Mysteriously Max Out On User Connections
Mar 1, 1999
Recently, my SQL Server has started getting:
"Unable to connect. The maxinum of '100' configured user connections are already connected. System Administrator can configure to a higher value with sp_configure."
The server has to be rebooted to recover.
What's odd is that this occurs during the weekend when only about 5-8 connections are used by various system processes. I can't tell yet what is sucking up the connections.
We use SQL 6.5 sp4 on NT4.0 sp3 for DEC Alpha. We are also using SQL Mail, Seagate Backup (with SQL drivers) and some cgis that talk to the database.
Any thoughts would be appreciated.
Darin Drewrey
DBA
Extensis Corp
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Apr 5, 2001
Develpers complain that Sql server is slow
We running 4 databases about 400 MB each.(hotel reservations ...)
Buffer cache ( 99.8) but sometimes it goes down to (62.0)
memory configuration Dynamic
Do we really need more memory for 50 users or what should I check in the first place ?
Thanks
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Oct 27, 2000
We are using SQL Server 7.0. Can anyone tell me the difference between setting max connections to 150 versus setting it to 0 for unlimited. We have an application that was running slow with the 150 connections set. We changed it to 0 for unlimited and now the application flies.
Can anyone explain this? Does SQL Server do something different with these settings?
Thanks!
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Nov 27, 2000
I'm locked out of my SQL server because user connections are set at '5' and apparently there are already '5' users connected.
So.. I can't login as SA or anyone to change the option. We've rebooted, disconnected from the network, and still '5' users seem to be connected.
What could be causing this.. Or how can I override the connections without logging in.
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Mar 8, 2001
I'm running SQl Server 7.0 SP1.
Currently the number of simulteneous user connections is set to 0 (0=unlimited).
But one of remote users when trying to connect to the server is getting sql error message that "There are more then 10 users connected".
Should I change "user connections" server configuration?
Thank you
Lena
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Feb 9, 1999
Hi guys,
Help me please to clarify following situation.
My application has 20.000 users.
How many simultaneously user connections should I'll set?
Thanks,
Alona
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Jul 27, 1999
I am trying to shrink my tempdb using the following sql 6.5 commands:
sp_dboption 'tempdb', 'single user', true
dbcc shrinkdb(tempdb)
I get the following message: "Attempt to set 'tempdb' database to single user mode failed because the usage count is 3. Make sure that no other users are currently using this database and rerun CHECKPOINT."
When I do a 'sp_who active' it returns about 5 spids but they are things like Mirror Handler, Lazy Writer, Checkpoint Sleep, RA Manager, and Select. I am not able to 'kill' the spids. I get 'Only users processes are able to be killed.' How do I identifiy the 3 users that sql is saying are connected to the tempdb database? And how do I remove the 3 users?
Thanks in advance.
Kevin
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Aug 24, 1998
Hi all!
In SQL 6.5, if I increase my user connections, should I also increase the amount of RAM allocated to SQL?
Any help would be appreciated.
Thanks
Toni
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May 11, 1999
I need to know the number of client licences that i require for a SQL Server. I want to monitor the
Server for a period of a week or so to find out the max..no of user connections during that time
so that i can fix the no. of user connections parameter.
i have tried using the foll Perf monitor counters :
No of open user connections
Client Count
Max Client Count
Client Limit
and am still confused about the numbers.
Can anyone throw some light on the difference in these counters and which one do i go by for
calculating my licenses .
Thanks
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Mar 29, 2006
I am in the process of installing 7 remote desktop computers that are furnishing data to a SQL server. We will also have 40-50 Managers/Supervisors who will have access to the database for information retrieval. Are there any tools available that would allow me to monitor who is connected to the Server? My main interest in monitoring are the 7 desktops which are permanently connected to the database. Until we have some history, I would like to make certain that we can maintain a good connection between the desktops and the server
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Apr 25, 2007
I select these columns:
TABLEONE: SEC
TABLETWO: B_DATE and E_DATE (they are numbers – not dates); RATE (is a number)
I first calculate the difference between E_DATE and B_DATE and between a chosen date and B_DATE
creating the new columns GG_CED_C and GG_MAT_C.
