Timeouts - Disk Queues
Jul 20, 2005
Hi
Got a strange problem.
For some reason our web client box times out occasionally. Maybe a
few times a day.
Nothing appears in the logs.
What I do know is that the disk queue ramps up to <high>(think top of
the graph), processor queue jumps up and the tps drops to 0 (naturally
enough!) along with reduced pagefile usage. Usually at this time the
tps is between 20 and 300. Running a pair of mirrored 18gb scsi disks
for the whole server (yeah yeah) and a whopping 640mb memory. Oh and
a single piii 1 gig. Sql2k standard vanilla, server2k.
What server trace events is it worth my catching to try and get a
better Idea of what may be causing this? No major jobs (backups etc
seem to be occuring at these times).
Cheers
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Sep 22, 2006
Hi, All!
Could you please help me in my problem?
I develop Service Broker applcation, SB has 20 queues, also I have one Activation Procedure which carries out following actions:
CREATE PROCEDURE proc_ms_Activation
AS
BEGIN
WAITFOR (RECEIVE TOP(1) message_type_name, message_body, conversation_handle, message_id FROM Queue1)
-- process message, save statisctisc and etc
END
Problem in that: when I execute command WAITFOR (RECEIVE TOP (1) message_type_name, message_body, conversation_handle, message_id FROM Queue1) I should specify a name concrete Queue, for example "... FROM Queue1 ". I would like to use one procedure for processing all Queue.
How I can design my application that one Activation Procedure processed messages from all Queues?
Thank a lot for help.
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Apr 2, 2008
Hello, please help!!
I have spent days searching the web and forums for an answer to this simple question and cannot find an example.
I have built a service broker application on sql server 2005. The application puts some xml on an incoming queue which is basically a few parameters to be used in a query. This queue will then call a stored proc which does some business logic and puts the resulting results in another queue also in xml.
I have written a test harness in SQL to put messages on the inbound queue and then some sql to retrieve the returned code from the outbound queue.
What I want to do is be able to convert the SQL which does this into .net code to be used by an application. i.e. write in .net some code to put xml on a queue and then write some .net code to retrieve xml from another queue.
I wouldn't have thought this would be a difficult thing to do and would have been done hundreds of times, but unable to find anything to simply send and retrieve XML to service broker queues....
thanks for your help.. its really needed. I found some links, but they are really vague and often doing select statments in service broker or something like this. I don't want to call any sql, just send and recieve XML on the queues.
any example code that does this, would be really helpfull
kind regards,
David Weeden
Database Developer
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Dec 28, 2006
hello,all
I am new to Sql 2000,I installed sql 2000 database in C disk,but Now I found my C disk space is smaller than before,So I want to move my databse(include data and structure) from C Disk to D Disk(its space is very large) .
is it possible to do it ?
if its can be done ,do I need to change my asp.net program source code (exp: chaneg my crystal report connectstring ) ?
thanks in advanced!
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Sep 10, 2007
If I return the Average, Minimum, and Maximum values for the counter Physical Disk: Avg. Disk Queue Length, and those values are 10, 0, 87 respectively, which value do I use to compute the Avg. Disk Queue Length for a 4 disk array(RAID 10): Average, Minimum, or Maximum? The disk(lun) is on a SAN.
