Is The RDA PULL Slower In SQL Mobile Vs. SQL CE 2.0?
Jan 4, 2007
I have a CF application I'm porting from VS2003/SQL CE 2.0 to VS2005/SQL Mobile. I make extensive use of RDA and unfortunately there is a huge performance degredation for me going to SQL Mobile. Where most PULL's in 2.0 take no more than a second or 2 to complete, they are taking around 10 or 11 seconds in SQL Mobile. This is the time from when .PULL starts and ends, it does not include any code run before or after the .PULL is issued, so it definitely something during the PULL that is slower.
I have tried settins of 0,1,3, and 6 for the compression level, all gave similar results, around 10 or 11 seconds. I have also tried doing a .SubmitSQL right before the .PULL to see if a sort of cached connection would help, but it only shaved a second off the time in most cases.
These times are using the same IIS server, SQL server (2000 SP3a), and database. I have tried using a 2003 SE device, WM 5.0 device, WM 5.0 emulator, and 2003 SE emulator, all exhibit the same performance degradation.
I really need to figure this out or I can't move the product to 2005 as the synchronization times would be completely unacceptable to our customers. Has anyone else run into this problem or know of a solution to it?
Thanks!
-Manny
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Jul 20, 2005
I am begginner at best so I hope someone that is better can help.I have a stored procedure that updates a view that I wrote using 2cursors.(Kind of a Inner Loop) I wrote it this way Because I couldn'tdo it using reqular transact SQL.The problem is that this procedure is taking longer and longer to run.Up to 5 hours now! It is anaylizing about 30,000 records. I thinkpartly because we add new records every month.The procedure works like this.The first Cursor stores a unique account and duedate combination fromthe view.It then finds all the accts in the view that have that account duedatecombo and loads them into Cursor 2 this groups them together for datamanipulation. The accounts have to be grouped this way because aaccount can have different due dates and multiple records within eachaccount due date combo and they need to be looked at this way aslittle singular groups.Here is my procedure I hope someone can shead some light on this. Myboss is giving me heck about it. (I think he thinks Girls cant code!)I got this far I hope someone can help me optimize it further.CREATE PROCEDURE dbo.sp_PromiseStatusASBEGINSET NOCOUNT ON/* Global variables */DECLARE @tot_pay moneyDECLARE @rec_upd VARCHAR(1)DECLARE @todays_date varchar(12)DECLARE @mActivityDate2_temp datetimeDECLARE @tot_paydate datetime/* variables for cursor ACT_CUR1*/DECLARE @mAcct_Num1 BIGINTDECLARE @mDueDate1 datetime/* variables for ACT_CUR2 */DECLARE @mAcct_Num2 BIGINTDECLARE @mActivity_Date2 datetimeDECLARE @mPromise_Amt_1 moneyDECLARE @mPromise_Status varchar(3)DECLARE @mCurrent_Due_Amt moneyDECLARE @mDPD intDECLARE @mPromise_Date datetimeSELECT @todays_date =''+CAST(DATEPART(mm,getdate()) AS varchar(2))+'/'+CAST(DATEPART(dd,getdate()) AS varchar(2))+'/'+CAST(DATEPART(yyyy,getdate()) AS varchar(4))+''DECLARE ACT_CUR1 CURSOR FORSELECT DISTINCTA.ACCT_NUM,A.DUE_DATEFROM VWAPPLICABLEPROMISEACTIVITYRECORDS AOPEN ACT_CUR1FETCH NEXT FROM ACT_CUR1 INTO @mAcct_Num1 , @mDueDate1WHILE (@@FETCH_STATUS = 0)BEGINSELECT @rec_upd = 'N 'DECLARE ACT_CUR2 CURSOR FORSELECTB.ACCT_NUM,B.ACTIVITY_DATE,B.PROMISE_AMT_1,B.PROMISE_STATUS,B.CURRENT_DUE_AMT,B.DAYS_DELINQUENT_NUM,B.PROMISE_DATE_1FROM VWAPPLICABLEPROMISEACTIVITYRECORDS