SQL Azure DB Connection

I am noticing that when establishing connection to SQL Azure DB it takes long time to establish the first connection and then subsequent connections are faster, what could be the cause of this?

This is because the client library (SqlClient, ODBC, JDBC, for example) keeps a connection pool underneath. Basically, the first connection takes more time because goes through the whole aspects of the connection. Once released by the application,
it is kept alive in the background and next time there is a connection attempt, this connection is re-used.
Please, let me know if you have more questions.
Thanks
Luiz Santos

Similar Messages

SQL Azure with Azure Virtual Machine inside Virtual Network - How to connect

Hi Team,
I have one typical scenario where there is one Windows Application I wan to run from my Windows Azure Virtual Machine which is inside Azure Virtual Network (which has its DNS and ADFS and etc..)
Because its Virtual Network, We can't access internet within that network, apparently Virtual Machine can't access SQL Azure. So, How would we resolve this scenario.
Application is running great from my local system so, its accessing SQL Azure Database from my system. So, Application or SQL Azure or connection or such areas has no issue.
Regards, Brijesh Shah

Hi Brij,
Thanks for your reply.
To add a DNS server in an Azure Virtual network, you can refer to the link below:
http://msdn.microsoft.com/en-us/library/azure/dn275925.aspx
To obtain a public Azure-provided DNS server IP addresss, you can run "ipconfig/all" in another Azure VM which is not a virtual network which has DNS server defined. After you add a DNS server in the virtual network that VM belongs to, please restart
the VM to update the change.
However, since you mentioned that you are using a customed domain, I am not quite sure if any other configuration should be done for your domain.
Best regards,
Susie

Performance is too slow on SQL Azure box

Hi,
Performance is too slow on SQL Azure box (Located in Europe)
Below query returns 500,000 rows in 18 Min. on SQL Azure box (connected via SSMS, located in India)
SELECT * FROM TABLE_1
Whereas, on local server it returns 500,000 rows in (30 sec.)
SQL Azure configuration:
Service Tier/Performance Level : Premium/P1
DTU       : 100
MAX DB Size : 500GB
Max Worker Threads : 200
Max Sessions     : 2400
Benchmark Transaction Rate      : 105 transactions per second
Predictability : Best
Any suggestion would be highly appreciated.
Thanks,

Hello,
Can you please explain in a little more detail the scenario you testing? Are you comparing a SQL Database in Europe against a SQL Database in India? Or a SQL Database with a local, on-premise SQL Server installation?
In case of the first scenario, the roundtrip latency for the connection to the datacenter might play a role.
If you are comparing to a local installation, please note that you might be running against completely different hardware specifications and without network delay, resulting in very different results.
In both cases you can use the below blog post to assess the resource utilization of the SQL Database during the operation:
http://azure.microsoft.com/blog/2014/09/11/azure-sql-database-introduces-new-near-real-time-performance-metrics/
If the DB utilizes up to 100% you might have to consider to upgrade to a higher performance level to achieve the throughput you are looking for.
Thanks,
Jan

Performance too Slow on SQL Azure box

Hi,
Performance is too slow on SQL Azure box:
Below query returns 500,000 rows in 18 Min. on SQL Azure box (connected via SSMS)
SELECT * FROM TABLE_1
Whereas, on local server it returns 500,000 rows in (30 sec.)
SQL Azure configuration:
Service Tier/Performance Level : Premium/P1
DTU       : 100
MAX DB Size : 500GB
Max Worker Threads : 200
Max Sessions     : 2400
Benchmark Transaction Rate      : 105 transactions per second
Predictability : Best
Thanks,

Hello,
Please refer to the following document too:
http://download.microsoft.com/download/D/2/0/D20E1C5F-72EA-4505-9F26-FEF9550EFD44/Performance%20Guidance%20for%20SQL%20Server%20in%20Windows%20Azure%20Virtual%20Machines.docx
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com

Need a better way than killing connections in SQL Azure - Governor

I've been pushing the boundaries of SQL azure (S0 and S1) recently.
I'm at a point where normal T-SQL code needs to be optimized for SQL azure, I was surprised that all Microsoft have done was enhance the governor process and kill the connection rather than slow down the connection, guess this was the easy path to
use.
Simple T-SQL statements like MERGE need to be rewritten to support large data (1 million rows). Given you need to batch core T-SQL commands you need to answer yourself is this the correct approach. Also had the same issue using SQL Bulk Copy
but tweaked a few settings to get around that issue.
S0 & S1 still haven't got the same IO as Web/Business edition hence Microsoft need to fix this ASAP.
Is SQL Azure worth that extra hassle compared with other DB engines?
Micatio Software Free IIS Azure Web Log App

