bug?
Thanks^_^
Lindsay

Is 10204 available for x64 and IA64. It is said that there is only 10204 for x86 machine, right?
I downloaded 10203 for IA64 machine and tested connection on SQL Server with Oracle datasource via Oracle OLEDB provider, and got the following error (The data source is Oracle92 installed on another machine):
Test connection failed because of an error in initializing provider. Oracle client and networking components were not found. These components are supplied by Oracle Corporation and are part of the Oracle Version 7.3.3 or later client software installation.
Could you please tell me what's wrong with it?
Thanks
Lindsay
Message was edited by:
lindsaywang

Oracle.portal.provider.v1 and oracle.portal.provider.v1 confusion

Hi, i've got a very simple question, i'm very confused with the recent download of the PDK. The problem is that a lot of articles use in their examples the Java API oracle.portal.provider.v1, but the current version of the portal is v2 and in the jar files pdkjava.jar and ptlshare.jar exists an oracle.portal.provider.v2 package and the oracle.portal.provider.v1 package is almost empty and the v2 package is different from the ancient v1, what i really need to know is:
Its possible to use the v1 package in the new portal release without any addicional work?
Has the v2 package fully replaced the v1 packaged, and if so why the documentation is not updated?
Thanks,
Antonio Cruz

PDK contains both v1 & v2 and the developer is free to choose
whichever version he is comfortable with.
v1 related jpdk information can be found under
{PDK-EXTRACTED-DIR}/pdk/jpdk
v1 related urlservices information can be found under
{PDK-EXTRACTED-DIR}/pdk/urlservices
v2 related information can be found under
{PDK-EXTRACTED-DIR}/pdk/jpdk/v2. It contains both JPDK and URLServices
in it.
To answer you questions -
You can use v1 package without any additional code.
The sample are available in both v1 and v2. So, naturally there is
no need to change the articles.
-AMJAD.

Oracle.portal.provider.v1

Which library contains oracle.portal.provider.v1.* package ? I am trying to render a portlet in JDev and I get a class not found error for this.

Hello,
You can download the JPDK version 1 from this PortalCenter. (select pdkv1.zip JPDK and URL-based libraries)
This contains all the necessary classes to compile V1 Java portlet.
But I am not sure that you will be able to run the portlet from JDeveloper since the APIs in V1 are targetting Apache JServ as servlet container. When JDeveloper use a pure J2EE Container. (OC4J)
Regards
Tugdual Grall

Maximum setting that can be done for pivot view in instanceconfig.xml.

Hi All,
Can anyone let me know if there is any maximum setting that can be done for pivot view in instanceconfig.xml.
Regards,
Apoorv

Hi,
Our instanceconfig has the following settings..
<PivotView>
<MaxCells> 4000000 </MaxCells>
<MaxVisibleColumns> 5000 </MaxVisibleColumns>
<MaxVisiblePages> 2500 </MaxVisiblePages>
<MaxVisibleRows> 75000 </MaxVisibleRows>
<MaxVisibleSections> 3000 </MaxVisibleSections>
<ResultRowLimit>20000</ResultRowLimit>
</PivotView>
<CubeMaxRecords> 1000000 </CubeMaxRecords>
<CubeMaxPopulatedCells> 1000000 </CubeMaxPopulatedCells>
But is there somekind of documentation or Oracle recommendation on maximum setting for pivot view....
Need it, as it seems even the existing settings are not quite fruitful in fulfilling user requirements.

Oracle Sitemap Provider with 10g R1

please help,
I know implementation of oracle sitemap provider needs change notiffcation feature in database, which is why it doesnt work in 10G R1. I have successfully use the oracle sitemap provider, but when i try to add the site map node or giving roles to some node, the sitemap doesnt refresh that instantly.
Is there any work around for this problem.
Any help will be verymuch appreciated
Message was edited by:
user633898

I am having this issue with a 10.2 database. Change Notification has been granted to the connecting user. When I add a node in ora_aspnet_sitemap it does not show up in my databound asp:menu control. Previously added nodes show up just fine. I know the nodes are there and accessible (I can query them with Oracle.DataAccess objects that use the same connection string as the sitemapprovider). Furthermore, I notice that the very first time I open Visual Studios 2008 and run my site locally, I get the following error message:
"Multiple nodes with the same URL '/~temp emp.aspx' were found. XmlSiteMapProvider requires that sitemap nodes have unique URLs."
Stack Trace:
[InvalidOperationException: Multiple nodes with the same URL '/~temp emp.aspx' were found. XmlSiteMapProvider requires that sitemap nodes have unique URLs.]
System.Web.StaticSiteMapProvider.AddNode(SiteMapNode node, SiteMapNode parentNode) +717
Oracle.Web.SiteMap.OracleSiteMapProvider.BuildSiteMap() +3454
System.Web.StaticSiteMapProvider.FindSiteMapNode(String rawUrl) +133
System.Web.UI.WebControls.SiteMapDataSource.GetNodes() +193
After I get this error, if I run the site again, it loads fine (albiet missing the newly added nodes). What I find interesting about the error message is that I do not have a "/~temp emp.aspx" node in my ora_aspnet_sitemap table, nor is there a page in my site with this name.
Any ideas, solutions?

