Keep A Few Connections Open All The Time Or Open/close Connections On The Fly?
Jul 20, 2005
Just a quick question about connection management. My application will
never need more than 1 or 2 connections about at any given time. Also, I do
not expect many users to be connected at any given time. For efficiency, I
would like to keep connections alive throughout the lifetime of the objects
requiring them, rather than opening a new connection, executing code and
then closing it again. What is the most efficient way of doing this?
Should I perform the open/close or just one open when I create the object
and a close when I dispose of it?
I got an approach like that: 1) Read something from DB - check the value, if true stop if false go on2) Read the second Value (another SQL Statement) - check the value etc. Now I could open the connection at 1) and if I have to go to 2) I leave the connection open and use the same connection at 2). Is it ok to do that? The other scenario would be opening a connection at 1), immediately close it after I read the value and open a new connection at 2). Thanks for the input!
I want to open and close sql connection only once and want to use in every function without open or close this connection in class file in asp.net 2003 . how can it possible .
How can I know how many connections are open at a given point of time while I am testing an ASP.Net application? The application uses SQL Server 2000 as its database.
Would be very pleased if anyone knows a solution to my prob.
I connect via ODBC (ADO) within Active Server Pages with an SQL Server 6.5 database. The connection is opened at the top of the pages that need the database, and closed at the end of each individual page. Thing is, the connections for one single user are max. around 3 connections (checked that in Performance Monitor), no matter how many times the user opens his browser with the application. However, when say 20 users log on, the max. number of user connections as configured is reached within no time! The connections are not being closed (even with connection pooling on, they increase like hell!). The only way to close them seems to be stopping the MSSQLServer service, but that's something ya don't want, of course.
It's jut plain crazy to increase the number of user connections to around 250 for about max. 80 user connections at one time...
Hi I'm trying to have 2 datareaders open at the same time with MultipleActiveResultSets=True but still getting an error saying There is already an open DataReader associated with this Command which must be closed first. Do you see what I might be doing wrong? Thanks. <configuration> <connectionStrings> <add connectionString="user id=username;data source=servername;persist security info=True;initial catalog=corporate_mel;password=password;MultipleActiveResultSets=True;" name="corporate_mel" providerName="System.Data.SqlClient" /> Dim strConnection As String Dim sqlConn As SqlConnection strConnection = System.Configuration.ConfigurationManager.ConnectionStrings("corporate_mel").ConnectionString sqlConn = New SqlConnection(strConnection) sqlConn.Open()
This is the actual code where I'm trying to use 2 datareaders: ' Retrieve Data from database based on selections chosen in ListBox Dim cmdCommittee As New SqlCommand("Select * from committees_tbl where committee_id in" & _ "(" & strCommitteesRemoveLast & ") order by committee_name", sqlConn)
' setup a datareader Dim drCommittee As SqlDataReader = cmdCommittee.ExecuteReader()
' Loop through datareader and insert rows ' into the xref_person_committees_tbl While drCommittee.Read() Dim strCommitteeName As String = drCommittee("committee_name") 'retrieve committee_name from datareader
' Create a sql string Dim strAddCommittee As String = String.Empty strAddCommittee = "Insert into xref_person_committees_tbl (committee_name) values ('" & strCommitteeName & "')" 'Response.Write(strAddCommittee & "<br>")
' Create a sql command to process the insert Dim sqlAddCommittee As New SqlCommand(strAddCommittee, sqlConn) Dim drNewCommittee As SqlDataReader = sqlAddCommittee.ExecuteReader()
I'm trying to run a data driven subscription on a report in the rs2005,
and using a data source to oracle,
I found out that when the subscription runs it opens a connection to oracle for each report and it means that i have more than fifteen open connections every time which causes a performance problems
Hi Guys, how many connections does sql 2005 express allow to .mdf file. I stumpled on info on a microsoft site (actually a forum post on msdn) that sql server express allows only a single connection to an .mdf file. Iam intrested in this because i developed reporting services reports in BIS and iam having problems. If i run a report from report manager, i have to wait for close to 20 minutes before i can be able to run my asp.net application agian. Else if i insert data or retrieve data from my asp.net application, then i have to wait again for 20 minutes or more before i can be able to run my reports else i will get an error that a connection can not be made to the database or that the database is being used by another process. So in all cases, i have to wait for 20--30 minutes before a connection can be made to the .mdf file. i.e after running a report or after inserting or retrieving data from the database through my asp.net application. Iam using sql sever 2005 express with advanced services and visual web developer on windows server 2003. Any ideas or help.
