How Can You Find Active Connections To A Database So You Don't Have To Wait To Get A Failure When One Exists.
May 8, 2008
Is there a way to find active connection to a database so you don't have to wait for a restore or similar operation to fail. (Which take forever).?
Is there a SMO method or a transact SQL command or something that can be used in an application to detect active connections?
I don't want to have to wait forever to get a failure when you can't perform a operation that require that there be no active connection such detach a database. I want to be able to tell when I can perform a operation which requires no active connection and when I need to use a task without out dropping the connection like copying the schema using SMO methods.
However if there are no connection I can perform a detach copy and attach to create a new database which is considerable faster.
I have a Microsoft Cluster running on Server 2003 Entrprise. SQL 2000 8.00.2039 (SP4). 5gb physical memory installed.
With the databases online we run a test failover from the Cluster administrator. It takes about 30-40 seconds and completes without generating any Server Event log errors nor SQL log errors. Everything looks good from an administrative stand point.
However, when we test with running a series of queries to the databases, then failover, we notice that it can take up to 3 or 4 minutes before some of the databases will respond. Connections are not refused, they just sit there.
How can we troubleshoot this or does anyone have a similiar experience with this scenario?
We have (had) an active/active cluster. 2 physical machines, each running their own instance, clustered together. Node1/Ins1 and Node2/Ins2.
Node2 failed and Ins2 failed over to Node1 as it should. Node2 required that we rebuild the server (rebuild = reinstall O/S). Now we need to get Node2 back into the cluster and get Ins2 failed back over to Node2.
Does anyone know, for certain, the correct steps to accomplish this? Obviously, we could backup everything and completely destroy Ins2 and recreate it on Node2 then rejoin the cluster. But I'm looking for something less destructive.
Is it possible to reinstall SQL, then rejoin the cluster, and then fail Node2 over? Or will there be registry conflictions?
Any help would be appreciated. Also, if you have any links to some official documentation, that would be great too.
Hi. I have to buy a license for MS SQL Server 2000 and I need to know how many active connections I will need. I could try by running the application with multiple users and see how many connections there are.
The questions is: How can I know the number of active connections to the Server?
We just installed SQL service pack 4. I am now finding that when doing a sp_who2 active, there are a lot of connections that are blocked by itself. The common factor is they all have a status of 'sleeping'. The strange thing is that even though it shows the connection is blocked, it is in fact not and will still return results. Below is a snapshot of a portion of what the sp_who2 active returns:
SPID Status Login HostName BlkBy DBName 53 sleeping sa TRACKER 53 dbABC 58 sleeping sa TRACKER 58 dbCDE 64 sleeping sa TRACKER 64 dbSTA 66 RUNNABLE User12 PC24 . master 70 sleeping User5 ANALYSIS 70 dbBML 74 sleeping sa TRACKER 74 dbCDE 76 sleeping sa TRACKER 76 dbPTS 83 sleeping User5 ANALYSIS 83 dbANA 86 DORMANT User11 CPTDB . NULL
Has anyone seen this? Is it related to the installation of service pack 4? (We have installed the services pack on many other SQL servers, but have not come accross this before.
Greetings,I am seeking information related to this subject.BOL suggests backing up the active transaction log immediately after afailure, so that the backup can be used in a recovery scenario if necessary.This is the relevant text from BOL "Transaction Log Backup":----//The transaction log backup created at 8:00 P.M. contains transaction logrecords from 4:00 P.M. through 8:00 P.M., spanning the time when thedatabase backup was created at 6:00 P.M. The sequence of transaction logbackups is continuous from the initial database backup created at 8:00 A.M.to the last transaction log backup created at 8:00 P.M. The followingprocedures can be used to restore the database to its state at 10:00 P.M.(point of failure).Restore the database using the last database backup created.1.. Create a backup of the currently active transaction log.---// end of excerptIf the failure results in loss of the instance and/or the log's parent db,how would we back up that log? Even if we could, what confidence would wehave that the backed up log was not corrupted at failure time?Thanks,PSG
How to check number of active connections ? I know two ways of doing it ..
1. run sp_who2
2. in Current Activity in Enterprise Manager ..
If what ever number I am seeing is the Active Number of Connections ..then
I am facing a problem here ..
In My serevr I have 75 Users licenses are configured for Per server option .. Through a Java aplication when Developer tried to capture any SQL server Connection it says following error ..
Details : [MERANT][SQLServer JDBC Driver][SQLServer]Login failed. The maximum simultaneous user count of 75 licenses for this 'Standard Edition' server has been exceeded. Additional licenses should be obtained and installed or you should upgrade to a full version.
If I see from Sp_who2 and Current Activity , I can see only 37 Connections ...?