Multiple Recordsets and the Oracle OleDB Provider

We are trying to return multiple recordsets from an Oracle SP through the Oracle oledb provider using VB. First of all, is this possible and is there any example code out there. Having trouble finding some info on this.
Thanks

After reading install guide I figured out waht might be the problem.
I put OLEDB install into the same home (ora81).
It was suppose to go into different home directory (ora92).
Also, OLEDB is one of few components which can't exist in more then one
home dir on single machine. Installer knows that, and skips install of
OLEDB provider itself. So in my case I had to first uninstall OLEDB provider 8.1.7
and then install OLEDB provider 9.2
Thanks,
...dejan

[Servlet Error]-[SOAPServlet]: oracle.webdb.provider.v2.utils.so

Hi I am getting the following error when I try to access my providers on a websphere application server... they worked fine before but I reintalled the ear file on websphere and I get the following error now...
WebApp E SRVE0026E: [Servlet Error]-[SOAPServlet]: oracle.webdb.provider.v2.utils.soap.SOAPException: Can't read deployment properties for service: _default
     at oracle.webdb.provider.v2.adapter.SOAPServlet.locateService(Unknown Source)
     at oracle.webdb.provider.v2.adapter.SOAPServlet.doHTTPCall(Unknown Source)
     at oracle.webdb.provider.v2.adapter.SOAPServlet.service(Unknown Source)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
     at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1282)
     at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:673)
     at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:2916)
     at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:220)
     at com.ibm.ws.webcontainer.VirtualHost.handleRequest(VirtualHost.java:204)
     at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1831)
     at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:84)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:469)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:408)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:286)
     at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminaters(NewConnectionInitialReadCallback.java:201)
     at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:103)
     at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:566)
     at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:619)
     at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:952)
     at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1039)
     at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1455)

Hi
If i remember correctly I also had this error, it was because I didnt have a specific jar file in my ear file.
For your application server did you put the ptlshare.jar and pdkjava.jar files in the classpath of your oc4j instance? To quickly test this, you can also add these files to your ear file, but sharing them amongst other ear files is better ofcourse.
hope this'll help

Append hint + ADO + Oracle OleDB Provider

Hi everybody!
This is my first post here in this great forum! ;-)
I have a problem using Append hint with Oracle OleDB Provider and I've been searching internet for an answer without any luck.
I'm trying to use Append hint with ADO + Oracle OleDB Provider (OraOLEDB.Oracle.1), like in the SQL below:
INSERT /*+APPEND*/
INTO my_table(field1, field2, field3)
SELECT 0 field1, v.field2, v.field3)
FROM my_second_table v
The problem: Oracle is still creting log for this INSERT (It is working like there was no Append hint).
If I use the same SQL statement with Microsoft Ole DB Provider for Oracle, the Append hint works as expected (log is not created), but doesn't work at all with Oracle DB Provider.
Trace shows me that the SQL sentence is ok (the append hint is there!).
I've tried Oracle servers 9.2 and/or 10g, and the problem is the same.
Question: Does Append hint work with Oracle OleDB Provider? If yes, why it is not working? Something related with connection properties?
Any help will be much appreciated!
Thanks in advance.
Alexandre Machado