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Nov 13, 2007
-- Initialize Control Mechanism
DECLARE@Drive TINYINT,
@SQL VARCHAR(100)
SET@Drive = 97
-- Setup Staging Area
DECLARE@Drives TABLE
(
Drive CHAR(1),
Info VARCHAR(80)
)
WHILE @Drive <= 122
BEGIN
SET@SQL = 'EXEC XP_CMDSHELL ''fsutil volume diskfree ' + CHAR(@Drive) + ':'''
INSERT@Drives
(
Info
)
EXEC(@SQL)
UPDATE@Drives
SETDrive = CHAR(@Drive)
WHEREDrive IS NULL
SET@Drive = @Drive + 1
END
-- Show the expected output
SELECTDrive,
SUM(CASE WHEN Info LIKE 'Total # of bytes : %' THEN CAST(REPLACE(SUBSTRING(Info, 32, 48), CHAR(13), '') AS BIGINT) ELSE CAST(0 AS BIGINT) END) AS TotalBytes,
SUM(CASE WHEN Info LIKE 'Total # of free bytes : %' THEN CAST(REPLACE(SUBSTRING(Info, 32, 48), CHAR(13), '') AS BIGINT) ELSE CAST(0 AS BIGINT) END) AS FreeBytes,
SUM(CASE WHEN Info LIKE 'Total # of avail free bytes : %' THEN CAST(REPLACE(SUBSTRING(Info, 32, 48), CHAR(13), '') AS BIGINT) ELSE CAST(0 AS BIGINT) END) AS AvailFreeBytes
FROM(
SELECTDrive,
Info
FROM@Drives
WHEREInfo LIKE 'Total # of %'
) AS d
GROUP BYDrive
ORDER BYDrive
E 12°55'05.25"
N 56°04'39.16"
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Nov 15, 2006
Hello,
I am trying to setup a test cluster and am having an issue. When I try to create the resource of a physical disk it takes both the drive e: and drive q: and doesn't seperate them into two physical disks as resources. This means when I try to associate the quorum disk it links the to physcial disk resource of drive e and q. Then when I try to install SQL2k5 I get the warning about installing SQL on the quorum disk. Am I missing something? Is there a way to seperate e and q onto two physical disk resources so I can specifically associate the quorum to q and the sql to e or should I be setting the quorum disk to a majority node set? Thanks in advance.
John
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Jul 27, 2006
I'm just getting around to understanding notification services in sql 2005 and I have been working through some examples. I'm curious as to why there are always two queues and two corresponding services being set up even when both queues/services exist in the same database. Here is my ultimate goal. I want to have triggers put messages on the queue for various stored procedures to handle asynchronously - i.e. table xyz is updated, and I need a stored proc to take the updated values and possibly generate or update rows in another table. When I tried to set up one queue and one service, nothing ever seems to get put on the queue:
Create Message Type TestMessageType Validation = Well_Formed_XML;
Create Contract TestContract (TestMessageType Sent By Any);
Create Queue TestQueue;
Create Service TestService ON Queue TestQueue(TestContract);
Begin Tran;
Declare @DialogHandle UNIQUEIDENTIFIER;
Begin Dialog Conversation @DialogHandle
From Service TestService
To Service 'TestService'
On Contract TestContract
Send On Conversation @DialogHandle
Message Type TestMessageType (N'<message>Hello World</message>');
End Conversation @DialogHandle;
Commit Tran;
Select * From dbo.TestQueue;
(nothing is ever returned)
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Mar 10, 2006
Hello,
I'm trying to do a very simple example of sending a message from Initiator queue to Target queue. The result is no messages are delivered.
Here's the code:
DECLARE @conversationHandle UNIQUEIDENTIFIER
BEGIN DIALOG CONVERSATION @conversationHandle
FROM SERVICE GmiInitiatorService
TO SERVICE 'GmiTargetService'
ON CONTRACT GmiContract
WITH ENCRYPTION = OFF;
SEND ON CONVERSATION @conversationHandle MESSAGE TYPE GmiMessage ('test');
END CONVERSATION @conversationHandle
All three queues are empty (Initiator, Transmission, Target). When I comment out the last line ("end conversation"), the messages get stuck in the Initiator queue.
Please help!!
Thank you.
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Apr 19, 2006
Hi
We can create a queue on a filegroup for performance reasons however what about the sys.transmission_queue which could have messages backing up when the target is down.
What are your thoughts.
Cheers
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Feb 20, 2001
Hello,
this is my configuration :
1) 3 disks in RAID5 that hold the SQL data
2) 1 disk in RAID0 that holds the only paging file.