Hi Jan,
Its not the command timeout (for example set as 0 in SQL management studio).
I've seen it many times where the last wait type is the LOG GOVERNOR.
A few minutes later the status is set as KILLED/ROLLBACK. I can get around the issue by batching the MERGE statement and it works fine.
I would understand if the MERGE was running for 1-2 hours and I've seen the same thing occur when using a bulk insert command in C# (resolved by limiting the batch size, streaming, etc.).
The azure version is Microsoft SQL Azure (RTM) - 11.0.9230.176.
The log governor does kill connections, this is documented on a few sites and MSDN. LOG GOVERNOR was a SQL Enterprise feature in the standalone product except Microsoft in there wisdom ported it across into SQL Azure to resolve users running bad queries
on the infrastructure.
Micatio Software Free IIS Azure Web Log App

Cannot connect to SQL Azure

Hello,
I have tried everything I could think of and still did not manage to connect to SQL Azure server instance I have created.
1) Using the SQL Server Management Studio 2008 R2 -
    I get: "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. ...."
    I have the 1433 port allowed by my firewall (even placed a machine in the DMZ) and I have added my IP address to the SQL Azure firewall.
2) Using this app: https://onlinedemo.cerebrata.com/SQLAzureClient/default.aspx
   I get "Unable to retrieve the list of databases...."
   Now, in this case enabling the TCP port 1433 from my network is not even required as I this tools connects directly to SQL Azure. And yes, I have added the firewall rule on my SQL Azure Server.
3) Using this tool: http://hanssens.org/tools/sqlazuremanager/
   I get a message similar to what I get at 1)
The only thing that works is the "Test Connection" performed on SQL Azure site.
Can someone please help?
Regards,
Luc

I cannot connect either using that Omega tool but I have no problem from SSMS R2.
Let's try something simple: connecting from Project Houston:
Check "Allow Microsoft Services access to this database"
Go to http://sqlazurelabs.com. Click Project Houston CTP 1 on left.
When asked for data center, click the one where your db is deployed.
Agree to terms
Enter full database name - somename.database.windows.net -
along with database name, username, and password. Note: if you didn't allow Microsoft Services access to your database, you'll get an error
You should now be connected to your database.
If that worked, at least you know your database is up and running correctly. Now try connecting from SSMS R2. The parameters should be identical,
except you don't have to specify which database to connect to.

Cannot connect to SQL Azure by allowing Domain Name in Firewall

*.database.windows.net:1433/tcp is getting resolved as IP address in corporate firewall but the corporate firewall is configured to allow only domain names.Is there a way to connect to SQL Azure without domain name getting resolved into IP.
All the http traffic are allowed by firewall for blobs,queues and tables.

Hello,
Did you means that you connect to the SQL database with IP address? If I understand correctly, you can not rely on the IP address when connect to Windows Azure SQL database.
SQL database is hosted on a virtual machine at the Microsoft datacenter and shared resource with other databases. Static IP addresses are not supported on Windows Azure virtual machines, it is use dynamic address.
What's more, one SQL Database keep at least three SQL Server databases replica that are distributed across multiple physical servers in a single data center and automatic cluster failover when a hardware fails on one server. In that case, the real IP that
is behind server might change in any moment.
Regards,
Fanny Liu
Fanny Liu
TechNet Community Support

Connection to SQL Azure client application

Dear all,
I have setup an SQL azure database that will be accessible from a Desktop client application.
So that when I need to connect to the database, I need to go to the Admin portal and then allows my current PC IP to the firewall rules tables acess. When this is done my client application is allowed to access the database.
I am actually accessing the database from a local WCF services hosted as an NT service which have the connection string to the SQL azure database.
By testing different scenario I have found weird issue and hope you can help on the best way to approach it :
Question 1 : Client application PC IP adress
When I distribute my application to a customer which try to run it, it cannot access to the azure database simply because its client IP address PC is not in the list of the firewall on my azure account. As I do not know in advance the IP address of my customer,
what is the way to allows the connection automatically ?
I understand that it can be a security feature in a way to authorize a user or not to the data.
Question 2 : Connection string password
Actually the connection string to my SQL azure database is visible in the config file of my Nt service host for my WCF endpoint. The problem is that the password is in clear text here and I would like to avoid that. To solve that issue I guess I have
2 posiibilities :
- Encrypt the connection string password from my config file, but then how Azure will be able to understand it fro decrypting ?
- Host my WCF service under azure ? if yes how ? will it be better it terms of performance as well ?
Thnaks for your feedback and help
regards

