Sleeping Connections
Feb 10, 2004
Hi,
I have written an application in VB6 connecting to a SQL Server 2000 database using ADO. This app is running on the same computer as SQL Server.
What I am seeing now is that each day 2-3 new connections are being created by SQL and these connections have a "sleeping" status and "AWAITING COMMAND" command. Also, when double-clicking a
connection, it's last TSQL statement is empty... This way, connections are piling up.
Does anyone have an idea why this is happening and what I can do to avoid this ? Also, how can I determine what is causing this ?
Many thanks,
Jurgen Sanders
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Sep 27, 2005
Hi
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.
Tx,
TessZA
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Mar 8, 2007
If an MS SQL 2005 Connection is sleeping in the activity monitor, does it mean it's not closed? I'm pretty sure it's closed, just want to confirm. Lately, our DB server got hammered with requests and it reached max-pool size (we implemented caching after that).
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Aug 16, 2000
what does the sleeping process will do
I am running the following stored procedure
the cpu value is increasing by time.
I am killing old process manually.
How to stop the sleeping processing.
CREATE PROCEDURE SP_MONITOR2 AS
select spid, hostname,cpu,status,datediff(mi,last_batch,getdate ())Diff_in_Min
from sysprocesses
where hostname <>'' and
last_batch <>'1900-01-01 00:00:00.000'
order by Diff_in_Min desc
the output is
spid hostname cpu status Diff_in_Min
------ -------------------------------------------------------------------------------------------------------------------------------- ----------- ------------------------------ -----------
47 EADMIN2 3662 sleeping 75
9 SETUP6500 11375 sleeping 60
82 EADMIN2 13271 sleeping 59
7 EADMIN2 5147 sleeping 49
27 EADMIN2 4647 sleeping 49
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Jan 24, 2008
A developer came over and asked me a couple of things
1. Can C# not cleanup SPIDs and just open new ones lieing around
2. Do a large number of spids, even if they are sleeping, cause performance issues?
3. What's the Max # of spids sql server can handle?
BOL ain't too helpful right now
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Mar 8, 2007
Hi, just a quick problem/question. Why do processes in the middle of the package goto sleep? Is there a method of making them go?
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Apr 20, 2001
I have SQL Server 7.0 and I am not able to kill one of the SPID's who is running a SELECT Statement and showing as sleeping.
When I saw in the current activity in EM I see the STATUS as sleeping
COMMAND as SELECT, APPLICATION as Microsoft Transaction server, WAITTIME as 7877 and WAITTYPE as EXCHANGE and CPU 10074
Thanks in advance.
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Jan 6, 2006
I have processes running on the server that show a status of "sleeping" from sp_who and sysprocesses, however they are still running. I run sp_who over and over again and only occasionally the process status shows running, and then switches back to "sleeping" or "defwakeup". I know what all the statuses mean, I just don't know why a running process would ever show as "sleeping". The processes take a very very long time to run as well.
Thanks in advance,
Steve
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Sep 27, 2007
Hi guys,
I may be asking a foolish question but I really need an answer for it.. We have our centralized servere where SQL Server 2005 is installed.... Whenever open the management studio from our desktops, execute some queries (It may be any simple query such as select * from) I find the status of that process 'sleeping'...untill we close the studio or in other words untill that process is killed..
I find the status by Management -> Activity monitor...
Please help me with it...
Has there been anything wrong while setting up Sql Server ?
Please help me ...
Thank you so much...
Saket.
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Nov 3, 2005
I was trying to find the bottle neck on our server while we wererunning a couple very large updates.I ran the following query and noticed there were a couple sleepingspid's that were really eating up the memory. One had a value of16000.I guess my question is was this query still holding on to that memoryeven though the query had finished? Why didn't SQL Server clean it up?select spid,substring(Loginame,1,10) Login,memusage,substring(hostname,1,15) Host,program_name,cmd,statusfrom master..sysprocessesorder by memusage desc
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Jul 20, 2005
HelloI've prepared a small aplication in VS.NET and I use SqlConnection class.Everything is ok, but when I'm trying to disconnect from server usingif (cnSQL->State != ConnectionState::Closed) cnSQL->Close()there is still connection do server present. I have to close connectionbecause I'm trying to drop this database.Have you ever heard about this kind of problem??Trociu--Plain-text over all!!!/**********/write me : trociu@autonom ict pwr wroc plsearch me : gg: 1382729
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Apr 3, 2007
Hi all,
We have a web application with multiple users connecting to SQL Server 2005 database.
Once the users start using the system, I could see in the Process Info from the activity monitor with a several process with status as sleeping and command as Awaiting Command.
I have few questions regarding this for which simple answers would help me ( I searched and couldnt understand from the pages that explained the process information )
My questions are,
1. Does the processes with status sleeping and command as Awaiting Command are needed for the application even after the operations specific to them are complete?
2. Does these process affect the performance ?
3. Does killing these process would affect the application connectivity ?
4. Why do we get several process with status sleeping and command as Awaiting Command? Is this because of the front end programming errors ?
5. What should we do to avoid the increasing number of process with status sleeping and command as Awaiting Command?
Any help would be appreciated.