What will happen to the SQL data (DB) when the disk that holds the paging file crashes?
Kindest regards,
Luc.
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Nov 13, 2006
Hi everyone! I have a very brief question... I have 10 queues in my database and each of them are sent equal number of messages... There are instances where they execute/activate the stored procedures very fast but there are times where they don't, does anyone have an idea why this happens?
Thank you very much for taking the time to read my post. :)
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Aug 14, 2006
Hi There
In terms of scaling out Service Broker to hundreds of instances, would it be better from a performance perspective so have one queue with all the messages coming in(obviously with a high number for max_queue readers), or create a number of queues and spread the messages across them ? Or is there no significant difference.
The one reason i am leaning towords multiple queues is so that is poison messages are found or a something lese goes wrong with a queue not all messages are affected, however creating multipple queues makes it more complex and required more administration ?
Any general best practice when it comes to this ?
Thank You
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Jun 20, 2007
Hi
We have problems with duplicate messages in Service Broker queues. We have tried the "fire and forget" method.
Senario
Initiator doing SEND and END Conversation , target doing RECEIVE and End Conversation ,
Sql servar agent job runing every minute doing End conversation with cleanup in sys.conversations_endpionts queue.
We are runing 5000 - 10000 messages per minute.
When the clean up job is running we get som duplicte messages in the target queue.
Enviroment
Two separate machines runing Sql Server 2005 Standard Editon SP2
Initiator Machine
CREATE MESSAGE TYPE [TransactionStatisticsSend] AUTHORIZATION [dbo] VALIDATION = WELL_FORMED_XML
CREATE CONTRACT [TransactionStatistics] AUTHORIZATION [dbo] ([TransactionStatisticsSend] SENT BY ANY)
CREATE QUEUE [dbo].[TransactionStatisticsQueueActive] WITH STATUS = ON , RETENTION = OFF
ON [PRIMARY]
CREATE SERVICE [TransactionStatisticsServiceActive] AUTHORIZATION [dbo] ON QUEUE [dbo].[TransactionStatisticsQueueActive] ([TransactionStatistics])
CREATE ROUTE [Route::TransactionStatisticsServiceStat,0705DBB2-8CBA-43BC-A8FF-774A27F8ABC0] AUTHORIZATION [dbo] WITH SERVICE_NAME = N'TransactionStatisticsServiceStat' , ADDRESS = N'tcp://EBSDBCONFIG1A:4022'
CREATE REMOTE SERVICE BINDING [RSB::TransactionStatisticsServiceStat] AUTHORIZATION [dbo] TO SERVICE N'TransactionStatisticsServiceStat' WITH USER = [Proxy::BtsDebitServiceStat] , ANONYMOUS = OFF
CREATE ENDPOINT [EBSDBCURR1A_BROKER]
AUTHORIZATION [BTSTULLENtsappl]
STATE=STARTED
AS TCP (LISTENER_PORT = 4022, LISTENER_IP = ALL)
FOR SERVICE_BROKER (MESSAGE_FORWARDING = DISABLED
, MESSAGE_FORWARD_SIZE = 10
, AUTHENTICATION = CERTIFICATE [EBSDBCURR1A]
, ENCRYPTION = REQUIRED ALGORITHM RC4)
ALTER PROCEDURE [dbo].[Bts_SP_TransactionStatPrepare]
(@TransferID varchar(30))
