Update Takes Long Time To Complete!?
Jul 20, 2005
Hi There,
I have an update statement to update a field of a table (~15,000,000
records). It took me around 3 hours to finish 2 weeks ago. After that
no one touched the server and no configuration changed. Until
yesterday, I re-ran it again and it took me more than 18hrs and still
not yet finished!!!
What's wrong with it? I can ran it successfully before. I have tried
two times but the result was still the same.
My SQL statement is:
update [all_sales] a
set a.accounting_month = b.accounting_month
from date_map b
where a.sales_date >= b.start_date and a.sales_date < b.end_date;
An index on [all_sales].sales_date is built successfully.
A composite index on ([date_map].start_date, [date_map].end_date) is
built successfully.
My server config is:
SQL Server 2000 with Service Pack 3
Windows 2000 with Service Pack 4
DELL PowerEdge 6650 Server
DUAL XEON 1900MHz Processors
2G RAM
2G Page File on Drive C
2G Page File on Drive D
DELL Diagnostics on all SCSI harddisks were all PASSED.
Any experts could simly give me a help????
Thanks x 1,000,000,000
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Dec 15, 2006
I am using VS2005 (VB) to develop a PPC WM5.0 Program. And I am using SQLCE 3.0. My PPC Hardware is in 400MHz.
The question is when the program try to insert the first record into sdf database after each time the program started. It takes a long time. Does anyone know why and how can I fix it?
I will load the whole database into a dataset when the program start and do all the "Insert", "Update", "Delete" in this dataset and fill it into database after each action.
cn.Open()
sda = New SqlCeDataAdapter(SQL, cn) 'SQL = Select * From Table
scb = New SqlCeCommandBuilder(sda)
sda.Update(dataset)
cn.Close()
I check the sda.update(), it takes about 0.08s for filling one record into database normally. But:
1. Start the PPC Program
2. Load DB into dataset
3. Create a ONE new record in dataset
4. Fill back to DB
When I take this four steps everytime, the filling time is almost 1s or even more!
Actually, 0.08s is just a normal case. Sometimes, it still takes over 1s to filling back a dataset which only inserted one record when the program is running. (Even all inserted records are exactly the same in data jsut different in the integer key)
However, when I give up the dataset and using the following code:
cn.Open()
Dim cmd As New SqlCeCommand(SQL, cn) ' I have build the insert SQL before (Insert Into Table values(XXXXXXXXXXXXXXX All field)
cmd.CommandType = CommandType.Text
cmd.ExecuteNonQuery()
cn.Close()
StartTime = Environment.TickCount
I found that it is still the same that the first inserted record takes more time, but just about 0.2s. And the normal insert time is around 0.02s. It is 4 times faster!!!
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Nov 22, 2007
Hi all,
I have a stored procedure that is called from a VB.NET application that takes an enormously long time to execute. In the QA it only takes 10sec but in the application it takes ages. The stored procedure is as follows:
PROCEDURE NAME IS SPTOPTWENTYUSERS
SELECT TOP 20 STRUSERNAME,SUM(INTBYTESRECVD) AS INTDOWNLOAD FROM TBLISAWEBLOGS
WHERE DTELOGDATE BETWEEN @BEGINDATE AND @ENDDATE
GROUP BY STRUSERNAME
ORDER BY INTDOWNLOAD DESC
The code that runs it is as follows:
sSQLString = SPTOPTWENTYUSERS
Using cnn As New SqlConnection(GetPath)
Try
Dim cmd As New SqlCommand(sSQLString, cnn)
Dim dr As SqlDataReader
With cmd
.CommandType = CommandType.StoredProcedure
.CommandTimeout = 0
.Parameters.Add("@BEGINDATE", SqlDbType.DateTime)
.Parameters.Add("@ENDDATE", SqlDbType.DateTime)
.Parameters("@BEGINDATE").Value = dtpStartDate.Value
.Parameters("@ENDDATE").Value = dtpEndDate.Value
End With
cnn.Open()
dr = cmd.ExecuteReader
Any help on why this happens would be much appreciated.
thanks
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Mar 21, 2008
Hi,I've a strange problem with a INSERT query. It's taking a long time toexecute. The format is like this :INSERT INTO table1SELECT ..FROM table2Executing the SELECT .. FROM table2 is taking 30 seconds. The resultis nothing: no records are selected.When i include the INSERT part it will take 12 hours to completeINSERT INTO table1SELECT ..FROM table2There's is an index on the table and when i delete it, it gives stillthe problem.Keh?Greetz,Hennie
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Apr 7, 2008
Hi,
It seems inserting records takes a relatively long time. My guess is it needs time to allocate disk space for the extra space needed. Assuming this is true, are there any DB settings that allow auto space allocation in bigger chunk? I am looking for something like "DB growth factor" or " Table growth factor"
Thanks for any info.
