Waiting On ASYNC_NETWORK_IO
Feb 20, 2008
We are having a problem with an SSIS package. The package gets stuck when it runs a data flow component that reads data from 5 large tables, performs a union on the data, does a conversion on one field and then writes the data to another table. This all happens in the same database and the ssis package runs on the same server as the database.
When I look at the waiting tasks on the sql server I always see the following type of scenario. It is always the ASYNC_NETWORK_IO that is causing the others to wait.
SPID
Wait type
duration
Waiting Address
Blocking Address
118
ASYNC_NETWORK_IO
47
0x0000000000C2FD68
NULL
118
CXPACKET
47
0x0000000000C2F2E8
0x0000000000C2FD68
118
CXPACKET
47
0x0000000000EB4DA8
0x0000000000C2FD68
118
CXPACKET
47
0x0000000000ECB048
0x0000000000C2FD68
118
CXPACKET
47
0x0000000000EE12E8
0x0000000000C2FD68
In some cases the duration column goes up to several hours until we finally just kill the package. At the same time, we also see that session 118 is consuming very large amounts of memory (in sys.dm_exec_query_memory_grants). However, when we look at the dtexec process that is running the package on the server it only has a working set of about 100Mb. We've tried rewriting the dataflow task as a simple stored procedure and this goes through smoothly.
Can anyone shed some light on what is going on and how to avoid this type of locking situation (other than just using plain old T-SQL).
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Oct 5, 2006
I am running a Stored procedure which select from a table and returns approx 800000 records. When calling from any client machine it takes long time to return the result (90 sec). It waits for ASYNC_NETWORK_IO which is pushing the result to client. If select statement is used with TOP operator to return less number of records it executes faster. When calling from the server the stored proc returns data in 13 sec with all records. In another machine of identical HW and configuration this problem is not there. Can anyone help how to improve ASYNC_NETWORK_IO issue?
SQL-2005 SP1 64 bit Standard on Active/Passive cluster
Windows -2003 Ent.
Thanks
-Ashis
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Jun 8, 2006
I have re-initialize some subscription. After generated snapshot successfully, the synchronization view showing 'The process is running and is waiting for a response from the server.' and I found the replication process is under 'async_network_io wait'. The job has run for more than 8 hrs. Any idea to improve it? Thanks in advaise.
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Oct 5, 2006
I am running a Stored procedure which select from a table and returns approx 800000 records. When calling from any client machine it takes long time to return the result (90 sec). It waits for ASYNC_NETWORK_IO which is pushing the result to client. If select statement is used with TOP operator to return less number of records it executes faster. When calling from the server the stored proc returns data in 13 sec with all records. In another machine of identical HW and configuration this problem is not there. Can anyone help how to improve ASYNC_NETWORK_IO issue?
Environment
SQL-2005 SP1 64 bit Standard on Active/Passive cluster
Windows -2003 Ent.
Thanks
-Ashis
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Mar 28, 2007
Recently we observed a problem. We are running stored procedure through our c# code. Three machines access the server and update or insert in the required tables in the server. If there is no data in the server, on installing first time our application usually our database is clean. then stored procedure works fine, it takes around 10 to 15 sec to execute. Next time if execute the time goes up to minutes like 15 mins. Next time it goes for hours around 4 hrs. Even to update 4 or 5 records it takes time. Initially we thought it was because of the size of the data and we tried to re tune on indexes, it did not solve. But now what we observe is even with less number of records in server also it wouldn't come of the execution for hours.
Now are executing the just the SP in the SQL manager studio to see the time. That one also is executing for hours. when looked at the activity monitor the process goes to suspend state with wait type ASYNC_NETWORK_IO.
When we comment one of the query is working fine.
Is this something to do with the query I am not sure. If that is the case it should not work every time.