AS
declare
@RowCount Int,
@ErrorSave Int,
@Msg xml,
@dialog_handle UNIQUEIDENTIFIER
Begin
BEGIN TRY
set @msg = (Select
Regtime,
SendPartShortName,
RecPartShortName,
MsgType,
From btslogactive.dbo.StatTransferlog Tl
where TransferID = @TransferID
FOR XML RAW)
BEGIN DIALOG CONVERSATION @dialog_handle
FROM SERVICE [TransactionStatisticsServiceActive]
TO SERVICE 'TransactionStatisticsServiceStat'
ON CONTRACT [TransactionStatistics]
WITH ENCRYPTION = OFF ;
SEND ON CONVERSATION @dialog_handle
MESSAGE TYPE [TransactionStatisticsSend]
(@msg) ;
END CONVERSATION @dialog_handle
END TRY
BEGIN CATCH
SELECT
ERROR_NUMBER() as ErrorNumber,
ERROR_MESSAGE() as ErrorMessage;
END CATCH
End
Target Machine
CREATE MESSAGE TYPE [TransactionStatisticsSend] AUTHORIZATION [dbo] VALIDATION = WELL_FORMED_XML
CREATE CONTRACT [TransactionStatistics] AUTHORIZATION [dbo] ([TransactionStatisticsSend] SENT BY ANY)
CREATE QUEUE [dbo].[TransactionStatisticsQueueStat] WITH STATUS = ON , RETENTION = OFF
, ACTIVATION ( STATUS = ON , PROCEDURE_NAME = [dbo].[Bts_SP_TransactionStatUpdateBroker] , MAX_QUEUE_READERS = 1 , EXECUTE AS N'dbo' ) ON [PRIMARY]
CREATE SERVICE [TransactionStatisticsServiceStat] AUTHORIZATION [dbo] ON QUEUE [dbo].[TransactionStatisticsQueueStat] ([TransactionStatistics])
CREATE ROUTE [Route::TransactionStatisticsServiceActive,D8A1A78B-CEAD-4C63-B3B3-3C986D2AB3AA] AUTHORIZATION [dbo] WITH SERVICE_NAME = N'TransactionStatisticsServiceActive' , BROKER_INSTANCE = N'D8A1A78B-CEAD-4C63-B3B3-3C986D2AB3AA' , ADDRESS = N'tcp://EBSDBCURR1A:4022'
CREATE ENDPOINT [EBSDBCONFIG1A_BROKER]
AUTHORIZATION [BTSTULLENtsappl]
STATE=STARTED
AS TCP (LISTENER_PORT = 4022, LISTENER_IP = ALL)
FOR SERVICE_BROKER (MESSAGE_FORWARDING = DISABLED
, MESSAGE_FORWARD_SIZE = 10
, AUTHENTICATION = CERTIFICATE [EBSDBCONFIG1A]
, ENCRYPTION = REQUIRED ALGORITHM RC4)
Activation procedure
ALTER PROCEDURE [dbo].[Bts_SP_TransactionStatUpdateBroker]
AS
DECLARE @MessageType sysname
DECLARE @ConversationHandle uniqueidentifier
DECLARE @MessageBody XML
DECLARE
@RegTime datetime,
@SendPartShortName varchar(30),
@RecPartShortName varchar(30),
@RC int
BEGIN TRANSACTION;
WHILE (1=1)
BEGIN
WAITFOR
(
RECEIVE TOP (1)
@MessageType = message_type_name,
@MessageBody = message_body,
@ConversationHandle = conversation_handle,
@SeqNo = message_sequence_number
FROM [TransactionStatisticsQueueStat]
), TIMEOUT 5000;
IF (@@ROWCOUNT = 0)
BEGIN
ROLLBACK TRANSACTION
RETURN
END
IF (@MessageType = 'http://schemas.microsoft.com/SQL/ServiceBroker/EndDialog')
BEGIN
END CONVERSATION @ConversationHandle
BREAK
END
ELSE IF (@MessageType = 'http://schemas.microsoft.com/SQL/ServiceBroker/Error')
BEGIN
END CONVERSATION @ConversationHandle
BREAK
END
ELSE IF (@MessageType = 'TransactionStatisticsSend')
BEGIN
Begin try
SET @RegTime = @MessageBody.value('(/row/@Regtime)[1]', 'datetime')
SET @SendPartShortName = @MessageBody.value('(/row/@SendPartShortName)[1]', 'varchar(30)')
SET @RecPartShortName = @MessageBody.value('(/row/@RecPartShortName)[1]', 'varchar(30)')
SET @MsgType = @MessageBody.value('(/row/@MsgType)[1]', 'varchar(30)')
.