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Nov 9, 2007
Dear friends,
Our package which at the time of normal execution takes 2-2:30 mins for fetching data on VPN with some select queries. But some times its job runs for hours and hours. What could be the exact reason behind it? I guess its queries are stuch somewhere, but not when we run from the BIDS or run the job manually.
Please help. Thanks.
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Jul 20, 2005
HiI have have two linked SQL Servers and I am trying to get remote writesworking correctly (fast).I have configured the DB link on both machines to:Point at each others DB.I have security set up to map each others server loginsand Server Options: Collation Compatible, Data Access, RPC, RPC Out, UseRemote Collation all checkedMy problem is that when a SP performsBegin TransactionUpdate Local TableUpdate Remote TableCommit TranIt takes several seconds to complete. (about 7 seconds not acceptable tous)This is due to the remote update - how can I improve the response time?example of a stored procedures that takes timewhere ACSMSM is a remote (linked) SQL Server.procedure [psm].ams_Update_VFE@strResult varchar(8) = 'Failure' output,@strErrorDesc varchar(512) = 'SP Not Executed' output,@strVFEID varchar(16),@strDescription varchar(64),@strVFEVirtualRoot varchar(255),@strVFEPhysicalRoot varchar(255),@strAuditPath varchar(255),@strDefaultBranding varchar(16),@strIPAddress varchar(23)asdeclare @strStep varchar(32)declare @trancount intSet XACT_ABORT ONset @trancount = @@trancountset @strStep = 'Start of Stored Proc'if (@trancount = 0)BEGIN TRANSACTION mytranelsesave tran mytran/* start insert sp code here */set @strStep = 'Write VFE to MSM'updateACSMSM.msmprim.msm.VFECONFIGsetDESCRIPTION = @strDescription,VFEVIRTUALROOT = @strVFEVirtualRoot,VFEPHYSICALROOT = @strVFEPhysicalRoot,AUDITPATH = @strAuditPath,DEFAULTBRANDING = @strDefaultBranding,IPADDRESS = @strIPAddresswhereVFEID = @strVFEID;set @strStep = 'Write VFE to PSM'updateACSPSM.psmprim.psm.VFECONFIGsetDESCRIPTION = @strDescription,VFEVIRTUALROOT = @strVFEVirtualRoot,VFEPHYSICALROOT = @strVFEPhysicalRoot,AUDITPATH = @strAuditPath,DEFAULTBRANDING = @strDefaultBranding,IPADDRESS = @strIPAddresswhereVFEID = @strVFEID/* end insert sp code here */if (@@error <> 0)beginrollback tran mytranset @strResult = 'Failure'set @strErrorDesc = 'Fail @ Step :' + @strStep + ' Error : ' + @@Errorreturn -1969endelsebeginset @strResult = 'Success'set @strErrorDesc = ''end-- commit tran if we started itif (@trancount = 0)commit tranreturn 0
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Nov 14, 2007
Hi,
Its a common issue with reporting services, exporting a report with huge data to excel takes long time to render. Im facing the same issue. Trying to export a SSRS 2005 report to Excel 2003 takes very long time.
Problem 1:
The time taken to generate the excel report is pretty long (about 10 minutes) as the report runs to hundreds of pages. (The excel has about 30,000 rows and is ~15 MB)
Problem 2:
Once I open the excel and close it the size reduces to half of it. This is understood because of lot of characters values in the report that can be represented as single byte string, that€™s probably where Excel is making a difference. In Reporting Services it always write strings as 2-byte Unicode, but Excel will always try to compress to single byte when possible.
Am majorly concerned about the Problem 1. Any solutions would be highly appreciated. Thanks in advance.
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Jan 19, 2007
I have a report which is fairly simple but takes a very long time..
It involves the incidents being counted by categories hence it has several Union All.