B (UPDLOCK)WHERE B.ACCT_NUM = @mAcct_Num1ANDB.DUE_DATE = @mDueDate1ORDER BY B.ACCT_NUM,B.DUE_DATE,B.ACTIVITY_DATE,CASEB.Time_ObtainedWHEN 0 THEN 0ELSE 1END Desc, B.Time_ObtainedOPEN ACT_CUR2FETCH NEXT FROM ACT_CUR2INTO @mAcct_Num2 ,@mActivity_Date2,@mPromise_Amt_1,@mPromise_Status ,@mCurrent_Due_Amt,@mDPD,@mPromise_DateWHILE (@@FETCH_STATUS = 0)BEGIN----CHECK------------------------------------------------------------------------DECLARE @PrintVariable2 VARCHAR (8000)--SELECT @PrintVariable2 = CAST(@MACCT_NUM2 AS VARCHAR)+''+CAST(@MACTIVITY_DATE2 AS VARCHAR)+' '+CAST(@MPROMISE_AMT_1 ASVARCHAR)+' '+CAST(@MPROMISE_STATUS AS VARCHAR)+''+CAST(@mCurrent_Due_Amt AS VARCHAR)+' '+CAST(@mDPD AS VARCHAR)+''+CAST(@mPromise_Date AS VARCHAR)--PRINT @PrintVariable2----ENDCHECK------------------------------------------------------------IF @mDPD >= 30BEGINSELECT @tot_pay = SUM(CONVERT(FLOAT, C.PAY_AMT))FROM vwAplicablePayments CWHERE C.ACCT_NUM = @mAcct_Num2ANDC.ACTIVITY_DATE >= @mActivity_Date2ANDC.ACTIVITY_DATE < @mActivity_Date2 + 15----CHECK------------------------------------------------------------------------DECLARE @PrintVariable3 VARCHAR (8000)--SELECT @PrintVariable3 ='Greater=30 DOLLARS COLLECTED'--PRINT @PrintVariable3----ENDCHECK------------------------------------------------------------ENDELSE IF @mDPD < 30BEGINSELECT @tot_pay = SUM(CONVERT(FLOAT, C.PAY_AMT))FROM vwAplicablePayments CWHERE C.ACCT_NUM = @mAcct_Num2ANDC.ACTIVITY_DATE >= @mActivity_Date2ANDC.ACTIVITY_DATE BETWEEN @mActivity_Date2 AND@mPromise_Date + 5----CHECK----------------------------------------------------------------------DECLARE @PrintVariable4 VARCHAR (8000)--SELECT @PrintVariable4 ='Less 30 DOLLARS COLLECTED'--PRINT @PrintVariable4----END CHECK------------------------------------------------------------END----------------------------------------MY REVISEDLOGIC-------------------------------------------------------IF @rec_upd = 'N'BEGINIF @mDPD >= 30BEGINSELECT @mActivityDate2_temp = @mActivity_Date2 + 15--DECLARE @PrintVariable5 VARCHAR (8000)--SELECT @PrintVariable5 =' GREATER= 30 USING ACTVITY_DATE+15'--PRINT @PrintVariable5ENDELSE IF @mDPD < 30BEGINSELECT @mActivityDate2_temp = @mPromise_Date + 5--DECLARE @PrintVariable6 VARCHAR (8000)--SELECT @PrintVariable6 =' LESS 30 USING PROMISE_DATE+5'--PRINT @PrintVariable6ENDIF @tot_pay >= 0.9 * @mCurrent_Due_Amt--used to be promise amtBEGINUPDATE VWAPPLICABLEPROMISEACTIVITYRECORDSSET PROMISE_STATUS = 'PK',TOTAL_DOLLARS_COLL = @tot_payWHERE CURRENT OF ACT_CUR2--This statement updates the time that the status was placedinto PK.IF @mPromise_Status IN ('PTP','OP')BEGINUPDATE VWAPPLICABLEPROMISEACTIVITYRECORDSSET Status_Date = @todays_dateWHERE CURRENT OF ACT_CUR2ENDSELECT @rec_upd = 'Y 'ENDIF ((@tot_pay < 0.9 * @mCurrent_Due_Amt) OR @tot_pay IS NULL)AND( @mActivityDate2_temp > @todays_date )--need to put 1dayof month here for snapshot9/01/2004BEGINUPDATE VWAPPLICABLEPROMISEACTIVITYRECORDSSETPROMISE_STATUS = 'OP'WHERE CURRENT OF ACT_CUR2--This statement updates the time that the status was placedinto OP which is the original Activity Date.