These new columns are calculated perfectly (they make the difference
between the two dates according to the 30/360 date count convention) and don’t give me any problems. They are all filled with numbers.
I’m able to use these new columns to make other calculations. For example I succeed in calculating
RATE/GG_CED_C* GG_MAT_C
but if I try to calculate
RATE/360*GG_MAT_C AS RATEO
the result is that in some records I have my new column RATEO correctly calculated, while in some other records there is no value in the column.
For example:
B_DATE E_DATE RATE GG_CED_C GG_MAT_C RATEO
20061229 20070630 3,995 180 90 0,99875
20061229 20070630 4,185 180 90
Dates are identical and so are GG_CED_C and GG_MAT_C: why don't
I have the result in the second record????
SELECT
SEC, B_DATE, E_DATE, RATE, GG_CED_C, GG_MAT_C,
RATE/ 360 * GG_MAT_C AS RATEO
FROM (
SEC, B_DATE, E_DATE, RATE, GG_CED_C, GG_MAT_C
(YEAR2 - YEAR1)*360 + (MONTH2 - MONTH1)*30 + (DAY2 - DAY1) AS GG_CED_C,
(YEARRIL - YEAR1)*360 + (MONTHRIL - MONTH1)*30 + (DAYRIL - DAY1) AS GG_MAT_C,
FROM (
SELECT
A.SEC, , B_DATE, E_DATE, RATE,
TRUNC(B_DATE/10000,0) AS YEAR1 ,
TRUNC(MOD(B_DATE,10000)/100,0) AS MONTH1 ,
CASE
WHEN MOD(B_DATE,1000)= 229 THEN 30
WHEN MOD(B_DATE,1000)= 228
AND MOD(TRUNC(B_DATE/10000,0),4) > 0 THEN 30
ELSE MIN(MOD(B_DATE,100),30)
END AS DAY1,
TRUNC(E_DATE/10000,0) AS YEAR2 ,
TRUNC(MOD(E_DATE,10000)/100,0) AS MONTH2 ,
CASE
WHEN MOD(E_DATE,1000)= 229 THEN 30
WHEN MOD(E_DATE,1000)= 228
AND MOD(TRUNC(E_DATE/10000,0),4) > 0 THEN 30
ELSE MIN(MOD(E_DATE,100),30)
END AS DAY2,
TRUNC(&DRIL/10000,0) AS YEARRIL ,
TRUNC(MOD(&DRIL,10000)/100,0) AS MONTHRIL ,
CASE
WHEN MOD(&DRIL,1000)= 229 THEN 30
WHEN MOD(&DRIL,1000)= 228
AND MOD(TRUNC(&DRIL/10000,0),4) > 0 THEN 30
ELSE MIN(MOD(&DRIL,100),30)
END AS DAYRIL,
FROM TABLEONE A, TABLETWO C
What's happening?
After what I've seen in this query I'm wondering if SQL is reliable
when it comes to calculations (after all its main duty is to query data and not to make calculations among them)(?????.
Please give an explanation to this mystery.
Thank you.
Anna - Verona (Italy)
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Jul 20, 2005
I'm running a DB using MSDE (2000) that is interfaced by 2 differentades running on PCs with Access 2000 Runtime. One of the ADEs is apackage accounting system that is very solid and stable, the other isa custom application that I wrote (much less solid and stable). Thecustom app only deals with a select few tables in the database, andthe table in question is not one of those.With alarming regularity(daily), records are getting deleted out of aparticular table. I've set up a couple of dummy records in the tableand put a delete trigger on the table that creates record in a 'log'table that tells me the user and the time that the records aredeleted.The deletion (all records in the table) always occurs during businesshours (never over the weekend or at night) and the user responsiblevaries among 3 or 4 different users. 2 of those users don't even haverights to that table, so I'm really confused how those logins couldcause a delete on the table they don't have access to!??!As far as I can tell, this is only happening to this particular table( I hope!).Is there a way that I can get more information on the process ormachine or anything else that is behind the deletion?