Also the report numbers are generetd through 2 tables hence within every Union All tehre is a left or an Inner join.
sample code:
SELECT
1 Sort_Order,
COUNT(*) AS Call_Count,
'Incident Resolved at Level 1' AS Count_Type
FROM HOUAPPS237.CallsAndIncidents.dbo.PROBSUMMARYM1 T1
INNER JOIN HOUAPPS237.CallsAndIncidents.dbo.PROBSUMMARYM2 T2
ON T1.NUMBERPRGN = T2.NUMBERPRGN
WHERE PROBLEM_STATUS = 'closed'
AND T2.THIRD_ASSIGNEE IS NULL
AND T2.THIRD_ASSIGNMENT IS NULL
AND T1.SECONDARY_ASSIGNEE IS NULL
AND HAL_FIRST_RES='t'
AND DATEPART(mm, DATEADD(hour, -@offset, CAST(T1.OPEN_TIME AS DATETIME))) = @MONTH
AND DATEPART(yy, DATEADD(hour, -@offset, CAST(T1.OPEN_TIME AS DATETIME))) = @YEAR
AND T1.OTI_ORIGINATOR IN (SELECT Userid FROM HOUAPPS286.HALServiceDesk.dbo.ServiceCenterAgents)
UNION ALL
-- Calls RESOLVED BY L2
SELECT
2 Sort_Order,
COUNT(*) AS Call_Count,
'Incidents Resolved at Level 2 or 3' AS Count_Type
FROM HOUAPPS237.CallsAndIncidents.dbo.PROBSUMMARYM1 T1
LEFT JOIN HOUAPPS237.CallsAndIncidents.dbo.PROBSUMMARYM2 T2
ON T1.NUMBERPRGN = T2.NUMBERPRGN
WHERE (HAL_FIRST_RES<>'t' OR HAL_FIRST_RES IS NULL)
AND PROBLEM_STATUS = 'closed'
AND DATEPART(mm, DATEADD(hour, -@offset, CAST(T1.OPEN_TIME AS DATETIME))) = @MONTH
AND DATEPART(yy, DATEADD(hour, -@offset, CAST(T1.OPEN_TIME AS DATETIME))) = @YEAR
AND T1.OTI_ORIGINATOR IN (SELECT Userid FROM HOUAPPS286.HALServiceDesk.dbo.ServiceCenterAgents)
UNION ALL
could you suggest what might be the reason why teh report churns for so long.
thanks,
kiran.
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Jul 25, 2006
I have a vb.net application using report services that has a big delay when I set the parameters with which to call the report.
I create a new reporting.reportviewer.
I set the ReportServerCredentials.NetworkCredentials, ReportServerUrl, ProcessingModem, ReportPath and everything is fine.
When I call SetParameters with a very simple parameter set, I get a delay of between 0.5 and 2.5 seconds. That delay is very noticible to the users. Below is an extract of a sql profiler trace to a database showing the start time, end time, event class and data text of the sql. I've marked the area with the delay in red.
I have no idea what is happening at that time, but Is there anything I can do to get rid of that delay?
It seems that it could be the first time the my application has had to interface with reporting services.
21/07/2006 13:29:48 363 21/07/2006 13:29:48 363 10 exec ReadChunkPortion @ChunkPointer=0xFDFF126D000000006804000001000400,@IsPermanentSnapshot=1,@DataIndex=4148,@Length=8
21/07/2006 13:29:48 363 21/07/2006 13:29:48 363 10 exec ReadChunkPortion @ChunkPointer=0xFDFF126D000000006804000001000400,@IsPermanentSnapshot=1,@DataIndex=8,@Length=4100
21/07/2006 13:29:48 363 21/07/2006 13:29:48 363 10 exec sp_reset_connection
21/07/2006 13:29:48 363 21/07/2006 13:29:48 363 10 exec CreateSession @SessionID='5zz5gh2wgwfs2hf0qb0gh155',@ReportPath=N'/Symphony Reporting/report3',@Timeout=600,@AutoRefreshSeconds=0,@OwnerSid=0x010500000000000515000000F13F1E839A1DDABDC36D00302B060000,@OwnerName=N'MCR-SYSTEMS
hutchinson',@AuthType=1,@DataSourceInfo=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,@EffectiveParams=N'<Parameters>
<Parameter>
<Name>DataSource</Name>
<Type>Integer</Type>
<Nullable>False</Nullable>
<AllowBlank>False</AllowBlank>
<MultiValue>False</MultiValue>
<UsedInQuery>False</UsedInQuery>
<State>MissingValidValue</State>
<Prompt />
<PromptUser>True</PromptUser>
</Parameter>
<Parameter>
<Name>AuthLvl</Name>
<Type>Integer</Type>
<Nullable>False</Nullable>
<AllowBlank>False</AllowBlank>
<MultiValue>False</MultiValue>
<UsedInQuery>False</UsedInQuery>
<State>MissingValidValue</State>
<Prompt />
<PromptUser>True</PromptUser>
</Parameter>
<Parameter>
<Name>Home</Name>
<Type>Integer</Type>
<Nullable>False</Nullable>
<AllowBlank>False</AllowBlank>
<MultiValue>False</MultiValue>
<UsedInQuery>False</UsedInQuery>
<State>MissingValidValue</State>
<Prompt />
<PromptUser>True</PromptUser>
</Parameter>
<Parameter>
<Name>SiteFilter</Name>
<Type>Integer</Type>
<Nullable>False</Nullable>
<AllowBlank>False</AllowBlank>
<MultiValue>True</MultiValue>