I am working on a stock price analysis project. Stock prices are stored in SQL Server as tick by tick data (that means in a high frequency) and need to be grouped by minutes in order to display them as as high, low, open and close prices in a candlestick or similar chart.
The fields in the table are:
Time (for every stock price tick) Price (stock price) Symbol (of the stock)
Hi everybody,How is it possible to close any open connections from the connection pool explicitly like on the log off page? So when the users log off from the application I want to close all connections that were opened during the use of application.asp.net forums is the best....thanks,Murthy here
Problem: Connections to SOAP endpoints never close even if app initiating call was shutdown several days earlier. Create Endpoint statement included at bottom
Questions: 1 Why? 2. Is there a configuration option I need to set?
[1] Client side: Multiple clients from XMLSpy running on XP Pro to WebSphere Process Server running on AIX
[2] Server side:
What is the MS SQL version? SQL Server 2005 SP2
What is the SKU of MS SQL? Enterprise
What is the SQL Server Protocol enabled? Shared Memory | and TCPIP
Does the server start successfully? YES If SQL Server is a named instance, is the SQL browser enabled? YES
What is the account that the SQL Server is running under? Domain Account Do you make firewall exception for your SQL server TCP port if you want connect remotely through TCP provider? NO
Do you make firewall exception for SQL Browser UDP port 1434? In SQL2000, you still need to make firewall exception for UDP port 1434 in order to support named instance. NO [2a] Tool Used to Connect: Multiple clients from XMLSpy running on XP Pro to WebSphere Process Server running on AIX
[3] Platform:
What is the OS version?Windows 2003 SP2 Do you have third party antivirus, anti-spareware software installed? McAfee. Exceptions have been set in accordance with MS SQL Server documentation
ENDPOINT:
CREATE ENDPOINT [TestEndpoint]
AUTHORIZATION [AuthID]
STATE=STARTED
AS HTTP (PATH=N'/SqlSSL/testEndpoint', PORTS = (SSL), AUTHENTICATION = (BASIC),
should u always close everys sqldatasource connection string and the dataset associated with it, if so how do u do that (ie the proper way) and is it possible to to do it in the session area of global.aspx, NEt 2.0 or should it be done when exiting the page containing the data stuff, also same question for NET 1.0 datasets and adapters and strings,
I created this trigger on a table that i think failed while execution. I tried to modify it and run it again but it seems that i cant do that. If i try and delete the database i also cant - saying that it is still in use. But i am not using it and ther are no other users connected to it. I think the trigger has probably hit a loop and that is holding the link.
To close that i know that a solution would be to restart the SQL server instance but that would be a bit hard since the SQL server where my test database resides is a production server and has few other databases that are important and few users use them.
Is there any way through a SQL statement that there can be forced a delete? Or force close all the connections? Or force close all the processes without actually restarting the SQL server instance.
I have tried all options that were offered on some other forums like forcing it to a single user but even that operation can not be performed saying that the database is still in use.
In SQL Server Management Studio, it is possible to do the following:
a) In Object Explorer, connect to a particular SQL Server Database Engine, let's call it X. b) Use that connection to generate many SQL queries, connected to X, in the right-hand pane. c) In Object Explorer, connect to a particular SQL Server Database Engine, let's call it Y. d) Use that connection to generate many SQL queries, connected to Y, in the right-hand pane. e) Close the connection to X, which was created in step (a), from within Object Explorer.
In the right-hand pane, I am now left with a bunch of queries connected to X, and a similar bunch of queries connected to Y. Any quick way to shut all the queries connected to X, but none of the queries connected to Y?
This question can assume real practical importance if server X is a Live Production Server, and server Y is a Test Server, and my next job of the day is to run a change script against server Y....
I have looked for an option in Management Studio to "Close all queries connected to Server X", but haven't found one.
Hi I always get good reply from u all, thank you, I have copied my asp.net website from one server to another. they administrator made necessary modification on IIS manager . and able to see the website on browser. but now i can't loging to system using old password. I tryed to create new password then also it gives error System.Data.SqlClient.SqlException: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) Here I have used asp.net login control and membership class. Do I need to make nay changes in code. I have already modified server name in connection string in web config file. any one can say what is the problem and how to solve this. thanks Pat
Hi , I am struck with one issue.Plz help me out if you have any solution for this one. Details Front End - Visual Studio 2005 Back End -SQL Server 2000 (Remote database) Error i am getting is {System.Data.SqlClient.SqlException: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Connect(Boolean& useFailoverPartner, Boolean& failoverDemandDone, String host, String failoverPartner, String protocol, SqlInternalConnectionTds connHandler, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject, Boolean aliasLookup) at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.SqlClient.SqlConnection.Open() at dbcAccess.clsSQL.GetConnect() in C:Documents and SettingskerlsgMy DocumentsVisual Studio 2005ProjectsdbcAccessdbcAccessclsSQL.cs:line 296}
{System.Data.SqlClient.SqlException: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Hi All, I have a table call case and case_status have two fields, date and status as below: date status 04/01/2006 open 04/05/2006 closed 04/10/2006 open 04/15/2006 closed Whenever i open and closed the case, one record is insert into the case_status table. Now I would need to calculate the total days of the case in storeprocedure. Anyone can help me please. Aung
Just to verify that this was an issue, I downloaded web developer 2008 and I do not experience this same problem.