Hello,
1. SQL Database use
server-level firewall to prevents all access to SQL Database server until the client computers have permission.The firewall grants access based on the originating IP address of each request.
So, you should configure the firewall rule by adding the IP address of the client PC before connect to the SQL Database.
2. Windows Azure provides a secure
certificate store where you can maintain your certificates. After encrypt sensitive data in your configuration files, you can deploy certificate with a key pair to Windows Azure and it can be used for encryption/decryption.
Reference:
Wiki: Windows Azure SQL Database Connection Security
Regards,
Fanny Liu
Fanny Liu
TechNet Community Support

Connect BizTalk Server Configuration with Sql Azure - version 2013 R2

Hi,
My data resides on Sql Azure. I need to create BizTalkRuleEngineDb on Sql Azure using Microsoft BizTalk Server Configuration wizard. Subsequently manage rules from Business Rule Composer.
I am unable to connect to Sql Azure from BizTalk Server Configuration application. Without this i could not create BizTalkRuleEngineDb on Sql Azure. I gave the following details:
Database server name: <servername>.database.windows.net,1433
User name: <username>
Password: <pwd>
When i click configure button, a message pops "The database server you specified cannot be reached...."
All i need from BizTalk is to create Business Rules Engine DB on Sql Azure. Then I would like to manage rules using Business
Rule Composer connecting to Sql Azure BizTalkRuleEngineDb.<o:p></o:p>
My business logic will programmatically access BizTalkRuleEngineDb db and execute rules using Microsoft.RuleEngine.dll<o:p></o:p>
Is this a feasible solution? I would like to see your inputs.
Any help is appreciated.
Thanks,
Tushar

First I would suggest you to perform sanity check to confirm if SQL server connectivity is perfect.
1) Verify the MSDTC Settings on both the servers:- It should resemble as below.
2) UDL Test:- Create a new "Text Document"(new notepad file) rename it to ABC.udl, double click and give the SQL server details and Test connection. If this fails it means BizTalk is not at all able to connect with SQL and in this
case BizTalk Application is just a victim of Network connectivity issue.
You can also refer the below article-
Resolving the issues you may face during BizTalk Runtime Configuration
Thanks,
Prashant
Please mark this post accordingly if it answers your query or is helpful.

Is there a step by step guide to connecting a Drupal website with SQL Azure?

The company is upgrading the Drupal website and the goal is to have a live database by connecting the Drupal SQL database with he SQL Azure database. Does anyone have guide/step by step process for implementing connectivity between Drupal and SQL Azure?

Hi,
Thanks for posting here.
Recommend you to see "
Best Practices for Drupal CMS on Azure Websites " written by Sunitha Muthukrishna which talks about How to migrate existing Drupal site to Azure Websites and Copy database to MySQL in Azure Web Sites
" Mysqldump " tool is one of the preffered approaches to Copy database to MySQL in Windows Azure Web Sites
Here is another document that talks about Migrating Drupal to azure and
Copy the Database which might help.
Hope this helps you.
Girish Prajwal

Error connecting SQL Azure - Network access for Distributed Transaction Manager (MSDTC) has been disabled