<UsedInQuery>False</UsedInQuery>
<State>MissingValidValue</State>
<Prompt>Select Required Site(s)</Prompt>
<PromptUser>True</PromptUser>
</Parameter>
<Parameter>
<Name>DateFilter</Name>
<Type>DateTime</Type>
<Nullable>False</Nullable>
<AllowBlank>False</AllowBlank>
<MultiValue>True</MultiValue>
<UsedInQuery>False</UsedInQuery>
<State>MissingValidValue</State>
<Prompt>Select Required Date(s)</Prompt>
<PromptUser>True</PromptUser>
</Parameter>
</Parameters>'
21/07/2006 13:29:48 377 21/07/2006 13:29:48 377 10 exec sp_reset_connection
21/07/2006 13:29:48 377 21/07/2006 13:29:48 377 10 exec ObjectExists @Path=N'/Symphony Reporting/report3',@AuthType=1
21/07/2006 13:29:48 847 21/07/2006 13:29:48 847 10 exec sp_reset_connection
21/07/2006 13:29:48 847 21/07/2006 13:29:48 847 10 exec GetSessionData @SessionID='5zz5gh2wgwfs2hf0qb0gh155',@OwnerSid=0x010500000000000515000000F13F1E839A1DDABDC36D00302B060000,@OwnerName=N'MCR-SYSTEMS
hutchinson',@AuthType=1,@SnapshotTimeoutMinutes=1440
21/07/2006 13:29:48 847 21/07/2006 13:29:48 847 10 exec sp_reset_connection
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Oct 11, 2006
I have a table tblCustTrans which contains
custid int
transid int
startdate datetime
value int
the custid, transid and startid are composite primary key.
the table contains more than 10 million records. Now i want to fetch record for
select * from tblcusttrans where startdate > = 10/10/2006 10:00:000 and startdate <= 10/10/2006 11:00:000
This statement is taking more than 2 hours to fetch the data. is there a way to fetch the record with less time
Regards
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Dec 17, 2007
Hi All,
I'm trying to rebuild my master database for sql server 2000. The process of rebuilding stared fine. But it is almost 4 hours since it got started. Performing it on a test system. Got doubtful and started the same on another test system. Issue is same and it is almost 2 hours. The Db size is less than 100 MB in both cases. IS IT NORMAL? I've tried the same for SQL SERVER 2005 and it got finished in couple of minutes. Please advise.
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Dec 28, 2006
I broke up my cube into 24 partitions. There are about 630M total fact rows in that cube.
When I open the cube to browse in BIDS or SQL Management Studio it takes very long time to open (I think 30 minutes).
Profiler does not show that it's running a query, but messages like this keep appearing throughout the time it's opening to browse:
Progress Report Begin, 14- Query, Started reading data from the 'p0' partition.
Progress Report End, 14- Query, Finished reading data from the 'p0' partition.
Progress Report Begin, 14- Query, Started reading data from the 'p10' partition.
Progress Report End, 14- Query, Finished reading data from the 'p10' partition.
and goes on like that....
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May 26, 2008
Hi,
The scenario is the data comes from various sources and its staged into staging database. From this staging database it goes into data warehouse database. Everyday this staging database is truncated and repopulated from various sources.
I've a dimension table called DimCustomers which consists of around 300,000 rows and has lots of different types of SCD columns. It takes around 4-5 hours to load data from staging to this dimension table. Currently I'm using a For Loop container which uses a store proc to extract 15000 rows each time and populate my dimension tables. First couple of loops it goes off quickly but as and when the number reaches half of the count it slows down and hence it takes around 4-5 hours to load data.
What would be the best approach to populate this kind of dimension table.
Thanks
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Nov 16, 2007
Hi,
I have problem with JDBC 2005 (1.1) running against SQL 2005 Express edition (SP2). Sometimes, the statement takes long time (more than 10 seconds). Sometimes, the same statement takes just a few seconds. It is very unpredictable.
The query that we have problem is most of the time is join sql statement.
Does anyone see this problem?