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Oct 16, 2001
How do I "KILL" all user connections in one go?
I need to perform a daily restore and have to manually kill multiple
user connections, its very time consuming. Is there an easier way?
Id be grateful if you can help me!
Many thanks,
Lauryn
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Nov 27, 2000
I'm locked out of my SQL server because user connections are set at '5' and apparently there are already '5' users connected.
So.. I can't login as SA or anyone to change the option. We've rebooted, disconnected from the network, and still '5' users seem to be connected.
What could be causing this.. Or how can I override the connections without logging in.
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Oct 19, 2000
Is there a way to kill all user connections to a database using T-SQL?
Thanks!
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Jul 29, 1999
We have a production server that is configured to 100 user connections.
Without any reason, the maximum connections had been exceeded and users
can no longer access the sql. But if you sp_who , it displayed only
4 user connections. Since, I have an open connection before this error
happens, i was able to execute sp_who. This happened 4 times since we
installed the sql server. the version is 6.50.422 sp5a with hotfix.
To all gurus out there, can you give light into this problem?
Thanks in advance.
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Nov 29, 2000
To increase user connections in SQL 6.5 do I have to first increase the memory configuration numbers?
Current memory config is at 8192.
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Apr 26, 1999
I did something stupid. I was having a problem with my application of trusted connections exceeding 15. I changed the user connections to 30 without uping the server memory configuration. Now I am out of memory and can't establish a connection with the server to up the memory configuration. I don't want to have to reinstall sql 6.5 and loose my existing data. I am on a Netfinity server with 512 megs of memory. Any suggestions? And of course our NT tape backup unit is not set up for sql backup.
Also does 30 connections and 128 megs of sql memory sound ok for a non dedicated server. About 25 users connecting to the database at any given time?
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Jun 6, 2001
We are having a problem with the maximum number of user connections to sql. Currently we have a max of 500 connections and we are unable to connect to sql because the max number has been exceeded. The sql logs are flooded with repeated error messages about the user conncetions being maxed out.
Anyone has an idea why this could be happening? Also, can it be fixed by rebooting the server?
Thanks
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Jul 23, 2005
Newbie here.I've got my database set up in SQL 2000, and have started an Access adpfor a front end. I have 10 licenses, and at the moment the onlyaccesses are the server through Remote Desktop and one person into theADP. I started getting ODBC timeout errors when running a complexquery, so I started poking around. In the logs there's messages sayingthe maximum of 10 user connections has been reached, over and overagain. I'm not even certain that these problems are related, but itdoesn't look good.Why are all 10 connections used when there's only the server and oneclient? No one else has access to this server. And how can I stop theODBC timeout? That paticular complex query is the whole jsutificationfor using SQL over Access, so I kind of need it to work. :)Thanks in advance, maddman
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Oct 12, 2007
So after 7 months of using SQL Express DB(on a dedicated server), sql management studio on two pc in my office to connect to said DB, and also connecting to DB with query analizer with no connection problems at all, I came into the office yesturday morning to find that the two computers with Studio could not connect to the DB?!?!?! Now, query analizer connects fine to the DB still, with the exact same ip/server instance and with windows authentication??? ive tried reloading studio, disabling firewall both on the client pc and on the server... the instance on the server is set to accept incoming connections (verified i guess by the fact that query analyzer can still connect to it)... i dont get it??? any suggestions????
~ Mauricio
Here is the error message from studio
TITLE: Connect to Server
------------------------------
Cannot connect to 74.***.***.**sqlexpress.
------------------------------
ADDITIONAL INFORMATION:
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) (Microsoft SQL Server, Error: -1)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=-1&LinkId=20476
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Aug 9, 2000
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.
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Oct 28, 1999
Hello ,
I get this message in the error log file (ODS17809) for sqlserver 6.5 on windows NT 4.0
Although this parameter is set to 50 which is more than enought for our environment. When I look up in current activity, I see only 4 users connected.
IS there a way to find , why this message comes up and how many actula connections (alive or hanging) are with the Sql server.
