I have a stored procedure that takes less than 1 second in sql query analyzer to return my results.
I run this same SP in ASP.NET using a calendar control and using perf monitor I notice that for me from my dev machine my cpu utilization is sometimes over 40%.Is there any tweaks I can do to help decrease CPU utilization.
We have a production database that sits on a 4 proc server with 4 GB of memory and SAN disk storage via fiber. There are some stored procedures that run and they take approximately 10 minutes to run. A developer has SQL Server installed on his local pc that has 1 2.5 GHz processor and 2 GB of memory and the stored procedures run in approximately 2 minutes. I have updated statistics and rebuilt indexes to no avail. He is questioning why it runs so much faster on his smaller pc compared to the production environment. I have monitored CPU, Memory, and Disk Queue Length and none of these performance counters look concerning to me while the stored procedures are running.
Can anyone out there give me some input on what I could check to figure out why we are experiencing this performance difference?
Thanks,
Corey
We are new to SQL 2000, and would like to bounce a couple questions off some of you gurus out there.
We are using SQL Server 2000 to build a data repository to assist us in transitioning from our old flatfile legacy system to SAP. We are also looking to use the SQL Server 2000 repository to build a smallish Enterprise Data Warehouse on the same SQL 2000 platform.
Here is our problem:
We have SQL Server 2000 loaded on a little scrapper PC with 1.4GHZ single processor, 1GB of memory, and a single 40 GB IDE drive.
When we are initially loading any of our repository tables the process cruises along pretty well, even respective of trying to locate the record for update before doing an insert. But, if we do something as simple as selecting count(*) against the table that's loading, performance on the load goes to its knees.
We understand we're pretty much at the mercy of the hardware we have (that's the budget), but we'd like to get as much bang as we can out of what's there.
Our questions are:
1. Is there anything we can do with our server configuration (short of new hardware) that will help us?
2. Are there any recommendations as far as monitors to help us better tune this specific configuration?
Thanks in advance for any help.
Hi,
Somebody please help me with mostly asked question on Performance Tunning Section. I have my client interview schedule for this profile.
Thanks in advance.
-- Chetan
Hi all,
I have downloaded an evaluation copy of a SQL Server performance tool (a fancy version of the Profiler) called Speed Coefficient from Imceda. Pretty interesting so far, but some questions are forthcoming (and probably will continue to come as I drill down and learn more about performance thangs).
It tells me I have a recompilation that I did not expect, it says the reason is "object not found at compile time, deferred to run time", but doesn't do too well at specifically telling me which object it is complaining about (yeah, not REALLY a complaint, but perhaps more a "mention", but I digress...)
I thought originally it was, perhaps, an object that I had not referenced correctly, but as it turns out, it is, I believe, referring to a global temporary table one of my procs creates. Upon further reflection/introspection, it makes sense to me that this is the case, since it won't HAVE the temp table object to kick around until it is created at run time.
Does this make sense? If so, I guess this is one of those times where the tool just makes reference to a possible issue, but it's up to the user to understand what the underlying cause of the "mention" is, and to determine if it is "OK" to have the recompilation occur.
I 'inherited' a group of SQL Server server class machines. They aretrue server technology but the disk sub-systems are lacking. There isone hot-swap backplane that all the drives share (with one SCSIchannel) thusly even though there are three logical drives (composedfrom 6 to 8 hard drives), they all go through one channel. This iscreating a performance issue that is noticable and can be seen invarious performance counters that Microsoft recommended one shouldmonitor in terms of disk I/O. For a cheaper 'fix', I can add aseperate two drive bay (with its own SCSI channel) with mirroreddrives. I would then mostly likely place the transaction log files onthis new channel. Or I could place the indices filegroup files onthis new channel for DBs with mainly searching going on (not muchupdating). If I went this route I would be leaning towards thetransaction log move since the second method would require me movingDBs around quite a bit. Any input on this solution (besides spendingmore money)?What I would prefer to do is get a better server class machine or addan external drive bay solution (not a SAN). I would try to get threeor four SCSI channels in the new hardware to split the differentfile/filegroups out (i.e. transaction logs files, data filegroup,indices filegroup, etc.). My only concern here is: would this moreexpensive solution be worth the money? As far as replacing servers, Ihave only two kinds of experience...replacing somewhat underpoweredservers with slightly less underpowered servers and replacing overkillservers with even more overkill servers. In both cases, the disksub-systems were fairly equivalent from the old system to the new one.Will going the three/four channel route really get data moving along?We have one server in particular that hosts a database (one of many onit) for a web application that gets decent traffic (it is a privatelogin based system for internal use and external use by our clients'agents). Periodically throughout the day, there are 2-5 minute burstswhere performance slows to a crawl. I want to spend more timeprofiling queries and such before recommending we spend more money,but the folks I am working for want quick results and there is quite abit of stored procedure logic to profile and investigate. I know thedisk sub-system is definately in need of an overhaul, but I would liketo get an idea of peformance gains from adding either one additionalchannel over the existing single channel as well as going thethree/four channel route over the existing single channel setup.Any information would be greatly appreciated.Regards,Tony
View 2 Replies View RelatedHi there,
I have been hired for a couple of weeks to investigate the performance of a sql server 2000 system.
One of the things that strikes me is that all the Primary key (identity field) fileds uses an decimal(18,0) as it's datatype.
An decimal with a precision of 18,0 takes 9 bytes for each column, while an int takes only 4 bytes and and bigint 8 bytes.
Many tables aren't that big, so the values will fit in an int datatype.
1. Is iot a good option to change the decimals columns to an int column ?
2. Many of these columns are indexed by a clustered index. Can the decimal datatype be a performance issue ?
3. sometimes they have deadlocks due page splits. Can this by reduced by changing the data types, while more data fit's into an page?
