Hi,
currently i am working on performance tuning on some stored procedure and found that most of the stored procedure include with recompile on top of it.
i try to remove it and now it improve a lot on speed tuning. However, for those stored procedure which is using dynamic sql, is it a must to include recompile in our stored procedure?
How to recompile a stored procedure automatically in SQL server 6.5?
Thanks in advance
Stella
Does the SQL Server 6.5 system recompile all stored procedures automatically when the server is restarted?
Thanks.
Stella
Hey all,
We have a problem with one of our MS SQL 2000 databases and some stored procedures.
I'm not sure exactly what the problem is, but these are the symptons....
The stored procedure runs without problems for a period of time. Abruptly, without warning it begins to time out when called from our web application.
Calling it through the query analyzer it runs within a second.
Forcing the stored procedure to recompile allows the web application to start calling it again without it timing out.
We have a DTS package that runs over night and imports a number of records (not sure on the exact numbers, but definately enough to make a difference to indexes) so this could be part of the problem although when I force a recompile I do not do any update stats or anything else.
I wrote a test script to call the stored procedure when it was timing out to ensure it wasn't a web application problem and the procedure continued to time out until the forced recompile. So I don't think the problem is there.
The stored procedure returns multiple results sets and when it starts timing out it is while it is returning the second results sets.
The code for the second results set is...
Select avg(round(p.PricingValue, 5)) as Average, stdev(round(p.PricingValue, 5)) as StdDev, min(p.CaptureDate) as FromDate, max(p.CaptureDate) as ToDate
From Pricing p
Inner Join Security s
On p.SecurityID = s.SecurityID
Left Outer Join Issuer i
On s.IssuerID = i.IssuerID
WHERE p.PricingTypeID = @PricingType
And p.TenorTypeID = @TenorType
And p.CaptureDate Between @DateFrom And @DateTo
AND p.SecurityID IN ( SELECT SecurityId FROM UserResult ur WHERE ur.UserResultSelected = 1 AND ur.UserID = @userID )
Does anyone have any idea what might be going on here?
Regards
Shaun
Version 2008 R2
The stored procedure has the dependency on the table that was altered.
We have on demand snapshot replication set up between 2 servers. When the subscriber applies the snapshot, our stored procedures start executing very slowly. Updating statistics and rebuilding indexes does not resolve the problem, however; executing sp_recompile on the affected stored procedures does fix the problem. Is this a known issue with replication? Is there a better workaround than manually recompiling stored procedures after every snapshot?
View 3 Replies View RelatedIf my data structure never changes, just the data itself, is
there a need to use the "with recompil option" on stored
procedures? Isn't there a performance hit having it in
the stored procedure?
Thanks
I know that all the documentation always tells you that sp_recompile will force a stored procedure to recompile the next time it is executed. However, I am not seeing the recompiles in a SQL Trace, when capturing SP: Recompile events. I have tried this on many different database servers, using sp_recompile and also the WITH RECOMPILE option when creating the proc.
Can anyone explain this?
We are developing a production/management solution for the photo finishing sector. We need a performance of 1 order priced per second.
If we run the procedure once we dont have a dramatical performance loss due to recompilation of the stored procs.
If we have about 3 consecutive sessions we find the performance loss to be at a rate of about 200 - 500 %.
We can't afford this. On the site of msdn we found some reasons why sql server needs to recompile, but since the structure of our db can't be changed in such a manner that this would resolve the problem we need an alternative.
All help is greatly appriciated.
This is a solution for a very specific problem, and it's one that you'll hardly ever use, but it's important to know about that one scenario where it can save your neck. Ordinarily, stored procedures are only recompiled if they're no longer in the procedure cache. But if a stored procedure's execution plan is still in the cache, then SQL Server reuses the compiled storedprocedure and its existing execution plan. This is almost always the best course of action. Almost always, but not always.Sometimes, however, reusing an existing plan doesn't offer the most efficient performance. Imagine, for example, that your stored procedure accepts a parameter that determines the natureof a JOIN operation. The results can vary in a big way, so you wouldn't want your procedure to be locked into an execution plan that might be completely inappropriate for that JOIN. In a highlyspecialized case like this, you might want to force SQL Server to recompile the procedure every time the procedure runs. Doing so comes at a performance cost, but this might be offset by thesavings you gain in not executing the procedure with an awful compiled execution plan. Consider carefully whether to use this approach (or whether to re-engineer the over-design of yourapplication to avoid this situation in the first place). Should you need to instruct SQL Server to recompile each time, add the WITH RECOMPILE directive to the procedure, like this: CREATE PROCEDURE ProcName @Param int /* ... other parameters */ WITH RECOMPILE AS /* ... procedure code follows */
If we omit "WITH RECOMPILE", what will be the consequence? Thanks
Hi all - I'm trying to optimized my stored procedures to be a bit easier to maintain, and am sure this is possible, not am very unclear on the syntax to doing this correctly. For example, I have a simple stored procedure that takes a string as a parameter, and returns its resolved index that corresponds to a record in my database. ie
exec dbo.DeriveStatusID 'Created'
returns an int value as 1
(performed by "SELECT statusID FROM statusList WHERE statusName= 'Created')
but I also have a second stored procedure that needs to make reference to this procedure first, in order to resolve an id - ie:
exec dbo.AddProduct_Insert 'widget1'
which currently performs:SET @statusID = (SELECT statusID FROM statusList WHERE statusName='Created')INSERT INTO Products (productname, statusID) VALUES (''widget1', @statusID)
I want to simply the insert to perform (in one sproc):
SET @statusID = EXEC deriveStatusID ('Created')INSERT INTO Products (productname, statusID) VALUES (''widget1', @statusID)
This works fine if I call this stored procedure in code first, then pass it to the second stored procedure, but NOT if it is reference in the second stored procedure directly (I end up with an empty value for @statusID in this example).