The query makes any sence or is there any way to write it in better way
'UPDATE [server].[dbo].[DocumentMetadata] SET DocumentInfoID = b.DocumentInfoID, [Name] = b.[Name], MetadataType = b.MetadataType,
[Value] = b.[Value], ValueType = b.ValueType
FROM [server].[dbo].[DocumentMetadata] a WITH (UPDLOCK)
INNER JOIN (SELECT c.DocumentInfoID, c.[Name], c.MetadataType, c.[Value], c.ValueType
FROM MACHINENAME.[Client].[dbo].[DocumentMetadata] c
INNER JOIN MACHINENAME.[Client].dbo.DocumentInfo DINF ON c.DocumentInfoID = DINF.DocumentInfoID
INNER JOIN MACHINENAME.[Client].dbo.Path d on DINF.NativeFileID = d.PathID
INNER JOIN MACHINENAME.[Client].dbo.ActiveDataSource ADS ON d.DataSourceID = ADS.DataSourceID
WHERE ADS.ProjectID = ''' + @ProjID + ''') b
ON a.DocumentInfoID = b.DocumentInfoID AND a.[Name] = b.[Name]'
'INSERT INTO [server].[dbo].[DocumentMetadata]
(DocumentInfoID, [Name], MetadataType, [Value], ValueType)
SELECT c.DocumentInfoID, c.[Name], c.MetadataType, c.[Value], c.ValueType
FROM MACHINENAME.[Client].[dbo].[DocumentMetadata] c
INNER JOIN MACHINENAME.[Client].dbo.DocumentInfo DINF ON c.DocumentInfoID = DINF.DocumentInfoID
INNER JOIN MACHINENAME.[Client].dbo.Path d on DINF.NativeFileID = d.PathID
INNER JOIN MYCLI.[Client].dbo.ActiveDataSource ADS ON d.DataSourceID = ADS.DataSourceID
WHERE ADS.ProjectID = ''' + @ProjID + '''
AND Ltrim(rtrim(c.DocumentInfoID))+ ltrim(rtrim(c.[Name])) NOT IN
(SELECT Ltrim(rtrim(DocumentInfoID))+ ltrim(rtrim([Name])) FROM [server].[dbo].[DocumentMetadata])'
We have been fighting it out for so many days.
Can anybody help
Thanks
knvdssr
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Jun 20, 2001
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Has anyone run across this before? If so, did you ever figure out how to fix it?
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May 7, 2008
I have a Stored Procedure which Ideally should run when a Customer Logs in, the Procedure will check the available stock and create a Temp Table for the Information, which allows many other Queries in the site to run a lot faster, (due to no joins). The Query has taken as much as 30seconds (Lots of Records and 1/2 dozen Joins) to run upon log in and causing a Timeout for the web application.
I want the procedure to run as it is, but for the login method to not be dependent on the Process tried this in .NET cmd.BeginExecuteNonQuery() (cmd=SQLCOmmand)
which doesn't do what I want it just allows me to run heaps of QUeries at the same time.
Can anyone help me with getting this procedure to run and not hold up the Web application? Not sure whether I need to do this in .NET, or whether I can get .NET to run a Batch File or something, but someone must have had a similiar problem, please help.
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Jul 20, 2005
Does anybody know what might cause the following message to show up inthe SQL Server Error Log?:Time out occurred while waiting for buffer latch type 2, bp0x12260f80, page (5:77914), stat 0x40d, object ID 7:421576540:0,waittime 500. Continuing to wait.I've read several articles about what to do about this situation onSQL Server 2000, but I'm running SQL Server 7.0. Specifically, I'mrunning version 7.00.842. Is there a way to resolve this problemwithout upgrading to some flavor of SQL Server 2000?
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Aug 23, 2004
Hi Guys,
One of your SQLSERVER 7, Server throws the below error message into the log file. It won't go away until the server get rebooted. When this error start showing up.. customers have hard time connecting to the Server, eventually we have to reboot the server.
Time out occurred while waiting for buffer latch type 1, bp 0x18b9200, page (1:50859), stat 0xb, object ID 17:1954106002:1, waittime 500. Continuing to wait.
Any help is greatly appericated.
thanks
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Jun 17, 2004
Is anyone have already encountered such a problem :
When a table is locked by several locks (key, pag), either a SELECT request which does not need to lock any row cannot succeed.
In SQL Server Enterprise Manager, I see that my request is waiting for a lock "LCK_M_S" !!!
How I can avoid this kind of situation which seems to me completely abnormal.
I have never been faced with this kind of problem in Oracle.
Thanks for anyone who will help me to resolve this "bug".
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Apr 6, 2015
I'm wondering if there is any way for me to execute any type of command (delete, insert, create, alter, etc) on management studio without having to wait the server answer.
On Oracle, I use DBMS_JOB. On SQL Server, do I have to create a SQL SERVER Agent Job? What if I don't have permission to create that kind of jobs?
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Feb 6, 2007
I am attempting to modify the ADS sample to work with my own application and am running into a snag. I have a simple sqlce database that has two tables in it. I have everything working up until the point where I try to "Pull" the data. At this point in time this is what happens.