Thanks,
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Oct 27, 2007
Hi all,
I have MS Time Seeries model using a database of over a thousand products each of which has hundreds of cases. It amazingly takes only a few minutes to finish processing the model, but when I click Mining Model Viewer to view the models, it takes many hours to show up. Once the window is open, I can choose model for different products almost instantly. Is this normal?
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Oct 19, 2006
Hi,
I was just wondering if anybody came across this behaviour where closing a Fast Forward Read only cursor takes abnormally long time to close. I am running SQL Server 2005 standard edition.
Thanks
Nand
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Mar 7, 2002
Hi,
I have a table with 48 million rows,when i executed following update query it is taking 10 HOURS in SQL SERVER 2000 with SP1.
Where as when i executed same query in SQL SERVER7.0 with same table then it is taking 13 MINUTES. Comming to Machine...SQL 2000 Server has more processors and greater memory than SQL 7.0 m/c.
It looks strange but this is true.Does any one faced such problem..is there any bug in SQL 2000?????
Here is Query::
update cus_pay_jan_dist set univ_regdate = b.dayid
from cus_pay_jan_dist a with (nolock), tm_dayids b with (nolock)
where a.univ_regdate = b.dayidnum and a.univ_regdate like '2001%'
Thanks
Ananth
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Mar 27, 2008
I have an update statment in my SSIS that use to take 10 minutes in SQL 2000 dts and now its take 1 hour 15 minutes in SQL 2005.
this is my sql update statment -
Update WeeklySalesHistory set
weekendingdate =
(SELECT LastTransDateTime from ReplicationControl
where TableName = 'WEEKHST')
where weekendingdate is null
It is using ole db connection. About 36,000 records that it is updating.
I have read ole db can be slow and to use staging table. Does that mean on all updates like this I have to use a staging table and then insert. I didn't use to have to do this in SQL 2000. Has it changed. Are there any other options?
any input greatly appreciated.
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Dec 16, 2004
The database is about 5 Gb and the transaction log is about 13 M
and it takes 11 hours to do a full back up.
I am not sure why it takes that long? Is there any thing I can check?
IT is SQL v7.
Thank you
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Dec 7, 2006
Hi,
How much time will it take to restore a DB 300MB long in SQL Server 2005 Express?
Full Restore with recovery option?
The thing is that I made a restore process and its been running for about an hour now.
When I open the Management Studio on the database folder it shows "Restoring..."
Is this normal?
Tnx
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Mar 19, 2007
Just curious if there's a reason why everytime I try to apply the Microsoft SQL Server 2005 Express Edition Service Pack 2 from Windows Update that it will sit at "Installing" and appear to do nothing (no hard drive activity, but the MSI and setup processes are chewing a little bit of CPU time). How long should I give this update to complete? I am running a 2-CPU dual-core Xeon 3.0GHz w/ 2GB of RAM setup, so I would have thought it would be completed very quickly. :(
Edit:
Disregard; I had to wait for a full 15 minutes! :O
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Jan 29, 2007
Recently my system encounter some problem when retrieving certain record from MSSQL.
For an example i have a database which contains 1.5 million of members. so i have a perl scripts that will execute to query based on certain range.
the schedule like below:
1 script - 1-250k (Query finish less than 5 mins)
<interval 5 mins>
1 script - 250k-500k (Query finish less than 5 mins)
<interval 5 mins>
1 script - 500k-750k (Query finish less than 5 mins)
<interval 5 mins>
1 script - 750k-1M (Query finish in 1++ hours)
<interval 5 mins>
1 script - 1M-1.25M (Query finish in 1++ hours)
<interval 5 mins>
1 script - 1.25M-1.50M (Query finish in 1++ hours)
END
After the 4th query, the query seems to work very slow, and this problem only raise on windows 2003 with mssql 2005, current server that run smoothly is win2k with mssql2000.
anyone have any idea on this problem either cause by operating system and database or related to something else?
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Jul 23, 2005
Hi all,I would like to perform anINSERT INTO LINKEDSVR.dbo.xyz.abcSELECT ... FROM dbo.dfgwhere LINKEDSVR is a linked server on another machine. Both servers arerunning SQLServer 2000 and have the DTC running.When I run this batch from QueryAnalyzer without explicitly usingtransactions, it works well (takes about 5 sec) - however, when Ienclose it usingbegin [distributed] tran/commit tranthe query runs forever.I also tried to use the local server as linked server (loopback) but itdid not work either.Any suggestions?Thanks,Jo
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Jul 20, 2005
Hi there,I've a table with 18 millions of recordes shaped like this :Code nvarchar(80) , State int , school int , class int , Term nvarchar(80)The following query takes too long to run ( more than 2 hours )select State , school , class , term , count (term) as freqGroup by state , school , class , termHow may I speed up the query?My Pc is PIV (3.6 GHz) Intell , Win2003 Server , 512 MB of RAM, 80 GB of HDRegards,M.Mansoorizadeh
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Nov 15, 2007
Hello,
i've got a table where a single DELETE query takes about 6 seconds.