Thanks in advance,
DBLearner.
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Sep 14, 2006
Dear, Our ASP.NET scripts send SQL statements (as inline SQL or SP) to process the requested job. After the job execution, the process ID stays in the server and waits for next command with sleeping status.Since this process does not go away, next job adds another process and eventually, the server is overloaded with these processes and dies. How can I kill this sleeping processes?Regards,Echo
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Dec 3, 2005
I am using SQL Server 2000. In Enterprise Mgr, under Management/CurrentActivity, I see a list SPIDs.I have a multi-tiered .NET web app that uses ADO.NET to connect to thedatabase. Each time a Stored Proc is called, a new connection is opened, thedata retreieved, and the connection closed and set to Nothing (in VB.NET).Yet, I see several (15 or so) SPIDs for the user ID that the web app uses toconnect to the database.The database is local and private, so I know all connections are from me.What does Status=SLEEPING Command=Waiting Command mean?What will happen when we get 1000's users on the web app?Is SQL doing some kind of connection pooling?
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Jan 17, 2006
Has anyone done this and about pulled thier hair out?
I downloaded visual express for web development with sql express. Running fine. Like SQL so much, decided to pop for the Developer package. I don't know what I was thinking, maybe I was going to pay for popcorn for billy g & family in the home theatre that night...but I digress.
After much consternation and a 4:00 a.m. adventure, I managed to get rid of SQL Express and install the developer edition. Now were fine. Even ran the aspnet_regsql and set up the aspnetdb database.
I'm thinking, back to development here.
I select APP_DATE and if I try to add the ASPNETDB.mdf file I get the application is being used by another process. Please close all applications that might access this file and try again. So, I then try to create a new database file. I get this error:
Connections to SQL Server Files ( *.mdf) require the SQL Server Express 2005 to function properly.
I can create a connection to the aspnetdb database in the database connections. However, as I work with some of the new ASP NET Membership/Role code, I find it doesn't work.
Will most code work if the ASPNETDB.mdf is not set up int he APP_DATA section?
Come on Microsoft, I can't be the only shoe-string developer that is going to try this.
Has anyone done this and resolved how to get these two to play along.
If I upgrade to Visual Studio, will I still be straddled with SQLExpress.
Can I run SQLExpress side by side with SQL Developer addition?
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Jul 23, 2005
Hello all. I have many connections that are sleeping. I can rightclick, kill, up to 2 at a time. It takes about 20 seconds to kill it.Is that normal? I tried to make a stored procedure to kill them but itate all the power of the server, (all users yelled at me at the sametime :o) )Is this length of time normal for killing these processes?ThanksJeff
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Sep 4, 2015
During our DR drill we found that the same code which used to run perfectly fine on our Primary Data Centre is running very slow on Disaster Recovery DB Server and there are Lot's of open transaction with sleeping status and waittype as 'AWAITING COMMAND'.CPU, Memory and disk utilization are good. The ping reply between the app server and the DB server is well within the limit's even blocking is not their, also nothing is reported in the error logs. We are using SQL server 2014 STD 64 BIT on Windows Server 2012.
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Feb 3, 2015
At one of your client sides we have configured Always on with synchronous mode.Also we have schedule rebuild index and update statistics job which runs in night every alternate day. the issue is there are more then 100 sleeping queries which is blocking update statistics job.
I have to stop update statistics job manually once i come to office manually.
Once I have killed blocking sleeping query but then other sleeping query blocked it and so on.
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May 17, 2005
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;' />
Please help. Thanks in advance.
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Jul 20, 2005
Just a quick question about connection management. My application willnever need more than 1 or 2 connections about at any given time. Also, I donot expect many users to be connected at any given time. For efficiency, Iwould like to keep connections alive throughout the lifetime of the objectsrequiring them, rather than opening a new connection, executing code andthen 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 objectand a close when I dispose of it?
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Dec 27, 2007
Hi I have some simple questions of for MS SQL. Say I have a database with a table Called Company. In this table I have Employee's with these columns(EmployeeID<PK>, FirstName, LastName) Now I am inserting some data like this.EmployeeID FirstName, LastName------------------------------------------------------- 1 Bob Smith2 Joe Mitter Now Say I have this situation(this will look weird for this example but for another examples and the stuff I am working on it make sense). Say I have a new Employee Called Jessica White. Jessica must be the second record. So I need to insert it between the 1st and 2nd record. Like I said I am very noob at doing this stuff so I am not sure how I would do it. I first was going to my table and then went to modify. This brought up a blank grid with all my column names. I then started to add all my data in. I found out later to make my life easier I need to enter in certain spots null rows in it to help with formating(otherwise I would have had to figure out a way to do make null rows with c# code). I then went back to this grid and I tried to add a record before the data just like you if you used excel. I quickly found out you can not do that. This resulted me having to recreate the table and reput the all the data back in(this told me I was doing something very very wrong). I was then thinking of writing it with a query and I been playing around with it and still running into problems like say I had a table called test with a coloum called id<PK> and testss(yes bad names just playing around though).So if I did something like this:INSERT INTO testVALUES(2)INSERT INTO testVALUES(1)SELECT * FROM testNow I am trying to figure out how to insert something between rows 1 and 2. Would I have to drop the table or delete all the data and then run a saved copy of my script with the added change or what?My second question is what is a good site that has examples of all the commands(I don't want to read a book on it I have had a oracle sql course and well it was just boring and I did not learn too much.). I think the best way for me to learn is just continue doing my site and picking it up on the file and when I got a problem read about it and ask on the forums. Thanks
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Jul 13, 2001
Very strange event. Installed new machine into NT 4 network, which has a PDC and a BDC. We have copies of all SQL databases on both the PDC and the BDC. I installed SQL 7 on new workstation. Throught Control Panel/ODBC connections I can reach the SQL files on bith the PDC and BDC. Howver when I try to use Enterprise Manager, I can connect to the tables on the PDC, but not the BDC. SQL lists both machines in the server group, but only allows me to access tables on PDC! Here is the Event information that I recived on the BDC:
The computer IVR1 tried to connect to the server NTBACKUPSERVER using the trust relationship established by the MASSCOM domain. However, the computer lost the correct security identifier (SID) when the domain was reconfigured.