My actual "Insert" stored procedures are far more complicated, but I am working towards lightening the business logic in my application ( it shouldn't have to pre-vet the data prior to executing a valid insert).
Hopefully this makes some sense - it doesn't seem right to me that this is impossible, and am fairly sure I'm just missing some simple syntax - can anyone assist?
Hi all,
I have 2 sets of sql code in my SQL Server Management Stidio Express (SSMSE):
(1) /////--spTopSixAnalytes.sql--///
USE ssmsExpressDB
GO
CREATE Procedure [dbo].[spTopSixAnalytes]
AS
SET ROWCOUNT 6
SELECT Labtests.Result AS TopSixAnalytes, LabTests.Unit, LabTests.AnalyteName
FROM LabTests
ORDER BY LabTests.Result DESC
GO
(2) /////--spTopSixAnalytesEXEC.sql--//////////////
USE ssmsExpressDB
GO
EXEC spTopSixAnalytes
GO
I executed them and got the following results in SSMSE:
TopSixAnalytes Unit AnalyteName
1 222.10 ug/Kg Acetone
2 220.30 ug/Kg Acetone
3 211.90 ug/Kg Acetone
4 140.30 ug/L Acetone
5 120.70 ug/L Acetone
6 90.70 ug/L Acetone
/////////////////////////////////////////////////////////////////////////////////////////////
Now, I try to use this Stored Procedure in my ADO.NET-VB 2005 Express programming:
//////////////////--spTopSixAnalytes.vb--///////////
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim sqlConnection As SqlConnection = New SqlConnection("Data Source = .SQLEXPRESS; Integrated Security = SSPI; Initial Catalog = ssmsExpressDB;")
Dim sqlDataAdapter As SqlDataAdapter = New SqlDataAdaptor("[spTopSixAnalytes]", sqlConnection)
sqlDataAdapter.SelectCommand.Command.Type = CommandType.StoredProcedure
'Pass the name of the DataSet through the overloaded contructor
'of the DataSet class.
Dim dataSet As DataSet ("ssmsExpressDB")
sqlConnection.Open()
sqlDataAdapter.Fill(DataSet)
sqlConnection.Close()
End Sub
End Class
///////////////////////////////////////////////////////////////////////////////////////////
I executed the above code and I got the following 4 errors:
Error #1: Type 'SqlConnection' is not defined (in Form1.vb)
Error #2: Type 'SqlDataAdapter' is not defined (in Form1.vb)
Error #3: Array bounds cannot appear in type specifiers (in Form1.vb)
Error #4: 'DataSet' is not a type and cannot be used as an expression (in Form1)
Please help and advise.
Thanks in advance,
Scott Chang
More Information for you to know:
I have the "ssmsExpressDB" database in the Database Expolorer of VB 2005 Express. But I do not know how to get the SqlConnection and the SqlDataAdapter into the Form1. I do not know how to get the Fill Method implemented properly.
I try to learn "Working with SELECT Statement in a Stored Procedure" for printing the 6 rows that are selected - they are not parameterized.
I am new to work on Sql server,
I have One Stored procedure Sp_Process1, it's returns no of columns dynamically.
Now the Question is i wanted to get the "Sp_Process1" procedure return data into Temporary table in another procedure or some thing.
I have some code that I need to run every quarter. I have many that are similar to this one so I wanted to input two parameters rather than searching and replacing the values. I have another stored procedure that's executed from this one that I will also parameter-ize. The problem I'm having is in embedding a parameter in the name of the called procedure (exec statement at the end of the code). I tried it as I'm showing and it errored. I tried googling but I couldn't find anything related to this. Maybe I just don't have the right keywords. what is the syntax?
