I am running A View that INSERTS into #Temp Table - On Only Certain Days the INSERT Speed into #tempDB is so slow.
Â
Attached snapshot that shows after one minute so many few records are inserted - and it dosent happen every day somedays its very fast.Â
Hello all.
I have the following table
Create Table Item(
I_AssetCode NVarChar(40) Primary Key NOT NULL,
I_Name NVarChar(160),
I_BC nvarchar(20),
I_Company nvarchar(20)
);
Create Index ind_Item_Name on Item(I_Name);
Create Index ind_Item_BC on Item(I_BC);
Create Index ind_Item_Company on Item(I_Company);
It is populated with 50 000 records.
Searching on indexed columns is fast, but I've run into the following problem:
I need to get all distinct companies in the table.
I've tried with these two queries, but they both are very slow!
1. "select I_Company from item group by I_Company " - This one takes 19 seconds
2. "select distinct(I_Company) from item" -This one takes 29 secons
When I ran them through the SQL Management Studio and checked the performance plan, I saw that the second one doesn't use index at all ! So I focused on the first...
The first one used index (it took it 15% of the time), but then it ran the "stream aggregate" which took 85% of the time !
Actully 15% of 19 seconds - about 2 seconds is pretty much enough for me. But it looks that aggregate function is run for nothing!
So is it possible to force the query engine of the SSCE not to run it, since there is actually no aggregate functions in my select clause?
According to SQL CE Books online:
Group By
"Specifies the groups (equivalence classes) that output rows are to be placed in. If aggregate functions are included in the SELECT clause <select list>, the GROUP BY clause calculates a summary value for each group."
It seems the aggregate is run every time, not only when there is an aggregate function.
Is this a bug?
Thanks in advance,
TipoMan
Hello,
I have the same database on two different servers. One for production and one for testing. A view that I use runs in less than 2 seconds on the test system, but takes almost 2 minutes on the production server.
What I have noticed is on the test server the view will use an index. The production server ends up scanning a whole table. All indices are the same on both machines for the tables involved and I have updated the statistics. I even went through the process of creating a new table with its indices for the table that is being scanned. Both machines have had service pack 1 installed on them.
Any ideas?
Hi All
I decided to change over from Microsoft Access Database file to the New SQLServerCe Compact edition. Although the reading of data from the database is greatly improved, the inserting of the new rows is extremely slow.
I was getting between 60 to 70 rows per sec using OLEDB and an Access Database but now only getting 14 to 27 rows per sec using SQLServerCe.
I have tried the below code changes and nothing seams to increase the speed, any help as I would prefer to use SQLServerCe as the database is much smaller and I€™m use to SQL Commands.
Details:
VB2008 Pro
.NET Frameworks 2.0
SQL Compact Edition V3.5
Encryption = Engine Default
Database Size = 128Mb (But needs to be changes to 999Mbs)
Where Backup_On_Next_Run, OverWriteQuick, CompressAns are Booleans, all other column sizes are nvarchar and size 10 to 30 expect for Full Folder Address size 260
TRY1
Direct Insert Using Data Adapter.
Me.BackupDatabaseTableAdapter1.Insert(Group_Name1, Full_Folder_Address1, File1, File_Size_KB1, Schedule_To_Run1, Backup_Time1, Last_Run1, Result1, Last_Modfied1, Last_Modfied1, Backup_On_Next_Run1, Total_Backup_Times1, Server_File_Number1, Server_Number1, File_Break_Down1, No_Of_Servers1, Full_File_Address1, OverWriteQuick, CompressAns)
14 to 20 rows per second (Was 60 to 70 when using OLEDB Access)
TRY 2
Using Record Sets
Private Sub InsertRecordsIntoSQLServerce(ByVal Group_Name1 As String, ByVal Full_Folder_Address1 As String, ByVal File1 As String, ByVal File_Size_KB1 As String, ByVal Schedule_To_Run1 As String, ByVal Backup_Time1 As String, ByVal Last_Run1 As String, ByVal Result1 As String, ByVal Last_Modfied1 As String, ByVal Latest_Modfied1 As String, ByVal Backup_On_Next_Run1 As Boolean, ByVal Total_Backup_Times1 As String, ByVal Server_File_Number1 As String, ByVal Server_Number1 As String, ByVal File_Break_Down1 As String, ByVal No_Of_Servers1 As String, ByVal Full_File_Address1 As String, ByVal OverWriteQuick As Boolean, ByVal CompressAns As Boolean)