Why is so .. If I am having 75 configured and 37 live in sp_who2 ..why I am getting that error message ?
Is there other way to see Actual Number of Connections made to server ?
I am trying to find the list of active connections on SQL SERVER , more and more granular way ...like below , I know a way using active monitor or Profiler or some DMVs give me some list , but is there a way to find what is the server name ,instance name connectedc to it , who is the clinet connected to it , whats the application being used now?
what database it is connected to it ? what login being used to connect ? what table and column being used right now and what kind of DML or DDL are happeming ?
I want to create a report and find Dependancay evaluation so that we will re architech or re design the existing databases ...
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,Where does Sql server store the most current active T-SQLstatements? Is there a system table or stored procedure(documented orundocumented)that will show you the active sql statements beingexecuted. For eg: in oracle you can query v$sql to see all the sqlstatements executed by each session.I know that you can use Enterprise manager, but was wondering if youcan run a query via query analyzer to look at it.Any help is appreciated.ThanksGeetha
Due to a SQL 2014 cluster installation failure related to security while setting up the primary node, I had to remove the node and any related installation programs from the node and redo the installation again. However I am unable to use the machine name as the SQL network name during the instance configuration, I get the following:
Microsoft.SqlServer.Chainer.Infrastructure.InputSettingValidationException: The SQL Server failover cluster instance name "MachineName" already exists as a server on the network. Specify a different failover cluster instance name.I am still getting the same name since the node name "MachineName" is listed under the cluster name. I have used machine name as SQL network name without an issue. I do not have any existing SQL machine name in network using same machinename which I want to use for this installation.
FROM DISK='\MYMACHINEe$BackupsReportingServicesReportServerLog.bak'
WITH NORECOVERY, FILE=2,
MOVE 'ReportServer2005' TO
'G:DataReportServer.mdf',
MOVE 'ReportServer2005_log' TO
'J:LogsReportServer_Log.ldf';
GO
Msg 4038, Level 16, State 1, Line 1
Cannot find file ID 2 on device '\MYMACHINEe$BackupsReportingServicesReportServerLog.bak'.
Msg 3013, Level 16, State 1, Line 1
RESTORE LOG is terminating abnormally.
I see file ID 2 identifying the log file. I've never done a restore like this - using copy_only and backing the database and log into separate .bak files, so maybe I'm misunderstanding something here.
i need to check that the column exist in the table if yes the update/insert value in the column else i need to add the new column like new browser name in the table.
I have textboxes that work as checkboxes on my form. I have a stored procedure that brings a set of values back. I need to see if the specific values are in the dataset. If so, I put an X in the textbox if that value is in the dataset. How do I do this? [URL] .....
Is there a way you can find out how many conneections to a database there may be before running (for example) a restore procedure to warn that it wil fail?
I am in the process of migrating SQL Server 2000 to SQL Server 2005. Moving one user database at a time to SQL Server 2005. Is there anyway I can list the DTS packages referenced by each databases. All our DTS packages are stored in the database. Will the query to system or meta database will help? Thank you, Gish Smith
I am using SQL 6.5 and I would like to know (using Isql/w) the number of users connected to my server at any given time. Thanks for your help in advance.
I'm currently setting up a Tabular Model to do some research between several fact tables. In this example i have two fact tables (table 1 and table 2) which I've created a 1 to 1 relationship on phone number. Typically I create a relationship between these tables to find common data between the two. However, in this case I am trying to figure out the best way to model the data so that I can easily surface data from one table that does not exist in the other. I would liken this to a LEFT JOIN or a WHERE NOT EXISTS in SQL.
Table 1 has all of the data and Table 2 Only has a subset of the data from Table 1. What I'm trying to do here is display what attributes in Table 1 may play a part in records not existing in Table 2. What is the best way to model this?
We're getting an error where we can't add a login with the full dns name of a user - domain.xyzuser, for example. Get an error 15401, "Windows NT user or group domain.xyzuser' not found". The domain has a different Netbios name and DNS domain names, so we can add the user when we use the form "netbiosnameuser". So far so good.
Unfortunately, we have another application - Office Share Point Server whose shared services provider won't run, giving errors in the event log every 60 seconds that "Windows NT user or group 'domain.xyzuser' not found".
It looks as if SQL insists upon listing users in the form netbiosdomainnameuser, and applications that look for domain.xyzuser simply fail to authenticate.
When my default.aspx page loads I get this error for the connection to my SQL 2005 DB. 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 have already gone to Surface Area Configuration to ensure that Remoting with both Named Pipes or TCP/IP is enabled and it's set to both for remoting.I verified that my local account has access to the DB.Not sure what else to check.