CREATE PROCEDURE [dbo].[runDMQ3_2014LDLComplete]
@QQ_YYYY char(7),
@YYYYQQ char(8)
AS
begin
SET NOCOUNT ON;
select [provider group],provider, NPI, [01-Total Patients with DM], [02-Total DM Patients with LDL],
[Code] ....
I have a requirement to execute an Oracle procedure from within an SQL Server procedure and vice versa.
How do I do that? Articles, code samples, etc???
I have a sub that passes values from my form to my stored procedure. The stored procedure passes back an @@IDENTITY but I'm not sure how to grab that in my asp page and then pass that to my next called procedure from my aspx page. Here's where I'm stuck: Public Sub InsertOrder() Conn.Open() cmd = New SqlCommand("Add_NewOrder", Conn) cmd.CommandType = CommandType.StoredProcedure ' pass customer info to stored proc cmd.Parameters.Add("@FirstName", txtFName.Text) cmd.Parameters.Add("@LastName", txtLName.Text) cmd.Parameters.Add("@AddressLine1", txtStreet.Text) cmd.Parameters.Add("@CityID", dropdown_city.SelectedValue) cmd.Parameters.Add("@Zip", intZip.Text) cmd.Parameters.Add("@EmailPrefix", txtEmailPre.Text) cmd.Parameters.Add("@EmailSuffix", txtEmailSuf.Text) cmd.Parameters.Add("@PhoneAreaCode", txtPhoneArea.Text) cmd.Parameters.Add("@PhonePrefix", txtPhonePre.Text) cmd.Parameters.Add("@PhoneSuffix", txtPhoneSuf.Text) ' pass order info to stored proc cmd.Parameters.Add("@NumberOfPeopleID", dropdown_people.SelectedValue) cmd.Parameters.Add("@BeanOptionID", dropdown_beans.SelectedValue) cmd.Parameters.Add("@TortillaOptionID", dropdown_tortilla.SelectedValue) 'Session.Add("FirstName", txtFName.Text) cmd.ExecuteNonQuery() cmd = New SqlCommand("Add_EntreeItems", Conn) cmd.CommandType = CommandType.StoredProcedure cmd.Parameters.Add("@CateringOrderID", get identity from previous stored proc) <------------------------- Dim li As ListItem Dim p As SqlParameter = cmd.Parameters.Add("@EntreeID", Data.SqlDbType.VarChar) For Each li In chbxl_entrees.Items If li.Selected Then p.Value = li.Value cmd.ExecuteNonQuery() End If Next Conn.Close()I want to somehow grab the @CateringOrderID that was created as an end product of my first called stored procedure (Add_NewOrder) and pass that to my second stored procedure (Add_EntreeItems)
View 9 Replies View RelatedI have a stored procedure and in that I will be calling a stored procedure. Now, based on the parameter value I will get stored procedure name to be executed. how to execute dynamic sp in a stored rocedure
at present it is like EXECUTE usp_print_list_full @ID, @TNumber, @ErrMsg OUTPUT
I want to do like EXECUTE @SpName @ID, @TNumber, @ErrMsg OUTPUT
We have lots of stored procedures containing temporary tables. In SQL 6.5 every thing was great. But in 7.0, it's doing a lot of recompile while executing. Tried trace flag 8720, didn't work..
Basically I am talking abt this problem :
http://support.microsoft.com/support/kb/articles/Q224/5/87.ASP
Let me know if any ideas/Remedies ??? How did any of you tackled this behaviour.
I have a stored procedure that calls a msdb stored procedure internally. I granted the login execute rights on the outer sproc but it still vomits when it tries to execute the inner. Says I don't have the privileges, which makes sense.
How can I grant permissions to a login to execute msdb.dbo.sp_update_schedule()? Or is there a way I can impersonate the sysadmin user for the call by using Execute As sysadmin some how?
Thanks in advance
Has anyone encountered cases in which a proc executed by DTS has the following behavior:
1) underperforms the same proc when executed in DTS as opposed to SQL Server Managemet Studio
2) underperforms an ad-hoc version of the same query (UPDATE) executed in SQL Server Managemet Studio
What could explain this?
Obviously,
All three scenarios are executed against the same database and hit the exact same tables and indices.
Query plans show that one step, a Clustered Index Seek, consumes most of the resources (57%) and for that the estimated rows = 1 and actual rows is 10 of 1000's time higher. (~ 23000).
The DTS execution effectively never finishes even after many hours (10+)
The Stored procedure execution will finish in 6 minutes (executed after the update ad-hoc query)
The Update ad-hoc query will finish in 2 minutes
Hi,
What is equivalent to OPTION (RECOMPILE) in SQl Server 2000.