How do I fix this?
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Apr 14, 2000
HI all,
I have a problem here. I am having two computers both are loaded windows NT 4.0 AND SERVICE PACK 4 AND ALSO I INSTALLED SQL SERVER 7.0.
Now i want to connect those two servers , so pls anyone suggest me how i have to do.I connected both servers thru HUB.
Pls suggest me..
thank u..
--ram
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Oct 9, 1998
I figure anyone who has done VB and SQL Server might have run into this.
>
> I am set up as a DBO on SQL Server with access to db1 and db2. My default
> is set to db2. From my local machine, I can log through VB(DSN-less) in
> to
> either one without a problem. BUT, if I go to another machine and try to
> log in through VB(DSN-less) to db1, it rejects my login. Here is my
> connect
> string :
>
> UID=xxxxxxx;PWD=pedro;DATABASE=db2;DRIVER={SQL
> Server};SERVER=Athens;DSN=``;
>
> The only thing that changes when I log into db1 is the database parameter-
> "DATABASE=db1".
>
> Am I doing something wrong here? Is there something that needs to be
> setup
> differently in SQL Server? Do I need to put something else into the
> connect
> string?
>
> This happens for the other developers as well, not just me.
>
> Any help would be GREATLY appreciated.
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Apr 12, 2001
I am looking for some ideas on the following DTS challenge: I need to import the data from an Access 97 database into a set of tables(about 25). The location of the database can be anywhere on the users drive(s) and I will need to get the location of the database from a registry setting and use it to define the connection.
Thanks
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Jun 11, 2004
We have a case where a user is using Excel sheet to connect the database on SQL2K and generally his connection runs in the upper 150 in numbers. He generally gets more than 150 connections open.
I know that it's not a good thing, but is there a way to limit it or even kill it after it reaches max?
What are the disadvantages of opening too many connections?
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Sep 7, 2006
I'm getting the classic message "The timeout period elapsed prior to obtaining a connection from the pool" etc when connecting to my SQL Server 2005 Express from a .Net application.
Then I try connecting, simultaneously, from a simple ASP.net thing I wrote just for testing and this works fine. So, then the connection pool can't be full, can it? Or, does each application have its own pool??
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Apr 16, 2004
Ok, yeah, I'm being lazy...
Any comments?
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Feb 9, 2006
Hi
I have heard that SQL Server can support upto 10,000 users,
What if my application , connects to the sql & does not do antything then , why does the SQL server slow down with just 700 users.
I mean just the connection is established & NOTHING further is done.
Thanks
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Nov 29, 2007
hi,
have been looking for ages for somewhere that might be able to answer my question so thought i'd try here.
anyhows, my place of work have goldmine 6.7 running on a server. the problem is that some of the client machines seem to be taking 2 connections to the server when logged into goldmine and some only 1.
when looking at the open sessions it shows a second for some users accessing pipesqlquery. all users show this but only some show it as a second connection.
please any ideas
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Dec 21, 2007
Is there any type of performance gain to using DSN connections? Or any real advantage to using them over DSN-Less connections?
--
If I get used to envying others...
Those things about my self I pride will slowly fade away.
-Stellvia
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Jul 23, 2005
As most of you are aware, when you close a VB.NET connectrion to a SQLserver, the connection doesn't actually drop right then and there.From my tests, using VB.NET 2003 and SQL2K, the connection doesn'ttimeout and drop off for 6 1/2 minutes. How can one force thisconnection to immediately drop off with code?
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Oct 25, 2005
HiI am a dba for sql server recently we are facing problems with the no ofconnections.we have a database called ( x ) every day almost million users is using thatdatabse after some time the cpu showing 100 percent utilization an errorthrowing like odbc error connection so in that case no one is able to connectto the server.when we pause it then restart the server for some time it looksgood then again it will go to 100 % utilization.but there is no blockingoccuringif anyone knows this problem please helpyour help would be appreciated.Thanks--Message posted via SQLMonster.comhttp://www.sqlmonster.com/Uwe/Forum...eneral/200510/1
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