Dim conn As SqlCeConnection = Nothing
Dim CommandText1 As String = "INSERT INTO BackupDatabase (Group_Name, Full_Full_Folder_Adress, File1,File_Size_KB, Schedule_To_Run, Backup_Time, Last_Run, Result, Last_Modfied, Latest_Modfied, Backup_On_Next_Run, Total_Backup_Times, Server_File_Number, Server_Number, File_Break_Down, No_Of_Servers, Full_File_Address, OverWrite, Compressed) VALUES ('" & Group_Name1 & "', '" & Full_Folder_Address1 & "', '" & File1 & "', '" & File_Size_KB1 & "', '" & Schedule_To_Run1 & "', '" & Backup_Time1 & "', '" & Last_Run1 & "', '" & Result1 & "', '" & Last_Modfied1 & "', '" & Latest_Modfied1 & "', '" & CStr(Backup_On_Next_Run1) & "', '" & Total_Backup_Times1 & "', '" & Server_File_Number1 & "', '" & Server_Number1 & "', '" & File_Break_Down1 & "', '" & No_Of_Servers1 & "', '" & Full_File_Address1 & "', '" & CStr(OverWriteQuick) & "', '" & CStr(CompressAns) & "')"
Try
conn = New SqlCeConnection(strConn)
conn.Open()
Dim cmd As SqlCeCommand = conn.CreateCommand()
cmd.CommandText = "SELECT * FROM BackupDatabase"
cmd.ExecuteNonQuery()
Dim rs As SqlCeResultSet = cmd.ExecuteResultSet(ResultSetOptions.Updatable Or ResultSetOptions.Scrollable)
Dim rec As SqlCeUpdatableRecord = rs.CreateRecord()
rec.SetString(1, Group_Name1)
rec.SetString(2, Full_Folder_Address1)
rec.SetString(3, File1)
rec.SetSqlString(4, File_Size_KB1)
rec.SetSqlString(5, Schedule_To_Run1)
rec.SetSqlString(6, Backup_Time1)
rec.SetSqlString(7, Last_Run1)
rec.SetSqlString(8, Result1)
rec.SetSqlString(9, Last_Modfied1)
rec.SetSqlString(10, Latest_Modfied1)
rec.SetSqlBoolean(11, Backup_On_Next_Run1)
rec.SetSqlString(12, Total_Backup_Times1)
rec.SetSqlString(13, Server_File_Number1)
rec.SetSqlString(14, Server_Number1)
rec.SetSqlString(15, File_Break_Down1)
rec.SetSqlString(16, No_Of_Servers1)
rec.SetSqlString(17, Full_File_Address1)
rec.SetSqlBoolean(18, OverWriteQuick)
rec.SetSqlBoolean(19, CompressAns)
rs.Insert(rec)
Catch e As Exception
MessageBox.Show(e.Message)
Finally
conn.Close()
End Try
End Sub
€™20 to 24 rows per sec
TRY 3
Using SQL Commands Direct
Private Sub InsertRecordsIntoSQLServerce(ByVal Group_Name1 As String, ByVal Full_Folder_Address1 As String, ByVal File1 As String, ByVal File_Size_KB1 As String, ByVal Schedule_To_Run1 As String, ByVal Backup_Time1 As String, ByVal Last_Run1 As String, ByVal Result1 As String, ByVal Last_Modfied1 As String, ByVal Latest_Modfied1 As String, ByVal Backup_On_Next_Run1 As Boolean, ByVal Total_Backup_Times1 As String, ByVal Server_File_Number1 As String, ByVal Server_Number1 As String, ByVal File_Break_Down1 As String, ByVal No_Of_Servers1 As String, ByVal Full_File_Address1 As String, ByVal OverWriteQuick As Boolean, ByVal CompressAns As Boolean)
Dim conn As SqlCeConnection = Nothing
Dim CommandText1 As String = "INSERT INTO BackupDatabase (Group_Name, Full_Full_Folder_Adress, File1,File_Size_KB, Schedule_To_Run, Backup_Time, Last_Run, Result, Last_Modfied, Latest_Modfied, Backup_On_Next_Run, Total_Backup_Times, Server_File_Number, Server_Number, File_Break_Down, No_Of_Servers, Full_File_Address, OverWrite, Compressed) VALUES ('" & Group_Name1 & "', '" & Full_Folder_Address1 & "', '" & File1 & "', '" & File_Size_KB1 & "', '" & Schedule_To_Run1 & "', '" & Backup_Time1 & "', '" & Last_Run1 & "', '" & Result1 & "', '" & Last_Modfied1 & "', '" & Latest_Modfied1 & "', '" & CStr(Backup_On_Next_Run1) & "', '" & Total_Backup_Times1 & "', '" & Server_File_Number1 & "', '" & Server_Number1 & "', '" & File_Break_Down1 & "', '" & No_Of_Servers1 & "', '" & Full_File_Address1 & "', '" & CStr(OverWriteQuick) & "', '" & CStr(CompressAns) & "')"
Try
conn = New SqlCeConnection(strConn)
conn.Open()
Dim cmd As SqlCeCommand = conn.CreateCommand()
cmd.CommandText = CommandText1
'cmd.CommandText = "INSERT INTO BackupDatabase (€¦"
cmd.ExecuteNonQuery()
Catch e As Exception
MessageBox.Show(e.Message)
Finally
conn.Close()
End Try
End Sub
€˜ 25 to 30 but mostly holds around 27 rows per sec I
Is this the best you can get or is there a better way. Any help would be greatly appericated
Kind Regards
John Galvin
I have an Excel file with .csv extension . it has on sheet with name Sheet1.
