Wait Type: NETWORKIO

Jan 14, 2005

I have an ASP.NET web application that hangs on a single database UPDATE command for 5+ minutes. I can see this occur in SQL Profiler. This is a one row UPDATE statement on a small table (~600 rows). There are no JOINs or sub queries. There are no other users using the system. During this 5+ minutes, I can see the job in Enterprise Manager with a wait type of NETWORKIO. Since both IIS And SQL Server are running on the same system, the network shouldn't be an issue. Any ideas?

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NETWORKIO - Wait Type

Sep 29, 2006

Hello, my first post??

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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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This is the scenario in my environment

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WRITELOG920039.89887485.89 32554.00 23446032975.02

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In my workflow I will be waiting for the CRV.DONE indicator file and once it is avaiable I will start loading the CRV.data and once the load is completed I will delete CRV.DONE file and be ready for the next day load.

Please let me know if there is any way in SQL Server 2005 to achieve it.Thanks

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Hi. We are migrating a mainframe datacom database to SQL Server. One of our client-server applications already uses SQL Server. This application uses a middleware product to query and update the datacom database being migrated. We are considering using Service Broker to replace the middleware.

In many cases the client does not need a response provided the message is queued and will eventually get delivered. However, in some cases the client would like to wait for the message to be processed before proceeding. Is there an easy way to both submit and optionally wait for a response - with data - in a single stored procedure? If client does not want to continue to wait, is there a way to use a procedure to check for the returned message later?

We have not used Service Broker before and are doing for a "sanity" check before proceeding. We do not want to tightly couple the two databases at this time.

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I have installed performance dashboard on 2 different servers. The first server have User Session CPU Time 71% and Wait Time =28%, The other server have Cpu Time of 20% and Wait Time of 79%. Have I understand that stands in SQL Server Waits And Queues that I have some typ of wait problem in my second server?


Then I tries to run this
Select

'%signal waits' = cast(100.0 * sum(signal_wait_time_ms) / sum (wait_time_ms) as numeric(20,2)),
'%resource waits'= cast(100.0 * sum(wait_time_ms - signal_wait_time_ms) / sum (wait_time_ms) as numeric(20,2))
From sys.dm_os_wait_stats


First Server
%signal waits %resource waits
--------------------------------------- ----------------------------
0.07 99.93
Second Server
%signal waits %resource waits
--------------------------------------- ----------------------------
0.12 99.88

Messy in my head€¦ Help please

My second server have

CLR with 50% in the historial wait. Rest in Sleep

My first server have
99% in sleep wait category.




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Sep 30, 2004

I'm doing an update on a table with about 113m rows, the update-statement is fairly simple: update tab set col = null where col is not null.
The col column is mostly null.

Sysprocesses shows three rows for this statement: 1 CXPACKET (its a dual processor, 2000 box with sp3 installed), 2 PAGEIOLATCH_SH (waitresource is filled). My guess would be that the where-clause is executed in a seperate process blocking the update.

I changed the statement into update [...] set col = null; sysprocesses shows one row with PAGEIOLATCH_SH. Executing forever.

I checked other processes including those outside sqlserver but none are using the db, let alone accessing the table involved. Even restarted sqlserver to be sure there's no dead process blocking the update. Didn't help.

So I added a search condition to the where-clause, involving a clustered index in order to reduce the rowcount. The execution plan shows a 97% hit on the clustered index, but sysprocesses shows the three rows again...

So far the profiler didn't help me out either: there's a SP: CacheInsert on the update-statement... then nothing.

What should I do?

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TIA
Luigi

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I also have a Buffer cache hit ratio of 2848.00.

These numbers are when there is NOBODY on the DB at all It is just sitting there. When I reboot the server, as soon as SQL starts it starts to send the emails again.

Server: Intel Xeon Quad Core 2.66
RAM: 4GB (with /3GB in the boot.ini)
RAID 1: OS
RAID 1: Data (DB and logs)
CPU Utilization: 0-1%
RAM Utilization: 527MB
OS: Server 2003 R2 With SP2
SQL: 2005 Standard with SP2

How can I determine if the ALWT is really 3916?

I executed 'Select * from sysprocesses where SPID>50 and waittime>0'

Which showed;

BROKER_RECEIVE_WAITFOR
waittime=110640ms
waittype=0x0075
status=suspended
program_name=DatabaseMail90 - Id<3780>

Any assistance is greatly appreciated.


Thank You

Magnum

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Thanks

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Good morning,

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Thanks in advance,
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Info:
SQL 2005
Microsoft SQL Server Integration Services Designer
Version 9.00.3042.00

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[SSIS Team Followup]

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Here is what I have:

I have a table storing imaged documents and has become very large. I want to move the table to another filegroup. The table is created like this:

USE [PD51_Data]
GO
/****** Object: Table [dbo].[SCANNEDDOCUMENTS] Script Date: 05/13/2008 14:52:40 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
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(
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)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

GO
SET ANSI_PADDING OFF
GO
ALTER TABLE [dbo].[SCANNEDDOCUMENTS] WITH NOCHECK ADD CONSTRAINT [ISCANNEDDOCUMENTS2] FOREIGN KEY([TopicID])
REFERENCES [dbo].[TOPICS] ([TopicID])
GO
ALTER TABLE [dbo].[SCANNEDDOCUMENTS] CHECK CONSTRAINT [ISCANNEDDOCUMENTS2]

On a test DB, I moved the clustered and nonclustered indexes to a secondary filegroup no problem, but it still shows to be stored in the primary filegroup. I read an article about having to create a new table in the secondary in order to move the images and text file group. Has anyone come across this?

Do I need to drop the clustered index and FK to move to a secondary filegroup?

Or

Do I create a new table into the secondary filegroup and then add the Clustered index and constraints?

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