--The record will hold this date until it goes into PK,PB,orIP.IF @mPromise_Status IN ('PTP','OP')BEGINUPDATE VWAPPLICABLEPROMISEACTIVITYRECORDSSET Status_Date = @mActivity_Date2WHERE CURRENT OF ACT_CUR2ENDENDELSE IF ((@tot_pay < 0.9 * @mCurrent_Due_Amt) OR @tot_pay ISNULL)AND( @mActivityDate2_temp <= @todays_date )--need to put 1dayof month here for snapshot 9/01/2004BEGINUPDATE VWAPPLICABLEPROMISEACTIVITYRECORDSSETPROMISE_STATUS = 'PB',TOTAL_DOLLARS_COLL = case when @tot_pay is nullthen 0 else @tot_pay endWHERE CURRENT OF ACT_CUR2--This statement updates the time that the status was placedinto PB.IF @mPromise_Status IN ('PTP','OP')BEGINUPDATE VWAPPLICABLEPROMISEACTIVITYRECORDSSET Status_Date = @todays_dateWHERE CURRENT OF ACT_CUR2ENDENDENDELSE IF @rec_upd = 'Y'BEGINUPDATE VWAPPLICABLEPROMISEACTIVITYRECORDSSETPROMISE_STATUS = 'IP',TOTAL_DOLLARS_COLL = 0WHERE CURRENT OF ACT_CUR2--This statement updates the time that the status was placedinto IP.IF @mPromise_Status NOT IN ('IP')BEGINUPDATE VWAPPLICABLEPROMISEACTIVITYRECORDSSET Status_Date = @todays_dateWHERE CURRENT OF ACT_CUR2ENDENDFETCH NEXT FROM ACT_CUR2 INTO @mAcct_Num2,@mActivity_Date2,@mPromise_Amt_1,@mPromise_Status ,@mCurrent_Due_Amt,@mDPD,@mPromise_DateENDCLOSE ACT_CUR2DEALLOCATE ACT_CUR2FETCH NEXT FROM ACT_CUR1 INTO @mAcct_Num1 , @mDueDate1ENDCLOSE ACT_CUR1DEALLOCATE ACT_CUR1SET NOCOUNT OFFENDGO
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Mar 1, 2008
hi, friends, please look at this:
I have a SSIS package, and inside it I do something like below:
1. I have a SQL component, to give back a object to store the records.
2. I have a VB script component, I direct the object I got in 1 step into the script as a dataset.
My problem is:
I run the package in the SQL SERVER 2005 Store Procedue like this:
do
dtexec.exe package.dtsx
loop untill i>t
I control the it runs 30 times. But I found that the speed is slower and slower.
the first time, it takes about 600 s, but the last time, it takes the 1800 s.
Why?
The package don't drop the object it create during the loop in the Store Procedue ?
Thanks!
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Apr 25, 2007
Hi all,
I have following problem:
I'm developing a Windows Mobile application, which is using RDA Pull for retrieving data from SQL Server 2005 database to PDA. Please, see the example:
Code Snippet
using (SqlCeEngine engine = new SqlCeEngine(connStr))
{
engine.CreateDatabase();
}
serverConnStr="Provider=SQLOLEDB;Data Source=.;User ID=sa;Initial Catalog=Demo;Password=xxx";
using (SqlCeRemoteDataAccess rda = new SqlCeRemoteDataAccess(
Configuration.Default.SyncServerAddress, "", "", connStr))
{
rda.Pull("MyTable", "SELECT * FROM mytable", serverConnStr, RdaTrackOption.TrackingOffWithIndexes, "ErrorTable");
}
Everythink works fine, when I use 'sa' user account in serverConnStr.
But, when I change conn string to:
"Provider=SQLOLEDB;Data Source=.;User ID=test;Initial Catalog=Demo;Password=test"
the sqlcesa30.dll cannot connect to SQL Server database.
In the sqlcesa30.log then I found following line:
Code Snippet
2007/04/17 10:43:31 Thread=1EE30 RSCB=16 Command=PULL Hr=80040E4D Login failed for user 'test'. 18456
The user 'test' is member of db_owner, db_datareader and public roles for the Demo database and in SQL Server Management Studio I'm able to login to the Demo database with using the 'test' users credentials and I'm able to run the select command on 'mytable'.
So, what's wrong? Why the sqlcesa30.dll process cannot login to the Demo database, and from another application with using the SAME connection string it works?
Please help.
Thank you.
Fipil.
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Aug 8, 2006
Dear ppl,
I am writing an application for a device (MDA Pro T-Mobile) having Windows Mobile 5.0 using
-MS .NET Compact Framework 2.0 SP-1
-SQL Mobile 2005.
-VS 2005 .NET
The application uses Merge Replication. The error occurs in the Synchronise() Method of the SqlCeReplication object.