Now, I'm trying to insert this Excel data into one #temp table. I tried with syntax:
----------------
Exec sp_configure 'show advanced options', 1;
RECONFIGURE;
GO
Exec sp_configure 'Ad Hoc Distributed Queries', 1;
RECONFIGURE;
GO
EXEC master.dbo.sp_MSset_oledb_prop N'Microsoft.ACE.OLEDB.12.0' , N'AllowInProcess' , 1;Â
[Code] ...
But, I'm getting error:
The OLE DB provider "Microsoft.ACE.OLEDB.12.0" for linked server "(null)" reported an error. The provider did not give any information about the error.
Cannot initialize the data source object of OLE DB provider "Microsoft.ACE.OLEDB.12.0" for linked server "(null)".
If I'm executing for .xls file this statement is working finr and rows are inserted into #temp table. How to take excel file of .csv extension??
Hi experts! I would like to ask for some help regarding Database Engine Tuning Advisor. I was trying to create Session Monitor then I choose TABLE as a workload. Then after creating and selecting the corresponding setup then I start the analysis, during the analysis it prompted an error?
Error MSG:
The specified workload(file or table) has no tunable events. Events must be one of the following types - SQL:BatchStarting, SQL:BatchCompleted, RPC:Starting, RPC:Completed, SP:StmtStarting or SP:StmtCompleted for workload trace file or table.
But if I tried to use the Workload FILE instead of the table the session is successful and completed the analysis. My SQL current setup is client only, I was just accessing the server. Pls help me how to fix or do I need to configure something? Badly needed your help experts. Thanks in advance.
Tatas move
Hi,
I'm just testing the database engine tuning advisor.
I created a basic trace file in SQL Server profiler by randomly opening a number of views in the Adventureworks db. I then used the Database Engine Tuning advisor to analyse this.
The tuning advisors recommendation was to drop about 2-3 dozen indexes, which sounds like a really dumb idea.
Is it normal for DET to recommend that any index not referenced by the workload file be dropped?
Hello all,I want to use the SQL Server 2005 Tuning Advisor on our database, andI'm hoping someone here can just confirm the steps for me. We have a10GB database that has a number of applications hitting it constantly,all performing many SELECTs, INSERTs and UPDATEs. Are the followingthe steps I need to take?1. Stop all the applications hitting the database.2. Make a backup of the database.3. Start the profiler on the original database.4. Turn on all the applications again.5. Wait for a time before turning off the profiler and saving theprofile.6. Run the tuning wizard against the backup database using the savedprofile.Do I have to do this every time or am I missing something obvious? I'munder the impression I need the backup because our database has a highvolume of INSERTs and UPDATEs so I have to make sure the state of thedatabase matches the state of the profile.As a matter of interest, why is it not possible for the tuning wizardto analyse the database using the *current* activity? Why does it haveto be a 'pre-recorded' workload?Many thanks,Tommy.
View 4 Replies View RelatedI have a the following query which takes long time
DECLARE @ACCOUNTS TABLE(ACCOUNT_ID INT)
INSERT INTO @ACCOUNTS
SELECT ACCOUNT_ID FROM ACCOUNT
WHERE A_DESCR in ('AA', 'BB', 'CC', 'DD', 'EE', 'FF', 'GG')
I used the following key words: sql server query tuning in operatorÂ
Hi to all,
I am using SQL 2005, when i am connecting to Database Engine Tuning Advisor i am getting an error messsage like this
Failed to open a new connection. Database Engine Tuning Advisor does not support SQL Express. (DTAClient)
Help me to slove my problem.