user8010279 wrote:
Hi Solomon, thanks for you answer.
Is the same SQL against the same database, with the same program, using ADO + OleDB Provider.
The table is in NOLOGGING mode.
When I use Microsoft OleDB Provider for Oracle there is no log creation. Then I disconnect and reconnect to the same server/database, using Oracle OleDB Provider. Then I execute the same SQL and.... there IS log creation, meaning that in that scenario, append hint is being ignored. I can't figure out WHY!!! :-(
Alexandre,
I'm not sure what you mean by "there is log creation". In general you need to distinguish between UNDO and REDO generation. A direct-path insert (APPEND hint) doesn't generate undo but still can generate redo, depending on the ARCHIVELOG / FORCE LOGGING mode of the tablespace resp. database and the LOGGING/NOLOGGING attribute of the table.
Note that in case indexes exist on the table there will always be undo and therefore redo generation for the index maintenance as part of the direct-path insert.
You should check V$SESSION (SQL_ID in 10g, SQL_ADDRESS + SQL_HASH_VALUE in pre-10g) and V$SQL in the database to double check if the SQL passed by the Oracle OLEDB Provider actually contains the APPEND hint in case the INSERT actually generates UNDO (which is the indicator that shows you if the direct-path insert is used or not). Whether it generates REDO is - as already mentioned - depending on other factors.
So the question is how have you determined if the direct-path insert mode has been used or not?
The simplest approach to test if direct-path insert mode is used or not is to issue a query on the object inserted into after the insert before committing the transaction. If it fails with "ORA-12838: cannot read/modify an object after modifying it in parallel" then you successfully inserted using direct-path insert.
Note that there a number of restrictions that prevent the direct-path insert from happening, in those cases the APPEND hint will be silently ignored, e.g. enabled triggers, foreign keys on the table. A quite comprehensive list of restrictions is listed in the manuals here:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28313/usingpe.htm#CACEJACE
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/

Oracle data provider not appearing in MS Business Intelligence reporting

Oracle Data provider does appear is VS 2005 server explorer but NOT as a data source in the reporting project type.
This is in oracle ODAC beta 11
Is this supported?

I believe your developer encounters a hang when using the Microsoft reports wizard with MS OracleClient. I don't know why this is happening, but this issue would need to be resolved by Microsoft. They build both the reports wizard and MS OracleClient. They would need to identify what in their code is causing the problem. If they find out the underlying cause is a call they are making into Oracle, then Oracle will fix it.
Oracle builds ODP.NET, which I haven't seen work with the reports wizard query builder. But I haven't fully investigated why. There may be additional configuration needed to wire these together.
If you would like to discuss this in detail, you can email me at alex.keh [at] oracle.com

Problems about SQL (conversion to a form that Oracle can understand)

how can I convert this SQL into a form that Oracle can understand??
Select Temp.Country_name, number1
from (Select L.CID, C.country_name, count(*) as number from Leagues L, Countries C
where L.cid = C.cid and L.season = 'Autumn'
Group By L.CID, C.country_name) AS Temp
where number1 = (Select MAX(Temp. number1) from Temp)
ORDER BY Temp.Country ASC;
this query is to find the country that held the maximum number of leagues in "Autumn". Display the country_name and number. Sort the result according to country_name in alphabetical order and it should be allowed in SQL/92.
relational schema of Leagues ( LID(PRIMARY KEY), LEAGUE NAME, CHAMPION_TID, YEAR, SEASON, CID)
COUNTRIES (CID, COUNTRY_NAME, FOOTBALL_RANKING)
Thank You.

Hi,
Welcome to the forum!
Sorry, I don't know what's allowed in SQL/92.
This works in Oracle 9 (and up) and doesn't rely on anything that I know is an Oracle-specific feature:
WITH       country_summary     AS
     SELECT       c.country_name
     ,       COUNT (*)          AS country_total
     FROM       leagues     l
     JOIN       countries     c     ON     c.cid     = l.cid
     WHERE       l.season     = 'Autumn'
     GROUP BY c.country_name
--     ,            c.cid          -- needed only if country_name is not unique
SELECT     *
FROM     country_summary
WHERE     cnt     = (
                SELECT MAX (cnt)
                FROM    country_summary
;Here's another way, which works in Oracle 8.1 (and up):
SELECT *
FROM     (
          SELECT       c.country_name
          ,       COUNT (*)                         AS country_total
          ,       RANK () OVER (ORDER BY COUNT (*) DESC)     AS rnk
          FROM       leagues     l
          ,       countries     c
          WHERE       c.cid          = l.cid
          AND       l.season     = 'Autumn'
          GROUP BY c.country_name
     --     ,            c.cid          -- needed only if country_name is not unique
WHERE     rnk     = 1
;By the way, do you find it easier to read and understand code when it's formatted like the examples above, or as you posted it?
Help the people who want to help you. Always format your code. When posting any formatted text on this site, type these 6 characters:
\(small letters only, inside curly brackets) before and after each section of formatted text, to preserve spacing.
Edited by: Frank Kulash on Nov 4, 2010 10:35 AM
Revised 2nd option, because Oracle 8.1 can't use ANSI join syntax.

Maximum Conncetions Oracle can provide

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