"SQL Server Mobile encountered problems when opening the database."
repl.AddSubscription(AddOption.CreateDatabase);
repl.Synchronize();
I don't understand why I am having this error. It does create the database on AddSubscription() method but it is failing opening the database on Synchronise(). I have also tried uninstalling and then reinstalling all the SQL Mobile components in the following order.
-sqlce30.wce5.armv4i.cab
-sqlce30.repl.wce5.armv4i.cab
-sqlce30.dev.ENU.wce5.armv4i.cab
However, when i run this application on a device(Dell X50 AXIM) with Pocket PC 2003, it runs fine creating the database and sysnchronising it.
The target platform for the project is Windows Mobile 5.0 Pocket PC SDK.
Does any one have any clue what could be the problem ?
Regards
Nabeel
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Jun 15, 2006
I am migrating a pocket PC application from VS 2003 to VS 2005 and a few weeks ago I hit the following problem when replicating
A SQL Mobile DLL could not be loaded. Reinstall SQL Mobile. [ DLL Name=sqlceca30.dll]
Scanning forums for help I saw that other people had had this problem and one
http://www.eggheadcafe.com/aspnet_answers/NETFrameworkCompactFramework/Feb2006/post25814466.asp
suggested that this problem could be circumvented by getting the replication object early and then continuously using the same object for subsequent replications.
I did this and it works a lot better now but ever so often I get another error which is
Native Error 28559 SQL Mobile encountered problems when opening the database
My only option at this point is to stop and start the application which cures the problem.
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Mar 23, 2006
Hello,
I am developping a non-managed C++ application for PocketPC using a SQL Server mobile database.
The application is compiled for PocketPC 2003 and uses SQL Server Mobile v2. I use Visual Studio 2005. But I need to compile the application for Windows Mobile 5.0 devices. So I installed the WM5 SDK and had the WM5 into my project configuration.
The "ssceoledb.h" which I include incluses the "transact.h" file. But my problem is that this file is only provided with the PocketPC 2003 SDK and not in the WM5 SDK.
So I cannot use the WM5 configuration project with SQL Server. I also tried with the last SQL Server Mobile 2005 (ie v3.0) and the "ssceoledb30.h" also includes "transact.h".
Did I miss something to install ?
Do you know how I can resolve the problem ?
By advance, thank you for any answer.
--
Gregoire
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May 18, 2006
Using MS VS 2005 (incl SQL Server Mobile)
MS Pocket PC 2005 SDK
I am working on a project that builds for Pocket PC on both Mobile 2003 and Mobile 5. The project uses/will use SQL Server Mobile to store local data.
Project created from new with support for both platforms. I include required header files ssceerr30.h and ssceoledb30.h.
Project builds fine in WM2003 configuration, release and debug.
When I build for WM5 the compiler cannot find the header file transact.h. This is included from within ssceoledb30.h. Same as under WM2003.
In WM2003 configuration if I highlight the ssceoledb30.h include in Visual Studio and open the header, it takes me to <Visual Studio dir>SmartDevicesSDKSQL ServerMobilev3.0. I then locate the include for transact.h and do the same, which takes me <Visual Studio dir>SDKPocketPC2003include. The file exists.
If I repeat the above 'browsing' under the WM5 configuration, ssceoledb30.h takes me to a different copy in the WM5 SDK directory. There is no diff between the file here and the other copy used by WM2003. If I attempt to open transact.h - file does not exist.
Fix (which I'm not too sure about, i.e. is it OK?) - If I copy transact.h to the WM5 SDK directory, the project builds.
Why has transact.h disappeared from WM5 SDK?
I can find no ref's to this problem anywhere. Is my installation of the WM5 SDK corrupt? What else could I be missing?
Is there a sample for SQL Server mobile (like the NorthwindOLEDB sample) that comes configured to build for WM5?
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Mar 6, 2006
It is possible to access a Sql Server 2005 Mobile database in a VS2003 application (compact framework) ?
Thanks
Robson
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Sep 8, 2007
I receive error 25123 on my PPC (audiovox 6600) in a reproducable way (usually) with .net 2.0 application that is using SQL CE that I wrote:
Open the application
Connect to the database
Close the applicaton
Re-Open the application
Connect to the database <-- Error occurs
I will also receive the error if my application isn't the first application launched (or very close to the first to launch).