End try
BEGIN CATCH
SELECT
ERROR_NUMBER() as ErrorNumber,
ERROR_MESSAGE() as ErrorMessage;
END CONVERSATION @ConversationHandle
BREAK
END CATCH
-- EXEC @RC = SP_XXXXX
END
END CONVERSATION @ConversationHandle
BREAK
END
END
COMMIT TRANSACTION
RETURN
Sql Server Agent job procedure
ALTER PROCEDURE [dbo].[Bts_SP_Del_Conversation_Endpoints]
AS
begin
DECLARE c_PurgeConversationEndpoints CURSOR FAST_FORWARD
FOR SELECT conversation_handle
FROM sys.conversation_endpoints
with (nolock)
WHERE is_system = 0
AND [State] = 'CD';
OPEN c_PurgeConversationEndpoints;
DECLARE @DialogHandle UNIQUEIDENTIFIER;
FETCH NEXT FROM c_PurgeConversationEndpoints
INTO @DialogHandle;
WHILE @@FETCH_STATUS = 0
BEGIN
END CONVERSATION @DialogHandle WITH CLEANUP;
FETCH NEXT FROM c_PurgeConversationEndpoints
INTO @DialogHandle;
END
CLOSE c_PurgeConversationEndpoints;
DEALLOCATE c_PurgeConversationEndpoints;
end
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Jan 4, 2007
Hi,
I want to know that how is it possible to achieve mirroring for the service broker queues in the database?
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Jan 4, 2007
Hi,
I want to know that how is it possible to achieve mirroring for the service broker queues in the database?
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Oct 11, 2005
Ok, I'm stumped. I have a database which has a table that stores documents. Each document has a primary key. For years, I've been notifying an external program that a new document has arrived in the db by firing a trigger on the table. Trigger calls xp_cmdshell, which calls an external program which enqueues a message on a message queue.
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Sep 13, 2006
I have read from a variety of sources that using the "WITH CLEANUP" option on
a "END CONVERSATION" statement is bad and unnecessary. (Question
#1) Is this true???
My code does not work properly if I don't
use the "WITH CLEANUP" option. My code leaves closed conversation records in the
queues if I leave out the "WITH CLEANUP" option. The "END CONVERSATION"
statement is executing properly and flagging the conversation record as closed
but the records don't get deleted. All the messages are going back and forth
properly too.
My code is based on the HelloWorld ServiceBroker sample
which does not use "WITH CLEANUP". When I run the sample scripts everything
works great and the conversation records are deleted. However, this sample does
not uses an activation stored procedure to receive messages and respond with the
results. When I copy and paste the receive messages sample code into an
activation stored procedure is when the problem comes up. It's the same code!
(Question #2) Why am I getting different results depending
how the code is executed/activated???
This is could be a tough one. I
just hope somebody else has seen it too and figured it out. Thanks for the
help!
Thanks,
Greg Van Mullem
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Jul 19, 2007
Is there a way for a .NET application to receive a notification when a service broker queue has been updated with a new message? I tried using SqlDependency on an SB queue but I got an "invalid" error in my notification handler.
Such a notification would be much better than having to poll the queue every N seconds.
Thanks
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Dec 23, 2005
Hello All:
I've been experimenting with the new SQL Server Service Broker, and I think I've discovered some interesting behavior. Service Broker relies on "Queues" to store messages that need to be processed. Service Broker operates by sending a message from one Queue (the INITIATOR Quque) to another Queue (the TARGET Queue). A Queue can have an "Activation Stored Procedure" associated with it. This procedure is what actually processes the messages in the Queue.