BUT when I go to add a dataset in vs2005 for an asp website - all my db files come up in the dialogue box but everyone that click (every db file) I get "This file is in use. Please enter a new name or close the file that's open in another program."
But, like I said, I downloaded 2008 and it does not occur. Plus I KNOW that the db's are not being used. Can someone give me a remedy to this?
we have roughly 22 people connected to one database. But after a while, their applications begin to drag due to in and out communication with the server. When i check the active connections on the sql server, some times i see 157 active connections, please how to i set a timeout or connection interval close, so as reduce the heavy load being put on the server. Or how can i automatically close connections when they get higher than 50 connections.
Hi,I have SQL Server Express Edition. I tried working out some ASP.NET Labs in my local system. Here is the link of the Virtual Lab which I tried. http://msevents.microsoft.com/CUI/WebCastEventDetails.aspx?EventID=1032286906&EventCategory=3&culture=en-US&CountryCode=USI recieve this error in my local system. An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)I tried working out solutions from various websites. But the no solution is effective. Could anyone help me in solving this issue.
I would like to restore database using RESTORE DATABASE ... REPLACE command. If database exists already and has any open connections this command will fail. I would like to close all existing connections to specific database before running RESTORE DATABASE ... REPLACE command. I can do closing from Management Studio using checkbox "Close Existing Connection" when deleting database. Actually I need to do the same but from script.
I get the below error only when my IDE open. It connects well when it is found closed. [SqlException (0x80131904): Cannot open user default database. Login failed.Login failed for user 'JPASPNET'.] I could solve this by giving the logged in windows user to impersonate under IIS window > WEBSITE > ASP.NET tab > EDIT CONFIG > APPLICATION tab But I wish someone could give me the proper solution. I almost tried all from giving ASPNET user as a administrator to configuring the same in Express management tool. Environment: XP pro, VWD and SQL Express
Hi,We have a C# web application that has been running for a few years now with little maintenance. Over the past few months, we have had some increasing problems.1. Loses session frequently ~ every 2-3 minutes.2. Occasionally (every 2 months) get out of memory exceptions.3. Connections to the DB and therefore the whole site run fast after restart. Gets continuously slower and slower over time until it starts throwing timeouts: System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. The timeouts usually come every 3 weeks or so. Number 3 is the biggest problem for us, but I thought maybe 1 or 2 give some indication to why 3 is happening?I don't have much time to look into this now as I'm working on another project, but I was hoping that maybe someone would have ideas just looking at our symptoms.Thank you so much,Christie
Post installation of SQL Server 2014 Express edition, I am able to connect to the Database Instance.
But while opening a new query window in SSMS or opening a table getting the error:
Package 'RadLangSvc.Package, RadLangSvc, Version 12.0.0.0, Culture=Neutral, Public Token=89845dcd8080cc91' failed to load
Object reference not set to an instance of an object. (mscorlib)..Have already tried installing the componentsDACProjectSystemSetup_enu.msi, TSql LanguageService_enu.msi, DACFramework_enu.msi from path VS 2010 WCU DAC.