I don't believe it's a memory issue as according to the memory manager I have plenty of memory:
At boot up only start screen items loaded: 18.46 Used 49.89 Free
Launch Resco File Explorer to click EXE: 19.18 Used 49.18 Free
Launch my application (no DB connection): 23.64 Used 44.71 Free
Connect to the DB and do select count(*) from a table with 0 rows: 26.27 Used 42.08 Free
Close the application (this.Close() on the form: 19.38 Used 48.97 Free
Relaunch App and connect to DB receive error: around 38 Used around 30 free
I was unable to reproduce the issue right now while typing this message, the last sets of numbers are from memory, and include other applications that are currently running.
The only way I have to get SQL CE to load again is to soft reset the PPC. If the application is able to connect to SQL CE at least once it is fine up till I close it and re-open the application. So it either connects and runs great, or it can't connect at all.
Any help in resolving this issue would be greatly appreciated.
Wayne
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Apr 24, 2006
Hi folks, I'm new to Windows Mobile progamming, and new to this forum. Apologies in advance if I'm asking a boneheaded question, but I've done searches and can't find anything directly applicable to my problem.
I'm currently walking through the published MS tutorial in setting up an SQL Server 2005 Mobile application that subscribes to a publication on SQL Server 2005 to exchange information.
I've gotten almost all the way through... successfully set up the server components, creating the publication, etc. On the mobile side, I've been able run the cab files to install the SQL Mobile components and to create the project, add the reference to the dll, and instantiate an engine object. It compiles.
The step in the tutorial after that, though, where you specify the data source from the "data" menu, I've got a problem. When I try to use the "new connection" dialog from choosing the data connection, "MS SQL Server Mobile Edition" doesn't show up as a choice. I've tried choosing any of the other combinations, and in teh subsequent "Connection properties" section my database, SQLMobile (as in their sample) is available, but I get an error when I choose it and click OK. Clicking on "Test Connection" gives me a connection successful message.
My guess is that something about the Mobile server side components is not installed correctly on my development machine, but honestly I have no idea how to begin to fix it. Has anyone seen this problem before and know how to resolve it?
Your time and any knowledge sharing is greatly appreciated.
Thank you,
-Dana
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Jul 21, 2006
This is a great tutorial and it's a shame one of the more important steps was missed.
In the €œCreate the snapshot user€? section you you find the steps to create the snapshot_agent account. Then in the €œCreate the snapshot folder€? section you find the share and folder permissions. However, at no point do the instructions advise you about adding the snapshot_agent to the SQL Server Logins. The result is that agent cannot perform the initial snapshot but you won't find this out until 50 steps later after Step 10 in the section €œCreate a new subscription".
To get back on track, openthe Object Explorer's Security section and add the snapshot_agent to your logins. Then using the "User Mappings", set an appropriate level for the SQLMobile database role. Once completed you then need to run the agent.
Right-click the SQLMobile publication you created and select "View Snapshot Agent status". From that dialog you can select "Start" to run the agent. When it completes, you can return to the tutorial section "Create a new subscription" and continue with the tutorial.
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Nov 3, 2007
I am studying the tutorial in SQL Server 2005 Mobile Edition Books Online, and the topic is Creating a Mobile Application with SQL Server Mobile. I have got a problem when creating a new subscription after created a new SQL Server Mobile database. And the problem is shown below:
New Subscription Wizard
- Beginning Synchronization (Success)
- Synchronizing Data (100%) (Error)
Messages
* Failure to connect to SQL Server with provided connection information. SQL Server does not exist, access is denied because the IIS user is not a valid user on the SQL Server, or the password is incorrect.
HRESULT 0x80004005 (29061)
* 無法完æˆ?作æ¥ã€‚
- Finalizing Synchronization (Stopped)
- Saving Subscription Properties (Stopped)
Before I have met this problem, I have finished all the task. And I can browse the localhost web site by using anonymous account even I use internet explorer or browse the directly in IIS.
Does anyone can solve it?? Thank you very much~~~
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Mar 22, 2007
I am not sure if this is the correct forum but here goes!
We rebuilt our SqlServer 2000 Trans replication the other night. It used to run in 3 hours but now it runs in 9.5 hours (7 hours bcp out, 2.5 hours bcp in). We have a dedicated distributor box (4 processors), a 4 processor publisher, and a 2 processor subscriber. None of the systems exhibited any processor stress or unusual disk activity. The network tests OK (tested with file xfers). But the bcp's wrote data at 2.5 to 4 minutes per 100k rows, and they loaded the data at about 100k rows in 10 seconds or less.