Well, I can increase the number of connections, but that is not the solution , as I would like to track/debug where all the connections are being used up.
thanks in advance for your help/suggestions
Mitesh Shah
mshah@princetonsoftech.com
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Aug 23, 2006
I am running a simple merge replication in SQL Server 2000. I have one database that is the publisher, and a second database that is the subscriber. When I add a new row to the subscriber it will replicate to the publisher as expected. However, the new row at the subscriber will then be deleted without explanation. The row will remain at the publisher though.
Does anyone know why it is doing this?
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Jul 27, 2001
Hi,
Environment:
I have a Sqlserver 6.5 production server used for web based applications
Compaq 5500 4 GIG RAM, 4 processor
Sql Memory config on that server is 1048576 (which is 2048 MB)
and the run value is 640000 (which is 1250 MB).
runvalue for user connections was 500
We have only 90 user connections may increase upto 100 depends on the connections. We don't have any overload on that server.
Error: I was seeing
"unable to connect maximum no. of 500 configured user connections are already connected" in the error log.
Action Taken:
I increased the user connections to 600
and rebooted the server. Immediately the same error I can see in the error log. But we have only 20 user connections at that time. I can able to connect.
Please advise me to get rid of this error.
Thanks,
Anu.
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Nov 2, 2006
I'm using the Data Flow Task to load data from a flat file into a SQL table and I'm missing rows. And there doesn't see to be any consistent or obvious reason why.
When I use the Bulk Insert Task I import the correct number of rows from the flat file. But when I use the Data Flow task and use a Flat File Source connected to a OLE DB Destination I get about 1/3 the right number of rows. So looking at these loaded tables at the same time I notice that the Data Flow Task method just skips rows sometimes.
Why does this happen??
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Mar 17, 2008
I have been reading through the article pointed to by the link below on msdn and its documented that one functional limitation of user instances is "Only local connections are allowed." I didn't understand the technical details(meaning) of that limitation and hopefully some one might explain it to me so that i can understand it better.
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Mar 27, 2000
Hello:
I am working with an application unde mssql 6.5 ,sp4. We have a separate
database for reporting on a different box. Each night we load a backup into
the database from the production database.
I set up a stored procedure to kill all users connected to this reporting
database just before the load.
THe job looks like this under scheduled tasks as a cmdexec:
isql -U sa -P -d master -Q"exec killusersall_sp 7" -o
F:MSSQLatchjobs
evdb.log
This job died with the following message:
Process Exit Code 1. ...[-b On error batch abort] [-O use Old ISQL
behavior disables the following]<EOF> batch processingAuto console width
scalingWide messagesdefault errorlevel is -1 vs 1 [-? show syntax summary
(this screen)]
The killusersall is paramaterize sp that I pass the dbid of the database
for whom I want all users killed. I need to put the stored procedure in the
master because I egt the spid from sysprocesses.
I do not understand why the job died. Does it matter if I named the stored
procedure as sp_killusersall instead of killusersall_sp which I used.
Can any one advise me about how to get the job to run? Any assistance will
be greatly appreciated. Thanks you.
David Spaisman
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Jul 30, 1998
Hi everyone!
Is it possible to control the number of simultaneous connections one login id can have?
I`d like to avoid my users to share their login ids and passwords to help them enter data into the system.
Thanks,
Mauricio
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Apr 25, 2006
I can't find the answer...it just talk about the CPU / ram /database limit. thanks for you help!
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Jun 26, 2015
How does one enable sql connections limits for user connections per new and existing databases? how to do it on whole server per database but not set a limit per user.Looks like this must be run on each databases but what if you have 100s of databases:
USE AdventureWorks2012 ;
GO
EXEC sp_configure 'show advanced options', 1;
GO
RECONFIGURE ;
GO
EXEC sp_configure 'user connections', 325 ;
GO
RECONFIGURE;
GO
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Nov 1, 2000
What are the maximum number of user connections achievable for sql server 2000 (w/ win 2000 adv server), and how are they managed - compared with sql server 7.0 (w/ win nt 4.0)? Our group is looking at upgrading our dbase server from sql server 7.0 to sql server 2000.
HELP
Thanks in advance
Gunnar
gunnardl@yahoo.com
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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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