Hi,
I have a question in SQL Server 2K, I use SQL Profile to trace, and
find Stored Procedure was auto recompiled, like this row in the
trace:
SP:Recompile151680762004-02-27 16:01:11.610
How can I stop the auto recompile.
Thanks
Harold
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?
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
Version 2008 R2
The stored procedure has the dependency on the table that was altered.
Since upgrading from SQL Server Management Studio 2008 R2, I've noticed that it no longer autosaves queries that have not been manually saved first. If a file has been manually saved the autorecover files end up in the following directory:
%appdata%MicrosoftSQL Server Management Studio11.0AutoRecoverDatSolution1
However, I have ended up in the situation where I have unsaved queries when my computer has crashed and have not been able to recover them.
I have also found references to .sql files stored in temp files in the following directory, but the files here seem to be very haphazardly caught:
%userprofile%AppDataLocalTemp
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.
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 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
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.
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
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?
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 RelatedI have an MS SQL Server table with a Job Number field I need this field to start at a certain number then auto increment from there. Is there a way to do this programatically or within MSDE?
Thanks, Justin.
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.
Hi ,
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
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
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 need a way to programmatically (via JDBC) find out which triggers for a table may not compile properly, so that I can disable the bad triggers.
I can do this fine in Oracle but cannot figure out if there's a way to do this in SqlServer. (In Oracle I'd just "alter trigger... compile" and select from user_errors.)
I know how to find the triggers that exist on a table, and I know how to enable/disable individual triggers. I know about sp_recompile, but all that does is flag the trigger for recompile at the next execution.
I need to verify whether the trigger is valid without having to actually invoke it. For example, if there's a bad Update trigger, I don't want to actually execute an update on the table.
One example of what I'm dealing with is this... We have Table A and Table B. There is an update trigger on Table B that references column A.col1. Then we alter Table A to drop col1. Later we have to update Table B. At this point the update will fail because of the bad trigger. I want to find and disable the trigger before executing the update on Table B. If there are other triggers on Table B that are valid, I want to leave them alone.
If I have a view such as: SELECT T.* FROM T
When I add a column to table T the view is not updated to reflect that change.
Furthermore, if there are other columns after the * in the view (for example SELECT T.*, GETDATE() as "My Date" FROM T) the last columns will contain incorrect data.
Is there a work around for this? An "auto-recompile when tables are modified" kind of option?
Thanks
Nick
PS: This is the script I used for testing:
create table tt (
test1 int primary key,
test2 int)
go
insert into tt (test1, test2) values (1,2)
go
create view vw_tt as select *, getdate() as "My Date" from tt
go
select * from vw_tt
go
create view vw_tt2 as select * from tt
go
alter table tt add test3 int
go
select * from vw_tt
select * from vw_tt2
select * from tt
drop table tt
drop view vw_tt
drop view vw_tt2
I can't seem to place the "option (recompile)" in any valid position so that the following procedure executes without a syntax error .
USE [PO]
GO
/****** Object: StoredProcedure [dbo].[npSSUserLoad] Script Date: 4/18/2015 3:57:38 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
[Code] ...
-- Generated code - DO NOT MODIFY
-- From Object Schema: 'C:XXXXXX.NetPOPOModel\_ObjectSchema
-- To regenerate this procedure use the 'Open With' option on file _ObjectSchema and select POCodeGen.exe
Declare @SqlCmd nvarchar(max)
Declare @ParamDefinitions nvarchar(1024)
Set @ParamDefinitions = N'@UserId int,NTUser varchar(30), @XmlResult XML OUTPUT'
Set @SqlCmd = N'Set @XmlResult =
(
Select
[UserId] [a],
[UserName] [b],
[code]....
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 RelatedAll:
I've implemented a variation of the Custom Logging provided in this post by Jamie Thomson.
http://blogs.conchango.com/jamiethomson/archive/2005/06/11/SSIS_3A00_-Custom-Logging-Using-Event-Handlers.aspx
Everything seems to work well on my desktop during development, but when I deployed the packages to our DEV environment the packages still execute, but I'm now receiving warning messages in the sysdtslog90 log table...
Precompiled script failed to load. Attempting to recompile. For more information, see the Microsoft Knowledge Base article, KB931846 (http://go.microsoft.com/fwlink/?LinkId=81885).
My log table (SSISLog) looks OK, with only OnPostExecute messages that include the package / task information and rowcounts.
The KB article suggests upgrading to SP2, but I'm well past SP2, using Build 3159 on both machines.
Any suggestions on how to get rid of the warnings?
Thanks!
Leda
Howdy;
I've tried this in the 'tools' area, but that didn't work too well. I suspect, I will have to generate a T-SQL code then schedule it as a job. Why I can't just drag and drop with basic desires, is beyond me, but THAT probably does exist.
anyway here is the problem
[this server has many databases, on SQL 2000 sp2]
1. User only wants me to use Monday morning's full backup, which is good in that it doesn't include transaction logs.
2. Restore that data overtop/into Developement db. = good, no data to worry about damaging.
3. User does NOT want me to do this by hand, but schedule it.
ok,
a. must do a RESTORE WITH FILELISTONLY from [?] what ?, master? and if I user the *.bak of the production, it has
a coded date field in the name entry SO, I would, I guess, have to generate all sorts of wonderful code to find the date and build a file name. Why, because using the FROM DISK = 'F:MSSQLBACKUPDBPRODUCTION_yyyyddmm.BAK' is not going to work with a wild card.
Can I do a file lookup using a 'PRODUCTION' prefix into a variable, then use that or should I look for latest file date [remember there are several database backups here], or ????
then. How does one schedule such a T-SQL. Do I save it to some text file, and invoke it using a job scheduler.
any help appreciated.
IS there an easier way.
rik
In our application we use the ADODB.Recordset.
In SQL server 2000
If there was a view that joined 2 tables and I accessed the view the 2 ID fields in the view would still have the AutoIncrement attribute still set to true so that I knew those were Identity fields.
In SQL server 2005
I dont' know why but if you reference a View that has Identiy AutoInc fields in ADO it doesn't keep those properties.
Also for whatever reason we Set the ID field to 0 to let ourselves know its a new Record. SQL 2000 let it happen and assumed it to be null where as By Setting the ID to 0 in SQL 2005 causes it to blow up on me.
Is there some sort of setting in SQL that can make SQL 2005 work like SQL 2000 in these two instances...
how can I configure the SQL server to automatically restart selected services on a regular basis?
View 1 Replies View RelatedHello,
I'm working on some maintenance task. I need some O/S system to start my SQL Service when it found stopped due to error or els any reason. I mean, when due to error if they fail, they have to start automatically by O/S.
regard's,
vnk.
I have a table that consists of an invoice number, the ordering user's customer number, and current shipping status of the invoice.
What I would like is for the invoice number to auto increment whenever I insert into the table. I'm using SQL Server, but I can't find something to check (or whatever) in Enterprise Manager.
I'm certain it's possible, I just have no idea how. Please help!
Cheers,
RobJ.