As you know, Replication Snapshot uses bcp on each source table to build a collection of flat-files. Then it uses bcp to load those files into the subscribing tables. Because bcp is the workhhorse here, I decided against posting this in the Replication forum.
The only change I know of is increasing MaxBcpThreads from 4 to 8. This parameter specifies the number of bulk-copy operations that can be performed in parallel. I was thinking that 8 bcp's might somehow be killing the drive where all the bcp files are written.
Any ideas?
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Apr 12, 2007
I installed SP2 two days ago and it seems like my SSIS-packes now take longer time than before - the very opposite of what I was hoping for.
Anyway, here are some data from runs on our performance environment. No new data is added to the source database between the runs, but I do a full process of the cubes every time (time is in seconds):
Package...............................SP1...............................SP2
Load dimensions..................200.................................270
Load fact data.......................800...............................1600
Process cubes....................2100...............................2600
So, as you can see, everything is going slower with SP2. I have yet to look into if there are any specific steps in the packages that take longer time than before, but it's odd that all packages take a longer time to execute. Especially that cube processing is slower suprises me.
Has anyone experienced something similar? Thanks!
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Nov 14, 2000
Hi gurus
I haven't put the code in since I've tried several variations & keep having the same problem: I'm hoping someone will recognise the problem from a description of it.
There are two parts to my query.
* Part 1 creates and then populates a temporary table
* Part 2 is a select query which joins the temporary table to a permanent table, on 2 fields including a datetime field. The data types on each side of the join are identical.
If I run the first part of the query through ISQL and wait for it to complete before running the second part (in the same ISQL window), it (the second part) takes just 3 minutes. However, if I run both parts together, the second part takes ages, in fact I'm not sure if it completes at all (could wait indefinately!).
I tried placing a 'GO' between the two queries when running them together, but it didn't seem to help.
Please help, I'm stumped.
Thanks
Jo
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Oct 13, 2004
I have database, Visual basic as front end, and sql server as backend, the reports are using crystal report. Recently, the user complain it is too slow to run, it took a long to load the data, anybody help me? Thanks in advance.
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Oct 29, 2005
I am new to SSIS and probably doing some mistake while transferring data from oracle source to oracle destination. Please guide me.. In our project we need to transfer nearly 80 GB data from old system (Oracle 9i) to new system (Oracle 10 G Release 2). To do this exercise we are testing and comparing performance and cost effectiveness between different tools like SSIS, DTS and SQL * Loader (oracle built in tool). We have selected one table, which is having 40 fields with 3 million records. The destination table is also having same structure. Surprisingly SSIS is giving slower performance than DTS!!!!! It is taking more than two hours or nearly two hours. I have tested the same process 3 times. I have used two servers (1 GB RAM, Dual processor) for source and destination with minimum load and used data flow task (OLEDB Source and OLEDB Destination). In case of transferring data from Oracle to SQL SERVER I am finding €œFast Loading Option€? in data access mode, which is giving considerable performance boosting. But while transferring data from Oracle to Oracle I am not finding €œFast Loading Option€? !!!!!!!!! For performance boosting which provider I should use?? Please suggest me€¦ if any one can€¦ would remain grateful to him€¦ Thanks and Regards Sudripta Rakshit.
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Jan 14, 2008
I copied a code from one proc and created new proc with the same code but different name. Using the same parameter for both procedures I got the different time of execution. New one is 4 times slower. I went through execution plan and could not find any changes. Does anyone have any experiance like this?
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Feb 2, 2007
Hi,We have a C# web application that has been running for a few years now with little maintenance. Over the past few months, we have had some increasing problems.1. Loses session frequently ~ every 2-3 minutes.2. Occasionally (every 2 months) get out of memory exceptions.3. Connections to the DB and therefore the whole site run fast after restart. Gets continuously slower and slower over time until it starts throwing timeouts: System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed
prior to completion of the operation or the server is not responding. The timeouts usually come every 3 weeks or so. Number 3 is the biggest problem for us, but I thought maybe 1 or 2 give some indication to why 3 is happening?I don't have much time to look into this now as I'm working on another project, but I was hoping that maybe someone would have ideas just looking at our symptoms.Thank you so much,Christie
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May 3, 2001
I know this won't be a lot to go on but, we has a quad processor box that is doing a lot of sql crunching. When we turn off three of the processors it runs the SQL queries faster. The requests are comming from COM objects. CPU, Memory, page faults, all that stuff is fine. Also SQL dosen't appear to be using all the processors as only 1 has any amount of usage?. Any suggestions of where to start would be most appreaciated.