The first behavior I obeserved related to the setting of a Queue's RETENTION parameter. The RETENTION parameter indicates whether or not the Queue will retain a copy of the messages it receives. By default, the parameter's value is "OFF" (meaning it will not retain messages). In the Activation Stored Procedure of my TARGET Queue, I used "sp_send_dbmail" to send an e-mail message. I wanted to capture the "conversation_handle" (a uniqueidentifier that identifies a particular message) and include it in the body of the e-mail. I was unable to capture it, because the Queue's RETENTION parameter was "OFF". When I tried to capture the conversation_handle from the INITIATOR queue (whose RETENTION parameter was "ON"), I was successful. The moral of the story is you apparently need to have RETENTION = "ON" if you need to capture information from a Queue.
The second behavior I observed relates to the setting of a Queue's MAX_QUEUE_READERS setting. This setting allows you to automatically invoke multiple instances of the Activation Stored Procedure. As messages come into the Queue, the Queue creates an additional instance of the Activation Stored Procedure up to the number you specified in the MAX_QUEUE_READERS setting. This allows parallel processing of messages in the Queue. There is also a programming technique called a "RECEIVE LOOP" which is used for processing messages. In the RECEIVE LOOP, you have a parameter called WAITFOR which tells the Queue whether it should stay on constant alert for new messages or whether it should time out after a specified number of seconds.
If you have the Queue wait indefinitely (by not specifying a TIMEOUT value in the WAITFOR statement) and you have invoked multiple copies of the Activation Stored Procedure, the procedure will remain in memory indefinitely. Therefore, if you make a change to the code of the Activation Stored Procedure, the change will NOT be reflected in the Activation Stored Procedure until you change the STATUS of the Queue. I had changed my procedure so that it would not send an e-mail, but the e-mails kept coming. The e-mails did not stop until I executed an ALTER QUEUE statement. I ran "ALTER QUEUE queue_name WITH STATUS = OFF;" and then I ran "ALTER QUEUE queue_name WITH STATUS = ON;" After that, the changes were reflected in the procedure.
Be aware of this behavior as you design your Queues.
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May 7, 2004
Hi all,
Ok here goes,
I have a three tier system using SQL server 2000, we are currently experiencing IO bottle necks on our SCSI Raid 10 array, which holds the Data and the logs in separate partitions.
So my options as I understand it are:
Get Enterprise edition
or
Get another physical raid 10 array and separate the logs and data i.e. data on one array and logs on the other array.
I would like to try the latter but I am totally unsure how much difference this will make or whether it will make any difference at all.
Does anyone know how much performance increase I will get from using two arrays as opposed to one?
Any other advice on this scenario would be greatly appreciated.
Thanks
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Jul 30, 2001
Hello,
Has anyone experienced timeouts on SQL Server 2000 that happen at regular intervals?
Regards,
Brent.
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Apr 21, 2004
Anyone else expirencing some heavy duty timeouts?
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Apr 1, 2008
of query timeouts in SQL Server Management Studio?
I have increased the timeout setting in many places and still receive a timeout message within 40 seconds for certain update queries that involve large tables and many records. The only workaround is to break up the job into smaller queries but this makes management, unmanageable.
Is there a solid alternative to SQL Server Management Studio?
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Jul 23, 2005
hi!I am having some timeout issues.I am running sql 2k with 3gig available ram.I did a 600,000 record delete on a table that gets written to by theactive/production application and my application timed out when it wasdoing the delete.why did stored procedures that ran fine before I started the largedelete slow down?Some of the procedures which slowed down were accessing the same tablewhere i was doing the delete.Thanking you in advance!!parez
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Mar 29, 2007
I am getting Timeout Errors quite often and cannot figure out why. I am using Enterprise Library 2.0 when accessing the database. It is not from any particular function or page either and when I check the database there may only be 2 or 3 connection from my app. Any ideas of what could be causing this? Below is my error and stack.