Thanks in advance.
Regards,
Jose.P
Hi,I find much regrettable that Database Engine Tuning Advisor be not part ofMS-Express Edition ... A server without such help is not a server.Besides, you've got the tutorials, but not the tool to play with :-(((Regards,JM Blaise
View 1 Replies View RelatedI was trying to get some indexing recommendations from the Database Engine Tuning Advisor by consuming a trace file with known indexing issues. After several minutes all it did was create a report or two which list existing indexes. Not very useful. I must be doing something wrong.
A message displays that "75% of the consumed workload has syntax errors." I guess it can't take a regular trace (.trc) file?
I am conderned that the trace file I used did not contain what the Advisor needs. Do I need to setup the trace a special way to support the Advisor?
Also, what does "Database for workload analysis" mean? I chose tempdb but there is no Help, and BOL is a maze of small uninformative snippets . . .
Thanks,
Michael
I have a very irritating error with Database Engine Tuning Advisor. While processing traces from Sql Profiler I keep getting trace log full of syntax error of most of queries - some of them very simple and ALL of them perfectly correct ( I check them separatly in QueryAnaliser ) - program gives recomendtation when I enter queries one by one - in that case the syntax is correct for Database Engine Tuning Advisor, but I just can't imagine why quries given to analysis in the set aren't correct? I dont' want to enter trace query by query (while I have thousends of them) !
It all seem like a Database Engine Tuning Advisor bug, any ideas about this problem?
Joanna
Hi to all,
I am using SQl 2005, when i am connecting to Database Engine Tuning Advisor i am getting an error message like this..
Failed to open a new connection. Database Engine Tuning Advisor does not support SQL Express. (DTAClient)
Help me to solve my problem. Thanks in advance.
Regards,
Jose.P
Does anyone know how to DTA to correctly read the output from the Profiler?
I get the error:
TITLE: DTAEngine
------------------------------
50% of consumed workload has syntax errors. Check tuning log for more information.
------------------------------
BUTTONS:
OK
------------------------------
And the log is full of lines like:
E000 SELECT COUNT(*) FROM Pictures WHERE AdRecId = 16329 2 [Microsoft][SQL Native Client][SQL Server]Invalid object name 'Pictures'.
E000 exec GetAd @RecId=15282 8 [Microsoft][SQL Native Client][SQL Server]Could not find stored procedure 'GetAd'.
E000 exec GetAd @RecId=15385 4 [Microsoft][SQL Native Client][SQL Server]SHOWPLAN permission denied in database 'xxx'.
Does anyone know what causes this?
I do have showplan permission on the login I use for tuning.
Hello,
I am sure you have heard of Community server - if not you are just using it ;)
I decided to try to optimise the performance of my site, run a trace and then DETA.
And I am getting errors like these:
E000 exec dbo.cs_user_Get @UserName=N'jded',@UserID=0,@IsOnline=0,@LastAction=N'',@SettingsID=1000 122 [Microsoft][SQL Native Client][SQL Server]Could not find stored procedure 'dbo.cs_user_Get'.
exec dbo.cs_thread_IsTracked @ThreadID=5969,@UserID=28236,@SettingsID=1000,@IsTracked=@p4 output
select @p4 1 [Microsoft][SQL Native Client][SQL Server]Could not find stored procedure 'dbo.cs_thread_IsTracked'.
E000 declare @p4 bit
set @p4=0
exec dbo.cs_thread_IsTracked @ThreadID=414,@UserID=1001,@SettingsID=1000,@IsTracked=@p4 output
select @p4 1 [Microsoft][SQL Native Client][SQL Server]Could not find stored procedure 'dbo.cs_thread_IsTracked'.
E000 exec dbo.cs_Section_GetSectionIDByPostID @SettingsID=1000,@PostID=44641 1 [Microsoft][SQL Native Client][SQL Server]Could not find stored procedure 'dbo.cs_Section_GetSectionIDByPostID'.
The "trouble" is that those sprocs do exist and that the site apparently is working fine. But not for DETA. As far as DETA is concerned... 54% of my processing power is used to serve syntax errors!
A couple of hints.
The database was an upgrade from 2000.:
- I changed the compatibility level to 2005 but no luck there. I tried with a brand new database, and the errors keep cropping up.
B. The errors were observed in a kit that comprises of a 32bit IIS and 64bit SQL2005 and thought that it had to do with the connectivity of those two.