Mike
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Jun 12, 2002
Ok,
here's a funky one That I can't find an expanation for. If I go into EM and choose a table from a database and return all rows, I get immediate results and can start browsing records. If I go into query analyzer and do a select * on the same table, it takes up to 20-25 minutes to return the result set. This used to only take like 5 mins. What gives? Anyone seen this before?
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Aug 24, 2004
I have an issue with the BCP util, it is extremely slow when running a BCP in to the same database on an A/P cluster vs. Standalone system. It is a vendor application, so I have little control as to what I can do. The BCP runs from a jobserver (remote) through the network, but it runs the same way in the standalone system, yet the process is about 10X as slow with the cluster, and the only diff is cluster vs. standalone.
SQLClusterName is specified in -S, not the active node, and it uses a trusted connection, not a local account. Is there anything about a cluster config that would cause the BCP to run slower ?
Any thoughts ??
Thanks,
Paul
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Mar 29, 2007
Hi there,
I am an application programmer who uses SQL Server; I'm not an expert and just know the basics. Our application has approximately 300 SQL tables and each table has just one primary index. We don't have stored procedures and only have 3 Views that a couple of reports use. Our database is approximately 26GB in size. We are planning on migrating from SQL 2000/Windows Server 2000 to SQL 2005/Windows Server 2003. Before doing this I decided to do some bench mark testing. I chose a simple SELECT statement on one of our larger tables. On SQL 2000 it ran in 22 seconds whereas on SQL 2005 it ran in 34 seconds.
These are the steps I have done to try and improve performance, all to no avail.
I tried both a passive and active upgrade and the results were the same. The passive way was to remove 2000, install 2005, create a new database and restore from a 2000 backup into the new 2005 database. The active way was to leave 2000 on the server with the database attached and upgrading to 2005.
I did not change any defaults on the database except I have set the compatibility level to SQL 2005.
The collation is set to SQL_Latin1_General_CP1_CS_AS.
I have run an Optimize Index Task.
I have run a Rebuild Index Task.
I have run an Update Statistics Task.
I have defragged the drive that the database resides on.
Can anyone explain why SQL 2003 is dramatically slower than 2000? Any help would be greatly appreciated.
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Mar 29, 2007
Hi there,
I am an application programmer who uses SQL Server; I'm not an expert and just know the basics. Our application has approximately 300 SQL tables and each table has just one primary index. We don't have stored procedures and only have 3 Views that a couple of reports use. Our database is approximately 26GB in size. We are planning on migrating from SQL 2000/Windows Server 2000 to SQL 2005/Windows Server 2003. Before doing this I decided to do some bench mark testing. I chose a simple SELECT statement on one of our larger tables. On SQL 2000 it ran in 22 seconds whereas on SQL 2005 it ran in 34 seconds.
These are the steps I have done to try and improve performance, all to no avail.
I tried both a passive and active upgrade and the results were the same. The passive way was to remove 2000, install 2005, create a new database and restore from a 2000 backup into the new 2005 database. The active way was to leave 2000 on the server with the database attached and upgrading to 2005.
I did not change any defaults on the database except I have set the compatibility level to SQL 2005.
The collation is set to SQL_Latin1_General_CP1_CS_AS.
I have run an Optimize Index Task.
I have run a Rebuild Index Task.
I have run an Update Statistics Task.
I have defragged the drive that the database resides on.
Can anyone explain why SQL 2003 is dramatically slower than 2000?
Any help would be greatly appreciated.
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Jul 23, 2005
-- I have a situation where doing-- first example-- 1. Get series of values througha query into a string (@val)like'1,2,3,4':declare @val varchar(4000)select @Val = @val + cast(myval as varchar) + ',' -- myval is aninteger variablefrom xyzwhere xyz.field = 33SET @val = left(@val, len(@val) - 1)-- 2. EXEC a query using IN (' + @val + ')'EXEC('select *from qprwhere qpr.fieldx IN (' + @val + ')')-- is much faster than doing-- second exampleselect *from qprwhere qpr.fieldx IN (select myvalfrom xyzwhere xyz.field = 33)-- Since second example does not have a correlateed query, why is itslower?-- Thanks in advance,-- Caveman
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Mar 29, 2007
Hi there,
I am an application programmer who uses SQL Server; I'm not an expert and just know the basics. Our application has approximately 300 SQL tables and each table has just one primary index. We don't have stored procedures and only have 3 Views that a couple of reports use. Our database is approximately 26GB in size. We are planning on migrating from SQL 2000/Windows Server 2000 to SQL 2005/Windows Server 2003. Before doing this I decided to do some bench mark testing. I chose a simple SELECT statement on one of our larger tables. On SQL 2000 it ran in 22 seconds whereas on SQL 2005 it ran in 34 seconds.