Error: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Stack:
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 Microsoft.Practices.EnterpriseLibrary.Data.Database.OpenConnection() at Microsoft.Practices.EnterpriseLibrary.Data.Database.ExecuteReader(DbCommand command) at HM.Security.SecurityData.GetAllUsers(Int32 filter) at HM.Admin.Security.SecuritySearch.SetUpAutoFill() in f:InetpubWwwroothomemiSectionsactSearch.aspx.cs:line 74 at HM.Admin.Security.SecuritySearch.Page_Load(Object sender, EventArgs e) in f:InetpubWwwroothomemiSectionsactSearch.aspx.cs:line 26 at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
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Apr 27, 1999
Hello all,
I am managaing an NT infrastructure that supports a web application. The web server is configured to use an ODBC System DSN to access data on an SQL server over a 100MB private segment. When users run a particular query through the web page, they get an ODBC "Timeout Expired" message.
Does anyone know a fix for this. I could not find anything that explicitly identified this problem in MS Support. The query runs fine from an Eneteprise Manager T-SQL window both on the server and remotely.
Thanks in advance,
Ed Molinari
Technical Architect
Eamerald Solutions
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Sep 5, 2001
A timeout issue is occurring resulting in following error.
This issue is sporadic and may be related to network.
This error occurs on the client: Microsoft OLE DB Provider for SQL Server error `80040e14`
OLE/DB provider returned message: Timeout expired
"conn_info".asp, line 444
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Jul 23, 2005
Subject: SQL server job timeouts?We have a job that uses WinHTTP inside a stored procedure. We haveanother SP wrapper that runs this for a couple hundred records.When we add this as a job using SQLAgent it times out half way. Runningit from SQL Query analyser and it completes to the end.Anyway to set the timeouts for jobs?
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Jul 20, 2005
I've had my SQL server database running for two years now without aproblem.However, just today one of the main tables started returning an error.The table is contained within a database called engineering. I backit up once a week and the file size is up to about 40 MB.The error returned when trying to return data from one table(DbLucent) is:"[Microsoft][ODBC SQL Server Driver]Timeout expired"I can open/query any of the other tables in the database. I can opendesign table for this table. But it won't return any query.I'm debating whether to restore the database from the last backup.Any suggestions would be appreciated. Being located reomotely, Irather not fly back to the city where the server is and work on itthere either.-David
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Feb 21, 2006
Our current project involved into managing NTFS hierarchical folders structured by multi-level customers and associated projects for them. Essentially each folder level represents one level of customer hierarchy or project root. Both have different subfolders and user access rights for them based on generic XML templates. The folders resided on file servers across the country and should be accessible in ordinary way NTFS file shares are allowing. LAN/Intranet MS AD Win2003 / SQL2005 environment.
The folder management system basically have to keep the folder structure in tact with changes in underlying managing application logic. That involves such operations as creating a new folder with subfolders, copying a folder with its content into another folder branch (which may be on the same or another server and place), deleting a folder/content, renaming a folder, applying NTFS access rights to folders and subfolders for users according generic templates. As all these actions are unreliable and some tasks may take hours to complete, SSB approach seems to be the viable solution. Some tasks involved have to be done within 10 minutes, others (are prolonged) have to be scheduled for overdnight run. Windows service like EA sample may be used to start the actual NTFS related tasks. Content transfer involves WMI remoting with robocopy tool on target machine (for better network utilization), other related tasks make use of WMI APIs and probably do direct (i.e. synchronous) calls to the remote target file server.
At this stage, making atomary executable modules that do just one functionally isolated task like DirCopy, DirCreator, DirRename, DirDelete, DirUserAccess seems like somewhat logical choice.
The questions starting to arise from SSB queues planning to adoption of ExternalActivator sample to run these atomic executables. The problem is that if SSB messages contain atomic tasks for these executables, they needed to be syncronized in two ways - by execution precedence (create or copy dir first, then apply users' access rights) and transactionally (only when all related tasks succeed, the appropriate feedback action and event log writing can be taken.