- I run the traces in one (32bit) server that hosts both IIS and SQL and I am getting the same errors.
Any help will be greatly appreciated.
Thank you.
Hey all,
I am interested in finding out if anyone out there has experience with extremely high-performance SQL Server applications. The I/O needs of my database server are growing very quickly, and I am on the verge of launching a major upgrade project.
We have done all the standard tuning tasks: proper indexing, stored procedure tuning, etc... and are running on good small-server scale hardware ( dual PIII 700s, 1G RAM, but no RAID). The only path I can see to achieving higher performance are:
- lots of RAID, perhaps on a SAN.
- server upgrade, maybe 4 proc? I've been looking at RAIDZONEs and Netfinity's
- data partitioning ( I REALLY want to avoid this if I can! )
What do you do when you need Major Enterprise scale database performance from SQL Server? I've found lots of resources for Oracle and DB2, but I can't find many case studies for serious SQL Server installations.
Help!
-Dave
Hi,
does the upgradition SQL Server 6.5 to 7.0 will simply solve some problems which we are facing currently like ODBC errors Insert failed and update failed and also supporting more users ?
We have Access front end to SQL Server backend, so do we need to touch code in front end for optimizations ?
Can any pls guide me on this
Thanks
Hi, i am working on sql server 6.5 version.actually this is developed just one year back. but now the system is almost dead(low performance).i think the reasons r database design,networking,hardware etc.is it correct. and how to rectify these errors. i am suggesting that upgradation is the best option.so pl give the suggestions asap.
Thanx
Janreddy
Hi,
Anyone know any articles on Performance Tuning on the web? I'm trying to monitor one of my production boxes and don't know which counters to use.
Thanks!
Joe R.
Hi All,
What are some of the things i can do to improve query performance if the querey performance is realatively slow today compared to yesterday's performance:
Here are some of things i looked at:
-updating statistics
-checking the execution plan
-DBCC showcontig
What all possible ways there have been to maximizing performance of database?
View 4 Replies View Relatedhow to increase performance through management studio
except making indexes
Hi Guys I need someone to assist me in having full understanding of what performance turning is. My Challenge is interpreting the System Monitor Graph of Performance tools.
I needed to know what does the value on vertical axis represent, while there is non on the horizontal axis rather I have Last, Average, Minimum, Maximum and Duration; Please What does all this value stands for, I indeed observe that when I click on any of the counters selected the value changes, therefore kindly assist me so that I can make meaning of this. Apart from all this please assist me with any material that can explain performance tuning to my maximum benefit, thanks in anticipation.
Pls Check below sample of the file is attached
Hi All,
I am new to this forum, would like to know about performance tuning methods in sql and which is the best site to read about it?
Thanks
Hi experts,
I've run sql profiler with %processor time counter .it showed a large value of 75
so please give me steps to tune the long running query with high cpu utilisation.
thanks in advance
i just wanna know how to reduce the performance of the query
can any one pls help me in the gaining the performance of query
SELECT
tblBankruptcyInfo.MasterID,
tblBankruptcyInfo.bk_Case_Number
INTO #ActiveBK
FROM FNFBSDataMart.dbo.tblReferral tblReferral WITH (NOLOCK)
INNER JOIN FNFBSDataMart.dbo.tblBankruptcyInfo tblBankruptcyInfo WITH (NOLOCK)
ON tblReferral.RefID = tblBankruptcyInfo.RefID
AND tblReferral.CloseDate IS NULL
INNER JOIN FNFBSDataMart.dbo.tblSuperClientFile tblSuperClientFile WITH (NOLOCK)
ON tblReferral.ClientFileID = tblSuperClientFile.ClientFileID
AND tblSuperClientFile.SuperClientVendorID IN (1816,125,127,1706,766,1820,137,141,144,145,1593,1808,146,990,1745,149,1215,1854,1867)
GROUP BY
tblBankruptcyInfo.MasterID,
tblBankruptcyInfo.bk_Case_Number
Hi all ,
I am doing performance tuning in sql
I have a query which it gives result in 70000 rows and time is taken 7 mints .