Create table #Employee
(
EmpId int IDENTITY,EmpName varchar(30)
)
insert into #Employee(EmpName )
select EmpName from AllEmployees
OPTION (RECOMPILE)
What exactly does WITH RECOMPILE do? I read that it will create a new plan. I guess the next question is, what is the purpose behind that?
Can someone explain to me?
Thanks
Does someone know whether it is better to drop and reload or sp_recompile a stored procedure to get a new, recompiled execution plan? I have another DBA telling me it is better to drop and reload the stored procedure rather than use sp_recompile. I would think that sp_recompile would be the preferred method.
View 1 Replies View RelatedIs there a way (command or stored procedure) to RECOMPILE or REFRESH a USER DEFINED FUNCTION? I can recompile SPs with sp_recompile and refresh views with sp_refreshView, but I could not find any way to refresh User-defined functions (some of them are like views, with parameters).
Environment: SQL 2005 SP2.
Thanks !
Hello:The installation details:W2K SP4, SQL Server 2000 Ent with 1GB RAM. It is a Bi-P3.When I run the Profiler to trace Stored Procedure performance, I get abunch of SP:CacheMiss for couple of stored procedure I invoke quiteoften in a web app.But I do not see SP:Recompile.Here are my questions:i) If the plan is not in the Cache, why am I not see SP: Recompile.Where else can it be tugged.ii) What are the other counters I need to monitor to see if I need morememory.Thanks in advance for any leads on this.Regards:
View 4 Replies View RelatedHi all,
I am trying to debug stored procedure using visual studio. I right click on connection and checked 'Allow SQL/CLR debugging' .. the store procedure is not local and is on sql server.
Whenever I tried to right click stored procedure and select step into store procedure> i get following error
"User 'Unknown user' could not execute stored procedure 'master.dbo.sp_enable_sql_debug' on SQL server XXXXX. Click Help for more information"
I am not sure what needs to be done on sql server side
We tried to search for sp_enable_sql_debug but I could not find this stored procedure under master.
Some web page I came accross says that "I must have an administratorial rights to debug" but I am not sure what does that mean?
Please advise..
Thank You
What's the performance hit for using 'WITH RECOMPILE' in a stored procedure? I'm not a serious DBA, nor do I pretend to be one, but I'm writing a sp_ to be used with both insert and updates. I'm using a variable that defines the operation (IF @operation = 'Update'...) which will be passed at run-time from ColdFusion. Do I need to use the 'WITH RECOMPILE' clause to keep the sp_ kosher with respect to the operation being performed? And what's the damage in resources?
Thanks,
John E.
Hi!I need to refresh an entire database.I can recompile SPs with sp_recompile (or DBCC FLUSHPROCINDB), andrefresh views with sp_refreshView, but I cannot find any way torefresh my user-defined functions (some of them are like views, withparameters).Any help appreciated :) !Ben
View 5 Replies View RelatedHi,I have a question in SQL Server 2K, I use SQL Profile to trace, andfind Stored Procedure was auto recompiled, like this row in thetrace:SP:Recompile151680762004-02-27 16:01:11.610How can I stop the auto recompile.ThanksHarold
View 7 Replies View RelatedHi ,
what would be correct way to recompile
all user objects ?
Developers working by using alter create and rename on udf and stored procedure, dependecicies window in EM does not repesent correct info.
If I want to see up to date all dependedcies of every user defined object in db
Thank you
Alex
Hi,
I increased one of my base tables column which is referenced in view
I noticed sql server didn't recognized this change and its still showing old field size in the view.
I can simply drop and create it again. But wanted to know if there is any way (command/sp) to recompile the view which will be easy to deploy in production as patch.
Thanks
- D
Hi,
I use recompile option in SQL query to dynamic pass variable to optimizer.
I verify explain plan with SET STATISTICS PROFILE ON
and optimizer chose nested lookup ,ok. But if use Display Estimated Execution Plan (CTR+L) I€™ve get merge join. It€™s very confusing, some suggestion €¦?
Use AdventureWorks
go
declare @StartOrderDate datetime
set @StartOrderDate = '20040731'
SELECT * FROM Sales.SalesOrderHeader h, Sales.SalesOrderDetail d
WHERE h.SalesOrderID = d.SalesOrderId
AND h.OrderDate >= @StartOrderDate
OPTION(RECOMPILE);
SQL2005SP2
djedgar
I have a stored procedure 'ChangeUser' in which there is a call to another stored procedure 'LogChange'. The transaction is started in 'ChangeUser'. and the last statement in the transaction is 'EXEC LogChange @p1, @p2'. My questions is if it would be correct to check in 'LogChange' the following about this transaction: 'IF @@trancount >0 BEGIN Rollback tran' END Else BEGIN Commit END.
Any help on this would be appreciated.