I can imagine two implementation scenarios below.
Case A. Create common queue for directory creating, content transfer and access rights.
In that case ExternalActivator has to be either extended & re-designed or it has to activate another Activator-Coordinator (middleway) executable, that would actually read the queue and, based upon the message type, run the appropriate atomary executable. In that scenario, the queue processing would be stalled because if the previous task was content transfer and lasts, say access rights to them can't be started before the transfer task has been finished OK. That in turn probably will require running multiple instances of the atomary tasks and using conversation groups, wouldn't it? What would be the most reliable and simple way to achive that?
Case B. Dedicated queues for each atomary executable modules.
Neither EA changes nor extra Activator-Coordinator middleway executable required. But because the atomary task-oriented queues are not syncronized with each other the queues internal conversation groups wouldn't help much... That means if a directory not yet exists, userRights module have to wait. But, what if we are transferring directories from path X to Y, based on what the userRights module knows to wait? With zero asynchronous design experience I'm lost here...
Hope I described the app domain understandably, thanks for hints leading to the working solution!
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Dec 16, 2003
I'm having major problems with SqlClient Data provider connections in my application. I'm using Win 2003 Server with SQL Server 2000 (both on the same machine), and my application is developed in VB.NET.
I'm using the following db connection string:
Data Source=(local);Initial Catalog=database;Uid=user;Pwd=password;max pool size=100;
As you can see max pool size is set to 100. The SQL Database has it's MAX_CONNECTIONS property set to >32000.
The symptoms are that at seemingly random times, not nessecarily during peak hours, the application becomes extremely slow and stops responding. The error message that is beeing generated is "Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding."
After monitoring and debugging, I've found two things.
1) At random times, zero-three times a day, the number of database connections (according to performance monitor) rises from normally 2-8 up to 20-25. After a while, usually 10-60 minutes, it drops back to normal. This is directly related to when the timeout errors occur. It doesn't seem to happen more often during peak load, for some reason. I suspect there is connection leakage in the application, but I've done extensive debugging, and I just can't find any. Also, since the peaks occur randomly and I can't reproduce the error in my development environment, I have no solution to this problem. A few weeks ago, the application ran during heavy load without this problem for 7 days. Before and after that, there have been errors at least every second day. That confuses me even more.
2) The number of connections (monitored in perf mon) never reach above 25. Why? I'm using SQL Server enterprise edition, it's connection limit is over 32000. ADO pool size is 100, and I can't find anything else that would limit the amount of concurrent connections. I'm totally confused. Why does number of connections never rise above 25? Is there a setting hidden somewhere that I just can't find? Also, according to Performance Monitor, I don't get any failed connects, I just get failed commands. Maybe that's a clue? Could the problem some kind of deadlocks in the database that causes timeout?
I realize this entire post is rather confusing. It reflects the state of my mind, I guess, after working around the clock on this issue for a month :)
Any help is deeply appreciated!
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Jun 24, 2004
I have a basic UPDATE that's something along the lines of:
UPDATE LocalTable SET LocalColumn = RemoteColumn
FROM LocalTable INNER JOIN server.catalog.dbo.RemoteTable ON (...)
After running in Query Analyzer for ten minutes, I get:
Server: Msg 7399, Level 16, State 1, Line 1
OLE DB provider 'SQLOLEDB' reported an error. Execution terminated by the provider because a resource limit was reached.
[OLE/DB provider returned message: Timeout expired]
OLE DB error trace [OLE/DB Provider 'SQLOLEDB' ICommandText::Execute returned 0x80040e31: Execution terminated by the provider because a resource limit was reached.].
I checked the linked server settings in EnterpriseManager and both timeout settings are at 0 (no timeout). Any idea how I can remove whatever timeout is causing this?
Anyone know how remote join performance compares to moving remote data over via DTS, running an UPDATE, and dropping the data?
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