But i want one query is not more than 50000 row
my query is :-
SELECT
QPDMADM.LAR_OMEGA_TRANS_SUM.SOURCE_TRANSACTION_ID,
QPDMADM.LAR_OMEGA_TRANS_SUM.ORDER_DATE,
QPDMADM.LAR_OMEGA_TRANS_SUM.SHIP_DATE,
QPDMADM.LAR_OMEGA_TRANS_SUM.FISCAL_PERIOD,
QPDMADM.LAR_OMEGA_TRANS_SUM.DISCOUNT_AGREEMENT_ID,
QPDMADM.LAR_OMEGA_TRANS_SUM.PRODUCT_ID_07,
QPDMADM.LAR_OMEGA_TRANS_SUM.CUSTOMER_ID_14,
QPDMADM.LAR_OMEGA_TRANS_SUM.ISO_COUNTRY_CODE2,
QPDMADM.LAR_OMEGA_TRANS_SUM.ACCOUNT_TYPE_CODE,
QPDMADM.LAR_OMEGA_TRANS_SUM.END_USER_CUSTOMER_ID,
sum(QPDMADM.LAR_OMEGA_TRANS_SUM.NIA_AMT),
QPDMADM.LAR_OMEGA_TRANS_SUM.INDUSTRY_CLUSTER_CODE,
QPDMADM.LAR_OMEGA_TRANS_SUM.SOURCE_SYSTEM_ID,
QPDMADM.LAR_OMEGA_TRANS_SUM.LOAD_DATE
FROM
QPDMADM.LAR_OMEGA_TRANS_SUM
WHERE
(
QPDMADM.LAR_OMEGA_TRANS_SUM.FISCAL_PERIOD = '200712'
)
GROUP BY
QPDMADM.LAR_OMEGA_TRANS_SUM.SOURCE_TRANSACTION_ID,
QPDMADM.LAR_OMEGA_TRANS_SUM.ORDER_DATE,
QPDMADM.LAR_OMEGA_TRANS_SUM.SHIP_DATE,
QPDMADM.LAR_OMEGA_TRANS_SUM.FISCAL_PERIOD,
QPDMADM.LAR_OMEGA_TRANS_SUM.DISCOUNT_AGREEMENT_ID,
QPDMADM.LAR_OMEGA_TRANS_SUM.PRODUCT_ID_07,
QPDMADM.LAR_OMEGA_TRANS_SUM.CUSTOMER_ID_14,
QPDMADM.LAR_OMEGA_TRANS_SUM.ISO_COUNTRY_CODE2,
QPDMADM.LAR_OMEGA_TRANS_SUM.ACCOUNT_TYPE_CODE,
QPDMADM.LAR_OMEGA_TRANS_SUM.END_USER_CUSTOMER_ID,
QPDMADM.LAR_OMEGA_TRANS_SUM.INDUSTRY_CLUSTER_CODE,
QPDMADM.LAR_OMEGA_TRANS_SUM.SOURCE_SYSTEM_ID,
QPDMADM.LAR_OMEGA_TRANS_SUM.LOAD_DATE
Note:- FISCAL_PERIOD is index only
Thank & Regards,
Anil
Hi,
Can some one please send me the Sql Server 2005 Performance Tuning artilce links?
Thanks
I have a problem that is more complex than the one that follows, but if someone can answer this question,
I believe I can take it from there in solving my real problem.
Why does:
create table #bbb (c int)
set nocount on
declare @a int
select @a = 1
while (@a < 5000)
begin
select @a = @a + 1
insert into #bbb values (@a)
end
run in about 2 seconds, while:
create table bbb (c int)
set nocount on
declare @a int
select @a = 1
while (@a < 5000)
begin
select @a = @a + 1
insert into bbb values (@a)
end
runs in about 20 seconds? (The only difference is that one uses a temp. table.)
What could I have configured incorrectly to cause this behavior?
Thanks in advance!
Palmer
Hi !
What are some basic tips and hints for better performance running SQL 7.0 ?
Thanx
Anybody have a suggestion on text books or other materials that deal with performance tuning in SQL 7.0. From what I have seen SQL 7.0 is far diffrent than 6.5. I'm specificaly interestd in information about query plans, profiler and what a table spool does.
View 1 Replies View RelatedI have a query which retrieves data from 4-5 tables. To restrict the acess directly to the tables, views have been created on all these tables. These views are just select * from the tables. Two of these 5 tables have 700 Million and 8 Million rows respectively. And all the tables are having indexes. My issue here is that my query on views take three times more then the duration it takes to retrive data directly from tables. e.g. To retrieve 1 Miliion rows, it takes just 7-10 minutes on tables but on views it takes more than 30 minutes. When I check the query plan for both the options, I can see that indexes are being picked up but still the views are very slow.
Creating indexes on views is not feasible option for me as it requires DDL changes and so much testing efforts.