The table has about 25 cols and 5 constraints (1PK, 4 FK). No triggers no cascade.
What can be the reason and what can i do to accelerate?
Thanks
[Edit]
- MS SQL Server 2000
- Running on LOCAL, 2.99 GHz Pentium
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Apr 19, 2001
Hello All.
I tried to test Rebuildm.exe on my local server
1. Stoped Sql
2. Renamed master.mdf to master.mdf_old
3. Tried to start Sql (Does start of couse)
4. Run Rebuildm.exe ... and "Gonfigurating Sql server" message goes forever (I was waiting 1 1/2 hrs ... progress bar was running )
Do I miss some some steps ?
Tnanks
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Dec 14, 2007
I have a database with 2 almost identical tables.
Each one is about 1.2 Billion rows, 0.5 Tb each.
I've truncated one of them and started SHRINK DB WITH REORGANIZE PAGES
It is running already for 3 days.
When should I start to worry :)
Thank you in advance
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Sep 24, 2006
Hi,
I need to modify existing table in my database to varchar(max) from varchar(2000)
This table contains 30 million plus rows and has more than 70 columns.
now when i am running alter command for this it take too long(more than 9 mins) which is not acceptable. . Is their any way to reduce this execution time
Following is the query i am using for this
ALTER TABLE Receipt
ALTER COLUMN CUSTOM VARCHAR(MAX) NULL
Please let me know if you have any suggestion to improve this
TAI
Prashant
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Mar 27, 2007
We are using SQL Server 2005 mirroring with the witness server.
In most cases whenever a failover was triggered we saw it happen in a matter
of a few seconds. However, the last time it took about 15 minutes - we suspect
due to Connection being blocked.
Would appreciate any information on what could cause this?
We have 2 databases that run on the server.
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Oct 29, 2007
Hi,
we've created a ata Flow task to execute several aggregations. Our Task access database using OLE DB source and selects data out of our staging tables (we've analyzed the query using MS SQL Management Studio which didn't showed any issues). But when we try to run our dataflow task using SSIS (debug mode and DTEXEC from command line) we experince that tasks seem to stop during processing.
Unfortunately we didn't found a way to see long logfile entries which explain the issue to us.
We do use several aggregation tasks divided in 4 sequences. Unfortunately we just see one logical processor out of 4 logical processors working. It is a Windows 2003 SP2 machine with SQL 2005 SP2 on top of it.
Is there any solution to use all processors to one package for parallel execution?
So basically we experience two issues:
- SSIS seems to stop somewhere in thre middle
- SSIS just uses one processor instaed of all four
your advice is appreciated
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Nov 12, 2007
Hi,
We need to select rows from the database that have been recently inserted/updated. We have a main primary table (COMMIT_TEST) and a second update table (COMMIT_TEST_UPDATE). The update table contains the primary key and a LAST_UPDATE field which is a datetime (to tell us when an update occurred). Triggers on the primary table are used to populate the update table.
If we insert or update the primary table in a transaction, we would expect that the datetime of the insert/update would be at the commit, however it seems that the insert/update statement is cached and getdate() is executed at the time of the cache instead of the commit. This causes problems as we select rows based on LAST_UPDATE and a commit may occur later but the earlier insert timestamp is saved to the database and we miss that update.
We would like to know if there is anyway to tell the SQL Server to not execute the function getdate() until the commit, or any other way to get the commit to create the correct timestamp.