We have a previous SQL 2012 cluster that emails us when a new database is added. I am unable to figure out why we get this error any time we add a new database to it, and also it prevents us from adding a new availability group to this cluster because of this error.
I also am unable to figure out what profile it is talking about as this was setup before me and I am not a DBA.
My site works fine in VWD2008 express, but I get this error when I try to use it on my live website. 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. According to this article: http://support.microsoft.com/kb/914277 I am supposed to:
1. Click Start, point to Programs, point to Microsoft SQL Server 2005, point to Configuration Tools, and then click SQL Server Surface Area Configuration. Ok, there is no such program in this folder. The only thing in there is "SQL Server Error and Usage Reporting"... The other thing I am greatly concerned with is this: All is want is for my webpages to be able to access my database for user authentication. I DO NOT want to grant the internet rights to remote connect to my database.
I get the following error and have been trying to figure out why I keep getting it. Initially, I had placed my project under wwwroot folder and ran it under IIS and it gave this error. Then I moved it to my local C drive and same thing. I am sharing this project with two other co-workers and all our config files and code files are same...they don't get this error but I do. I checked that SQL Server Client Network Utility has TCP/IP and the 'Named Pipes' enabled. I thought maybe I have setting in the Visual Studio 2005 that I'm not aware of that's causing this problem...it can't be the server since my co-workers aren't having this error and can't be anything in the code since all of us are sharing this project through vss. I dont' think using different version of .net framework can create this error. I changed the version from 2.0 to use 1.1x and it gave same error... Any help would be greatly appreciated. Thanks in advance.
Server Error in '/RBOdev' Application.
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace:
[SqlException (0x80131904): 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)] System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +739123 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188 System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject) +685966 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +109 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +383 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +181 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +170 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +130 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +28 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +424 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66 System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +496 System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +82 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105 System.Data.SqlClient.SqlConnection.Open() +111 System.Web.DataAccess.SqlConnectionHolder.Open(HttpContext context, Boolean revertImpersonate) +84 System.Web.DataAccess.SqlConnectionHelper.GetConnection(String connectionString, Boolean revertImpersonation) +197 System.Web.UI.WebControls.WebParts.SqlPersonalizationProvider.GetConnectionHolder() +16 System.Web.UI.WebControls.WebParts.SqlPersonalizationProvider.LoadPersonalizationBlobs(WebPartManager webPartManager, String path, String userName, Byte[]& sharedDataBlob, Byte[]& userDataBlob) +195 System.Web.UI.WebControls.WebParts.PersonalizationProvider.LoadPersonalizationState(WebPartManager webPartManager, Boolean ignoreCurrentUser) +95 System.Web.UI.WebControls.WebParts.WebPartPersonalization.Load() +105 System.Web.UI.WebControls.WebParts.WebPartManager.OnInit(EventArgs e) +497 System.Web.UI.Control.InitRecursive(Control namingContainer) +321 System.Web.UI.Control.InitRecursive(Control namingContainer) +198 System.Web.UI.Control.InitRecursive(Control namingContainer) +198 System.Web.UI.Control.InitRecursive(Control namingContainer) +198 System.Web.UI.Control.InitRecursive(Control namingContainer) +198 System.Web.UI.Control.InitRecursive(Control namingContainer) +198 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +692
Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832
I have a table with the following columns employeeSessionID, OpDate, OpHour, sessionStartTime, sessionCloseTime. I need to see how many users remain active per hour. I can calculate how many logged in per hour, but I am stumped on how to count how many are active per hour. I have a single table that stores login data. I have created a query that pulls out the only the data needed from the table into a temp table using this query. Also note it is possible that the sessionCloseTime is null if the device has not been logged out this would need to be counted a active.
TABLE NAME #empSessionLog Contains the time stamp data OpDate, sessionStartTime and sessionCloseTime. OpDatesessionStartTimesessionCloseTime 2015-01-202015-01-20 14:32:59.1302015-01-20 14:33:14.6299166 2015-01-202015-01-20 06:58:33.7302015-01-20 15:27:16.9133442 2015-01-202015-01-20 09:56:22.8402015-01-20 17:56:29.7555853 2015-01-202015-01-20 05:59:18.6132015-01-20 14:05:19.0426707
[code]....
can see how many sessions logged in per hour with the following statement:
SELECT opDate, FORMAT(DATEPART(HOUR, sessionStartTime), '00') AS opHour, Count(*) AS Total FROM #empSessionLog Group BY opDate, FORMAT(DATEPART(HOUR, sessionStartTime), '00') Order BY opDate, FORMAT(DATEPART(HOUR, sessionStartTime), '00') ASCResults: opDateopHourTotal 2015-01-20041
[code]....
Where I am stuck is how do I count the sessions that remain active per hour until the session is closed with the sessionCloseTime.