These are the steps I have done to try and improve performance, all to no avail.
I tried both a passive and active upgrade and the results were the same. The passive way was to remove 2000, install 2005, create a new database and restore from a 2000 backup into the new 2005 database. The active way was to leave 2000 on the server with the database attached and upgrading to 2005.
I did not change any defaults on the database except I have set the compatibility level to SQL 2005.
The collation is set to SQL_Latin1_General_CP1_CS_AS.
I have run an Optimize Index Task.
I have run a Rebuild Index Task.
I have run an Update Statistics Task.
I have defragged the drive that the database resides on.
Can anyone explain why SQL 2003 is dramatically slower than 2000? Any help would be greatly appreciated.
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Mar 24, 2007
Hi all,
In order to return a table for a specific input parameter, I am using Function, but the performance is just awful! After I have tried same code as SP, the whole thing is running under 1 sec (like 0.5 sec), while the function is about 10 times slow (4-6 sec). I know in SQL 2000 function is slower than SP, but that cannot be as bad as 10 times slower.
Now, in order to use that table from SP, I have to create a temp table, then insert result into that temp table, before I can direct use any "select" sentence. Any explanation here? Or how to "select" from a SP directly?
Thanks,
Ning
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Apr 19, 2006
I have a table valued UDF with only one SELECT query. It selects from a View, and has a couple of joins and calls another UDF in the WHERE clause. When I run the Select query itself it's duration is around 120, but when I have it wrapped in a UDF, it's around 1200!
ALTER FUNCTION [dbo].[fnGetiii]
(
bla bla bla
)
RETURNS @ItemTable TABLE
(
a varchar(2),
b bigint,
c smallmoney,
d varchar(50),
e varchar(50),
f int,
g varchar(50),
h datetime,
i int,
j int,
k int
)
AS
BEGIN
INSERT INTO @ItemTable
(a,b,c,d,e,f,g,h,i,j,k)
SELECT
vat.a AS a,
vat.b AS b,
vat.c AS c,
vat.d AS d,
vat.e AS e,
vat.f AS f,
vat.g AS g,
vat.h AS h,
vat.i AS i,
vat.j AS j,
vat.k AS k
FROM dbo.vw_jkl vat
LEFT JOIN dbo.uio uio
LEFT JOIN dbo.iop iop
ON (iop.kko = uio.kko)
ON (uio.jj = vat.jj)
WHERE this = that AND
this = that AND
this IN (SELECT iii FROM dbo.fniiireturn(pppp))
RETURN
END
How can I speed it up?
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Aug 22, 2007
I was tasked with optimizing a query that was taking about 2.5 minutes to run. It is now running in 2 seconds, so great, it's working....except I don't understand why. The ONLY change made is the where...
Here is the origional
Code Snippet
WHERE (j.datelaunched > GETDATE() - 7 OR (j.jobtype_id = 2 AND j.datecreated > GETDATE() - 30)
Here is the optomized
Code Snippet
WHERE (j.datelaunched >= DATEADD(DD, DATEDIFF(DD,0,GETDATE() - 7), 0) OR (j.jobtype_id = 2 AND j.datecreated >= DATEADD(DD, DATEDIFF(DD,0,GETDATE() - 30), 0)))
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Sep 16, 2007
Hi:
When I try and connecto to SQL CE I always get an invalid operation exception. I"m afraid that I did not follow the proper install for Orcas Beta 2. I can't remember if I was supposed to uninstall SQL Mobile 2005 first or not.
All I know is when I try and use my SQL CE I can't connecto to a DB / sdf file ?
Any help would be appreciated I"m just starting to use SQL CE.
thanks
mark
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May 9, 2005
I have a table in which 2 of the fields are defined as TEXT. It was determined that neither of these fields would have to hold more than 3500 characters, so I changed both fields to VARCHAR (3500). The problem is that any query against this table takes 20 seconds to run. When the fields were defined as data type TEXT, queries ran lick-itty-split!? I would have expected just the opposite. Can someone explain this behavior?
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