We are using default isolation level. We have tried using getdate(), current_timestamp and even {fn Now()} with the same results. SQL Queries that reproduce the problem are provided below:
/* Different functions to get current timestamp €“ all have been tested to produce the same results */
/*
SELECT GETDATE()
GO
SELECT CURRENT_TIMESTAMP
GO
SELECT {fn Now()}
GO
*/
/* Use these statements to delete the tables to allow recreate of the tables */
/*
DROP TABLE COMMIT_TEST
DROP TABLE COMMIT_TEST_UPDATE
*/
/* Create a primary table and an UPDATE table to store the date/time when the primary table is modified */
CREATE TABLE dbo.COMMIT_TEST (PKEY int PRIMARY KEY, timestamp) /* ROW_VERSION rowversion */
GO
CREATE TABLE dbo.COMMIT_TEST_UPDATE (PKEY int PRIMARY KEY, LAST_UPDATE datetime, timestamp ) /* ROW_VERSION rowversion */
GO
/* Use these statements to delete the triggers to allow reinsert */
/*
drop trigger LOG_COMMIT_TEST_INSERT
drop trigger LOG_COMMIT_TEST_UPDATE
drop trigger LOG_COMMIT_TEST_DELETE
*/
/* Create insert, update and delete triggers */
create trigger LOG_COMMIT_TEST_INSERT on COMMIT_TEST for INSERT as
begin
declare @time datetime
select @time = getdate()
insert into COMMIT_TEST_UPDATE (PKEY,LAST_UPDATE)
select PKEY, getdate()
from inserted
end
GO
create trigger LOG_COMMIT_TEST_UPDATE on COMMIT_TEST for UPDATE as
begin
declare @time datetime
select @time = getdate()
update COMMIT_TEST_UPDATE
set LAST_UPDATE = getdate()
from COMMIT_TEST_UPDATE, deleted, inserted
where COMMIT_TEST_UPDATE.PKEY = deleted.PKEY
end
GO
/* In our application deletes should never occur so we don€™t log when they get modified we just delete them from the UPDATE table */
create trigger LOG_COMMIT_TEST_DELETE on COMMIT_TEST for DELETE as
begin
if ( select count(*) from deleted ) > 0
begin
delete COMMIT_TEST_UPDATE
from COMMIT_TEST_UPDATE, deleted
where COMMIT_TEST_UPDATE.PKEY = deleted.PKEY
end
end
GO
/* Delete any previous inserted record to avoid errors when inserting */
DELETE COMMIT_TEST WHERE PKEY = 1
GO
/* What is the current date/time */
SELECT GETDATE()
GO
BEGIN TRANSACTION
GO
/* Insert a record into the primary table */
INSERT COMMIT_TEST (PKEY) VALUES (1)
GO
/* Simulate additional processing within this transaction */
WAITFOR DELAY '00:00:10'
GO
/* We expect at this point that the date is written to the database (or at least we need some way for this to happen) */
COMMIT TRANSACTION
GO
/* get the current date to show us what date/time should have been committed to the database */
SELECT GETDATE()
GO
/* Select results from the table €“ we see that the timestamp is 10 seconds older than the commit, in other words it was evaluated at */
/* the insert statement, even though the row could not be read with a SELECT as it was uncommitted */
SELECT * FROM COMMIT_TEST
GO
SELECT * FROM COMMIT_TEST_UPDATE
Any help would be appreciated, we understand we could make changes to the application/database to approximate what we need, but all the solutions have identified suffer from possible performance issues, or could still lead to missing deals (assuming the commit time is larger than some artifical time window).
Regards,
Mark
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Jul 17, 2006
Try this script to see what queries are taking over a second.To get some real output, you need a long-running query. Here's one(estimated to take over an hour):PRINT GETDATE()select count_big(*)from sys.objects s1, sys.objects s2, sys.objects s3,sys.objects s4, sys.objects s5PRINT GETDATE()Output is:session_id elapsed task_alloc task_dealloc runningSqlText FullSqlTextquery_plan51 32847 0 0 select count_big(*) from sys.objects s1, sys.objects s2,sys.objects s3, sys.objects s4, sys.objects s5 SQL PlanClicking on SQL opens the full SQL batch as a .txt file, including the PRINTstatementsClicking on Plan allows you to see the .sqlplan file in MSSMS========Title: Using a VB Script to show long-running queries, complete with queryplans.Today (July 14th), I found a query running for hours on a development box.Rather than kill it, I decided to use this opportunity to develop a scriptto show long-running queries, so I could see what was going on. (ReferenceRoy Carlson's article for the idea.)This script generates a web page which shows long-running queries with thecurrently-executing