Sometimes I have an error connecting SQL Azure. The error occurs in an asp.net application and in a windows service running on VM in Azure. Error details:
System.Data.Entity.Core.EntityException: The underlying provider failed on Open. ---> System.Transactions.TransactionManagerCommunicationException: Network access for Distributed Transaction Manager (MSDTC) has been disabled. Please enable DTC for network
access in the security configuration for MSDTC using the Component Services Administrative tool. ---> System.Runtime.InteropServices.COMException: The transaction manager has disabled its support for remote/network transactions. (Exception from HRESULT:
0x8004D024)
   at System.Transactions.Oletx.IDtcProxyShimFactory.ReceiveTransaction(UInt32 propgationTokenSize, Byte[] propgationToken, IntPtr managedIdentifier, Guid& transactionIdentifier, OletxTransactionIsolationLevel& isolationLevel,
ITransactionShim& transactionShim)
   at System.Transactions.TransactionInterop.GetOletxTransactionFromTransmitterPropigationToken(Byte[] propagationToken)
   --- End of inner exception stack trace ---
   at System.Transactions.Oletx.OletxTransactionManager.ProxyException(COMException comException)
   at System.Transactions.TransactionInterop.GetOletxTransactionFromTransmitterPropigationToken(Byte[] propagationToken)
   at System.Transactions.TransactionStatePSPEOperation.PSPEPromote(InternalTransaction tx)
   at System.Transactions.TransactionStateDelegatedBase.EnterState(InternalTransaction tx)
   at System.Transactions.EnlistableStates.Promote(InternalTransaction tx)
   at System.Transactions.Transaction.Promote()
   at System.Transactions.TransactionInterop.ConvertToOletxTransaction(Transaction transaction)
   at System.Transactions.TransactionInterop.GetExportCookie(Transaction transaction, Byte[] whereabouts)
   at System.Data.SqlClient.SqlInternalConnection.EnlistNonNull(Transaction tx)
   at System.Data.ProviderBase.DbConnectionPool.PrepareConnection(DbConnection owningObject, DbConnectionInternal obj, Transaction transaction)
   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal&
connection)
   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.Open()
   at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.<>c__DisplayClass1.<Execute>b__0()
   at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
   at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
   --- End of inner exception stack trace ---
   at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
   at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection()
   at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
   at System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClassb.<GetResults>b__9()
   at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
   at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
   at System.Data.Entity.Core.Objects.DataClasses.EntityReference`1.Load(MergeOption mergeOption)
   at System.Data.Entity.Core.Objects.DataClasses.RelatedEnd.DeferredLoad()
   at System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.LoadProperty[TItem](TItem propertyValue, String relationshipName, String targetRoleName, Boolean mustBeNull, Object wrapperObject)
   at System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.<>c__DisplayClass7`2.<GetInterceptorDelegate>b__2(TProxy proxy, TItem item)

Hello,
I am not an expert in MSDTC but as we know,SQL Azure Database does not support
distributed transactions. This means that SQL Azure doesn’t allow Microsoft Distributed Transaction Coordinator (MS DTC) to delegate distributed transaction handling.
One common cause of MSDTC getting involved in Entity Framework applications is the fact that we close and reopen the same connection as needed (i.e. for each query that is executed).To avoid the stack from opening and closing the connection multiple times,
you can simply open the connection explicitly and run the queries in the same connectio.
The following thread is about a similar issue, please refer to:
http://answers.flyppdevportal.com/categories/azure/sqlazure.aspx?ID=d705a8cf-cba4-494c-96f6-96a136bd29e3
What's more, you can also try the workaround that involves setting the Enlist option of the SQL Azure connection to false. For the detail explanation, please refer to:Entity
FrameWork and SQL Azure
Regards,
Fanny Liu
Fanny Liu
TechNet Community Support

Connection between two SQL Azure Databases

We have a requirement to move data (partial data in a table based on policy conditions) between two SQL Azure Databases. Want to know the best possible way to do this.
We are not looking at Data Sync Framework - as this is only a Preview version and we have to use this in an ongoing basis in Production and the volume of data is quite high.
The option that we have currently is to use an on premise stored procedure - that will have two link servers to the source and target SQL Azure Databases and do the data movement in one transaction.
Are there any other better options to do this ? Any pointers will be helpful.

Hi Kothai Ramanathan,
According to your description, if you just want to moving part of the data from a huge table between two different SQL Server database, you can use
SQL Server replication to sync the part of data via articles. However, in SQL Azure database, it does not support SQL Server replication, if you want to migrate database, as other post, you
can use Data-Tier Application Import and Export or other ways.
In addition, for just moving the part of data, you can also create two Linked Servers between local SQL Server database and two different SQL azure database. For example, you can get the changed data from the first Linked
Server and saved the data to Local database, then insert these data to the other azure database via the second Linked Server.
For more information, see:
http://azure.microsoft.com/blog/2012/09/19/announcing-updates-to-windows-azure-sql-database/
http://blogs.msdn.com/b/sqlcat/archive/2011/03/08/linked-servers-to-sql-azure.aspx
Regards,
Sofiya Li
Sofiya Li
TechNet Community Support