Hi there, Here we have got a asp.net application that was developed when database was sitting on SQL server 6.5. Now client has moved all of their databases to SQL server 2000. When the database was on 6.5 the previous development team has used oledb connections all over. As the databases have been moved to SQL server 2000 now i am in process of changing the database connection part. As part of the process i have a login authorization code. Private Function Authenticate(ByVal username As String, ByVal password As String, ByRef results As NorisSetupLib.AuthorizationResult) As Boolean Dim conn As IDbConnection = GetConnection() Try Dim cmd As IDbCommand = conn.CreateCommand() Dim sql As String = "EDSConfirmUpdate" '"EDSConfirmUpdate""PswdConfirmation" 'Dim cmd As SqlCommand = New SqlCommand("sql", conn)
cmd.CommandText = sql cmd.CommandType = CommandType.StoredProcedure NorisHelpers.DBHelpers.AddParam(cmd, "@logon", username) NorisHelpers.DBHelpers.AddParam(cmd, "@password", password) conn.Open() 'Get string for return values Dim ReturnValue As String = cmd.ExecuteScalar.ToString 'Split string into array Dim Values() As String = ReturnValue.Split(";~".ToCharArray) 'If the return code is CONTINUE, all is well. Otherwise, collect the 'reason why the result failed and let the user know If Values(0) = "CONTINUE" Then Return True Else results.Result = Values(0) 'Make sure there is a message being returned If Values.Length > 1 Then results.Message = Values(2) End If Return False End If Catch ex As Exception Throw ex Finally If (Not conn Is Nothing AndAlso conn.State = ConnectionState.Open) Then conn.Close() End If End Try End Function ''' ----------------------------------------------------------------------------- ''' <summary> ''' Getting the Connection from the config file ''' </summary> ''' <returns>A connection object</returns> ''' <remarks> ''' This is the same for all of the data classes. ''' Reads a specific connection string from the web.config file for the service, creates a connection object and returns it as an IDbConnection. ''' </remarks> ''' ----------------------------------------------------------------------------- Private Function GetConnection() As IDbConnection 'Dim conn As IDbConnection = New System.Data.OleDb.OleDbConnection Dim conn As IDbConnection = New System.Data.SqlClient.SqlConnection conn.ConnectionString = NorisHelpers.DBHelpers.GetConnectionString(NorisHelpers.DBHelpers.COMMON) Return conn End Function in the above GetConnection() method i have commented out the .net dataprovider for oledb and changed it to .net dataprovider for SQLconnection. this function works fine. But in the authenticate method above at the line Dim ReturnValue As String = cmd.ExecuteScalar.ToString
for some reason its throwing the below error. Run-time exception thrown : System.Data.SqlClient.SqlException - @password is not a parameter for procedure EDSConfirmUpdate. If i comment out the Dim conn As IDbConnection = New System.Data.SqlClient.SqlConnection and uncomment the .net oledb provider, Dim conn As IDbConnection = New System.Data.OleDb.OleDbConnection then it works fine. I also have changed the webconfig file as below. <!--<add key="Common" value='User ID=**secret**;pwd=**secret**;Data Source="ESMALLDB2K";Initial Catalog=cj_common;Auto Translate=True;Persist Security Info=False;Provider="SQLOLEDB.1";' />--> <add key="Common" value='User ID=**secret**;pwd=**secret**;Data Source="ESMALLDB2K";Initial Catalog=cj_common;' />
Hi, I am new to ASP.NET and Visual Web Developer 2005 Express, which I run on Windows Vista. I am currently going through some of the tutorial videos on http://www.asp.net/learn/videos/ . I encountered an error in Lesson 04 and I would have ignored it but it keeps haunting me and now I cannot proceed with the lesson 09 all because of the same error. I would really appreciate it if somebody could help me resolve this because it. General error text The database filename can not contain the following 3 characters: [ (open square brace), ] (close square brace) and ' (single quote) Lesson 4 circumstances
Web.Configis modified to contain the following code just before the closing </system.web> tag:<anonymousIdentification enabled="true"/><profile enabled="true"> <properties> <add name="MyNewProperty" allowAnonymous="true"/> </properties></profile>
I have MS Time Seeries model using a database of over a thousand products each of which has hundreds of cases. It amazingly takes only a few minutes to finish processing the model, but when I click Mining Model Viewer to view the models, it takes many hours to show up. Once the window is open, I can choose model for different products almost instantly. Is this normal?
I broke up my cube into 24 partitions. There are about 630M total fact rows in that cube.
When I open the cube to browse in BIDS or SQL Management Studio it takes very long time to open (I think 30 minutes).
Profiler does not show that it's running a query, but messages like this keep appearing throughout the time it's opening to browse:
Progress Report Begin, 14- Query, Started reading data from the 'p0' partition. Progress Report End, 14- Query, Finished reading data from the 'p0' partition. Progress Report Begin, 14- Query, Started reading data from the 'p10' partition. Progress Report End, 14- Query, Finished reading data from the 'p10' partition.
Database 'TEST' is already open and can only have one user at a time.
I also tried this command but having the same error.
Use Master GO Select * from master.sys.sysprocesses Where spid > 50             And dbid=DB_ID (‘StuckDB’))  -- replace with your database name
Why is taking so long to open/create/render the reports for the first time? Is there any configuration to change this? I don€™t think this behavior is related to Report Execution or cache! I think there is something else going on! Thanks.