1.) I successfully Drop Table1 from the SQLCE database and then Pull "Table1" from the desktop database
2.) When attempting to Pull Table2. It runs the DoesTableExist Function, identifies that the table does exist and therefore tries to run the "DropTable" routine before Pulling the desktop Table2 data. As soon as the sqlCmd.ExecuteNonQuery of the DropTable routine runs I get the following error....
"The system timed out waiting for a lock. [ Session id = 1,Thread id = 1318094114,Process id = 1318068802,Table name = Table2,Conflict type = x lock (s blocks),Resource = DDL ][Table2]"
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Jan 28, 2008
Hi!
I hope to get some help with a stored procedure that never stops executing when run from Reporting Services development environment.
The server: SQL Server 2005 SP2 x86, 2 gig ram, 2 processor cores.
The stored procedure I execute is simple, it declares and sets some variables and then a executes a select statement
with 6 joins.
If I execute the stored procedure from Management Studio the query runs and returns about 50 000 rows in ~2 seconds. No problems!
The problems arises when I execute the stored procedure from visual studio (testing my reporting services report). The query will never complete its execution!?
I checked the activity monitor and can verify I have NO processses with any information in the blocked by or blocking column.
The strange thing is I got 3 rows for process id 64, only one row (row 1) printing the executing user.
Row 1: Stutus suspenden, Wait Type CXPACKET
Row 2 and 3 are pending between runnable and suspended and wait typoe pageiolatch_ex and no wait type at all when I refresh. These are probably parallell threads executed in the query.
The strange thing here is that this process never completes and if I do a trace the last command executed is select statement. I don´t understand what the problem is, sql server bug? Parellelism problem (in this case, why?)
Any help is appreciated
Regards
Per
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My Excel Pivot Table connects to and SSAS 2008 cube. What exactly happens in the back-end during 'Waiting for the query to be executed...'
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hi!
I wonder if anyone can tell me how we can run select queries in an OLE DB data flow task and tell the target SQL 2000 server it should allow reads at all time. Currently when a lock is on the source table our SSIS package will sit and wait untill the lock on the source table is gone.
Thanks.
Marc
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May 22, 2007
I am relatively new to SQL Server so excuse my ignorance.
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Frequently, when I'm connecting to my server through SSMS i get "Is Busy: Microsoft SQL Server is waiting to complete an internal operation...."
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vs2005 help���� a textbox ，a button ， a sqldatasource ,a dataview when click the button execute sql: select * from authors where name=''+textbox.text+''
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contral sqldatasource,
code is holpful 2!
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Oct 3, 2000
Hi all,
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ERROR NUMBER : 8645
A time out occurred while waiting for memory resources to execute the query. Rerun the query.
Can anyone suggest me how i have to resolve the above error, because i was facing this error very often. Pls suggest me a permanent solution.
Thanks!
--Kavira
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------------
Ray Miao at 6/5/2002 8:13:38 AM
Double check with sql service manager. Did you change sa pwd?
------------
Shaji at 6/5/2002 4:36:16 AM
Hi ,
Whenever I restart the Server , SQL server service is starting properly, but the agent is showing the green sign in EM ,agent Log also its showing its started. But in EM the jobs are not showing the next run time its showing ( Date and time not available). When I double click the jobs its showing the following error message
Micorsoft SQL - DMO ( ODBC Sql state 42000)
Error 14258 : can not perform this operation while SQL server agent is starting)
FYI :This server contain the databases of SMS too .
Thank you ,
Shaji
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Sep 22, 2006
We are useing merge replication with MSSQL Server 2000 for our two location, we have more than 6 database in replication on has issue following error and few time not updated data due to this error -
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Feb 21, 2007
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Mar 31, 2015
I am getting below error while executing any SQL query on database server.
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May 28, 2007
Hi,
I have a problem with the task "event watcher".
I've made a query like the one in msdn (SELECT * FROM __InstanceCreationEvent WITHIN 10 WHERE Targetinstance ISA "CIM_DirectoryContainsFile" and TargetInstance.GroupComponent= "Win32_Directory.Name="e:\\temp""). I have 20 similar tasks for watching in different folders, but when there are too much tasks in parallel, it doesn't work anymore. I change the numbers of executables to 128 (in the general properties of the package (to test)) but it doesn't seems to work.
I don't understand why it works when there are only 1 or 2 (6 seems to be the maximum) tasks and not if there are more than 6.
Could you help me with this issue?
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Thanks a lot.
Julien.
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