Cannot refresh data in Excel Services with SQL Azure databases

I am using Excel Services on a SharePoint Online.
I get my data from a SQL Azure. When i create my Excel repor with Excel 2013 pro I have no problem. So I upload my file on my Sharepoint and try to refresh data.
Connexion : Power Query - RPT_Event_ByEventType
Erreur : Erreur sur site (OnPremise) : Sorry, the data source for this data connection isn't registered for Power BI. Ask your Power BI
admin to register the data source in the Power BI admin center.
I do not understad why I get that error because my data source is on Azure why It told me "OnPremise" ?

hi,
>> this button of excel gets just address of web and have button for import it
i test it by rest API project , but doesn't work, do you know how it is work?
Do you mean that you don't know how to get the table? You may input the site address into the address box, and then click go button nearby, select the table you want to import into the Excel. Then click import button.That also works for rest API,
and your rest API should get the data that you want
By the way, this is the forum for discussions about Excel develop(VBA ,customization), better to go to TechNet forum for Excel for Excel features question, so that you could get more professional help.
Best Regards
Lan
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SQL Azure - Intermittent The wait operation timed out

I have a website engine which runs a few hundred "white label" sites. It's hosted on Azure with a SQL Azure Business database. Generally everything is fine - it all works and runs at a good speed.
However, throughout the day I get maybe 40 or 50 of the error:
System.ComponentModel.Win32Exception: The wait operation timed out
Please don't refer me to the connectivity blog at http://blogs.msdn.com/b/sqlazure/archive/2010/03/22/9982979.aspx as this seems to refer to problems where you just can't connect. My problem is that it's fine most of the time, but I still get these
intermittently.
This is sometimes on the main database, but we're also using a database for sessions and this gets the errors too. Both databases are on the same server.
I also get errors like:
An existing connection was forcibly closed by the remote host
and:
System.Data.SqlClient.SqlException: The service has encountered an error processing your request. Please try again. Error code 40143. A severe error occurred on the current command. The results, if any, should be discarded.
and, when evil bots are hammering the site:
System.Data.SqlClient.SqlException: Resource ID : 1. The request limit for the database is 180 and has been reached. See 'http://go.microsoft.com/fwlink/?LinkId=267637' for assistance.
Each website can potentially have a Google footprint of around 10,000 pages. The result it that bots are hitting the sites regularly, indexing lots of pages for hundreds of sites. I also have some worker roles doing data work. The database is clearly busy!
I am hoping to add 2 or 3 times the number of sites that I currently have to the "engine".
I am looking at efficiency where possible, but the sites are clearly under a fair load from bots and visitors.
My question is, will one of the upgrades from Business to S2, P1, P2 or P3 resolve these problems? The financial cost of these database instances stagger greatly so I wouldn't want to update and find I'm left with the same problems but am paying many times
more each month.
Thank you in advance.

Hello,
For Web/Business edition database, the maximum limit of concurrent requests is 180. Beyond this limit, you will receive error.
The Max woker threads for Standard(S2) is 100, you should upgrade your database to Permium tier.
The concurrent requests limit of premium database varies depending on the reservation size of a premium database. For example, for P1, the max worker threads is 200.
Reference:Azure SQL Database Resource Governance
Azure SQL Database Service Tiers and Performance Levels
Regards,
Fanny Liu
If you have any feedback on our support, please click here.
Fanny Liu
TechNet Community Support

Link a Crystal Report report with an SQL Azure database

Hi,
I want to use my database on SQL Azure in Crystal Report. So I want to link my reports with data contained not in a local db, but in a SQL Azure one.
Insiede Crystal Report I have created a new ADO connection to my SQL Azure, providing server, db, user, password, and Crystal Report have recognized the database. But when I go to the Database Expert and I try to set this ADO connection inside my report,
I recieve this error:
"Not Implemented
Source ADODB.Connection
L'operazione richiesta non è supportata dall'oggetto o dal provider (operation not supported by the object or by the provider)"
Why? How can i use my SQL Azure data in my Crystal Report reports?
Thanks

Hi Delfins,
Please create a UDL file to test the connection, ensure the connection is fine and then use the same connection string in your Crystal Report.
For UDL file, you can refer to:
http://msdn.microsoft.com/en-us/library/e38h511e(VS.71).aspx
Hope this helps,
Raymond
Raymond Li - MSFT

SQL Azure DB Connection

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