SQL command, full SQL text, and .sqlplan files. The fullSQL query text and the sqlplan file are output to files in your tempdirectory. If you have SQL Management Studio installed on the localcomputer, you should be able to open the .sqlplan to see the query plan ofthe whole batch for any statement.'LongestRunningQueries.vbs'By Aaron W. West, 7/14/2006'Idea from:'http://www.sqlservercentral.com/columnists/rcarlson/scriptedserversnapshot.asp'Reference: Troubleshooting Performance Problems in SQL Server 2005'http://www.microsoft.com/technet/prodtechnol/sql/2005/tsprfprb.mspxSub Main()Const MinimumMilliseconds = 1000Dim srvnameIf WScript.Arguments.count 0 Thensrvname = WScript.Arguments(0)Elsesrvname = InputBox ( "Enter the server Name", "Server", ".", VbOk)If srvname = "" ThenMsgBox("Cancelled")Exit SubEnd IfEnd IfConst adOpenStatic = 3Const adLockOptimistic = 3Dim i' making the connection to your sql server' change yourservername to match your serverSet conn = CreateObject("ADODB.Connection")Set rs = CreateObject("ADODB.Recordset")' this is using the trusted connection if you use sql logins' add username and password, but I would then encrypt this' using Windows Script Encoderconn.Open "Provider=SQLOLEDB;Data Source=" & _srvname & ";Trusted_Connection=Yes;Initial Catalog=Master;"' The query goes heresql = "select " & vbCrLf & _" t1.session_id, " & vbCrLf & _" t2.total_elapsed_time AS elapsed, " & vbCrLf & _" -- t1.request_id, " & vbCrLf & _" t1.task_alloc, " & vbCrLf & _" t1.task_dealloc, " & vbCrLf & _" -- t2.sql_handle, " & vbCrLf & _" -- t2.statement_start_offset, " & vbCrLf & _" -- t2.statement_end_offset, " & vbCrLf & _" -- t2.plan_handle," & vbCrLf & _" substring(sql.text, statement_start_offset/2, " & vbCrLf & _" CASE WHEN statement_end_offset<1 THEN 8000 " & vbCrLf & _" ELSE (statement_end_offset-statement_start_offset)/2 " & vbCrLf & _" END) AS runningSqlText," & vbCrLf & _" sql.text as FullSqlText," & vbCrLf & _" p.query_plan " & vbCrLf & _"from (Select session_id, " & vbCrLf & _" request_id, " & vbCrLf & _" sum(internal_objects_alloc_page_count) as task_alloc, " &vbCrLf & _" sum (internal_objects_dealloc_page_count) as task_dealloc " &vbCrLf & _" from sys.dm_db_task_space_usage " & vbCrLf & _" group by session_id, request_id) as t1, " & vbCrLf & _" sys.dm_exec_requests as t2 " & vbCrLf & _"cross apply sys.dm_exec_sql_text(t2.sql_handle) AS sql " & vbCrLf & _"cross apply sys.dm_exec_query_plan(t2.plan_handle) AS p " & vbCrLf & _"where t1.session_id = t2.session_id and " & vbCrLf & _" (t1.request_id = t2.request_id) " & vbCrLf & _" AND total_elapsed_time " & MinimumMilliseconds & vbCrLf & _"order by t1.task_alloc DESC"rs.Open sql, conn, adOpenStatic, adLockOptimistic'rs.MoveFirstpg = "<html><head><title>Top consuming queries</title></head>" & vbCrLfpg = pg & "<table border=1>" & vbCrLfIf Not rs.EOF Thenpg = pg & "<tr>"For Each col In rs.Fieldspg = pg & "<th>" & col.Name & "</th>"c = c + 1Nextpg = pg & "</tr>"Elsepg = pg & "Query returned no results"End Ifcols = cdim filenamedim WshShellset WshShell = WScript.CreateObject("WScript.Shell")Set WshSysEnv = WshShell.Environment("PROCESS")temp = WshShell.ExpandEnvironmentStrings(WshSysEnv("TEMP")) & ""filename = temp & filenameDim fso, fSet fso = CreateObject("Scripting.FileSystemObject")i = 0Dim cDo Until rs.EOFi = i + 1pg = pg & "<tr>"For c = 0 to cols-3pg = pg & "<td>" & RTrim(rs(c)) & "</td>"Next'Output FullSQL and Plan Text to files, provide links to themfilename = "topplan-sql" & i & ".txt"Set f = fso.CreateTextFile(temp & filename, True, True)f.Write rs(cols-2)f.Closepg = pg & "<td><a href=""" & filename & """>SQL</a>"filename = "topplan" & i & ".sqlplan"Set f = fso.CreateTextFile(temp & filename, True, True)f.Write rs(cols-1)f.Closepg = pg & "<td><a href=""" & filename & """>Plan</a>"'We could open them immediately, eg:'WshShell.run temp & filenamers.MoveNextpg = pg & "</tr>"Looppg = pg & "</table>"filename = temp & "topplans.htm"Set f = fso.CreateTextFile(filename, True, True)f.Write pgf.CloseDim oIESET oIE = CreateObject("InternetExplorer.Application")oIE.Visible = TrueoIE.Navigate(filename)'Alternate method:'WshShell.run filename' cleaning uprs.Closeconn.CloseSet WshShell = NothingSet oIE = NothingSet f = NothingEnd SubMain
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