Thanks in advance,
Greetz,
Patrick de Jong
Hello!
Is there an easy way to deal with this situation below when reading in data from a SQL Database:
int? myNullableColumn;myNullableColumn = Convert.ToInt32(datarow["datacolumn"]);
Where, ideally, 'myNullableColumn' would be 'null' if the value was 'DBNull.Value'. This does not work because Convert.ToInt32 will not convert 'DBNull.Value to null', but instead throws an error.
Is there a built in funtion that does do this?
Thanks!
Ok, I have a table with about 47000 records in it. I have the following query for that table:Select ReportType =
Case
When ReportType = 1 Then 'Uniquery Report'
When ReportType = 2 Then 'SABRE Report'
When ReportType = 3 Then 'Menu Report'
Else Null
End,
ReportNameTo_,
Frequency.Frequency as Frequency,
ReportDate,
ReportDescription
From Report
Inner Join Frequency on ( Report.ReportFrequency = Frequency.FID )
Where ( Active = 1 )
And ReportDate = ( Select Max ( ReportDate ) From Report Where ( Active = 1 ) )
And ReportID = ( Select Max ( ReportID ) From Report Where ( Active = 1 ) )
The idea is that i need to get only the last report based off of unique reportname. I added a computer column to the table to give me the ReportNameTo_, since my deliminator is the _. Now my issue is that I have 1 records showing (the last record added to the table), which is right for the query that is written, but wrong for what I want. I need to only return the last record for each unique ReportNameTo_. So as an example, my table has the following ID, ReportNameTo_, Date fields the data looks something like this:
1, 123_, 1/1/20082, 123_, 1/1/20083, 124_, 1/1/20084, 124_, 1/1/20085, 125_, 1/1/20086, 125_, 1/1/20087, 126_, 1/1/20088, 126_, 1/1/2008
I only want to return the following:
2, 123_, 1/1/20084, 124_, 1/1/20086, 125_, 1/1/20088, 126_, 1/1/2008
Hope someone out there can let me know how to do this... I am almost there, just not all the way.
Hello!
Just looking for advise on dealing with duplicates in database.
I have a contact table that have a bunch of duplicated customer records.
My goal is to combine all duplicated records into one record.
This involves couple tables:contact,contact history ,calendar.
All tables related by common column "accountno".
What would be the best approach for this?
Thank you,
Lena
I have the following query in a stored procedure. If there are no rows in the history file, it returns a null. If there some setting or function that would have it return a zero if no rows are found? I use the variable to do arithmetic later on and a null messes everything up.
select@MarketTotal = sum(isnull(MarketValue,0))
fromhistory
whereEmpUID = @EmpUID and
Shares > 0
Thanks,
Ken Nicholson
Hi i have the following :
select agent, name, surname, address, cust1_text01, cust1_text02, phone1,
case call_type_id
*when NULL then ''
else call_type_id
end as 'call_type_id'
from Record_T
* I have also tried when NULL then space(1)
yet the query still returns NULL when this field is empty ?
the idea is to always return data, even if the field is NULL to
replace it with an empty space or spaces.
Hello,
Question 1:
In my senario i've developed a system which utilizes 2 database, i've writen queries like db1.dbo.table1 join db2.dbo.table2 etc... Now that db2 is getting huge, client wants to shift it to another server.
I don't know how to modifiy my queries to cope with such situation. Could somebody plz tell me on how to you write queries involving two databases from different servers.
Question 2:
I'm maintaining second database (db2) to keep track of records of db1 which have been processed by my software, so that when db1 gets added with more records i can compare db2 table with db1 table to identify which records are new.
db1 is not my database and i don't have any control over that, (it's some erp db), is there any way of identifying which rows have been processed. Can the need for db2 be eliminated?
I'm using SQL Server 2005
Thank You,
Sandeep.
hi ive got a inert sub where i grab values from text boxes etxthe values are passed to a stored procedure however , one of these fields is a date field , but the field is not required ...so on this line if the date text box is left blank i get an error , not a valid date .Parameters.Add("@actiondate", SqlDbType.DateTime).Value = txtActionDate.Texti have tried ( the actiondate field can take nulls ..)if txtActionDate="" then .Parameters.Add("@actiondate", SqlDbType.DateTime).Value = nothing else.Parameters.Add("@actiondate", SqlDbType.DateTime).Value = txtActionDate.Textend if but this doesnt workwhat is the best way of allowing blank values to be passed to the stored procedure( it doesnt fall over with normal text / varchar fields ) thanks
View 1 Replies View RelatedI am trying to make a stored procedure in SQLServer Express.The question is related to this stored procedure / transact - sql. I think i am doing something wrong with datetime.Here is the stored procedure.The error i am getting is that:Msg 241, Level 16, State 1, Line 20Syntax error converting datetime from character string. ===================================== DECLARE @websiteID intDECLARE @dateFrom datetimeDECLARE @dateTo datetimeDECLARE @sortbystring varchar (20)set @websiteID = 1set @dateFrom = Convert(datetime, '2007-02-07 12:01:00')set @dateTo = Convert(datetime, '2007-03-07 11:59:00')set @sortbystring = 'Campaign'IF ISNULL(@dateTo, '') = ''begin SET @dateTo = @dateFromendSET @dateTo = DATEADD(d, 1, @dateTo)DECLARE @str CHAR(400)LINE 20: SET @str = 'SELECT dateEntry, c.name as Campaign, e.firstname as FirstName FROM entry e, campaign c WHERE e.campaignID = c.id ' + 'AND c.websiteID = @websiteID' + 'AND (ISNULL(' + @dateFrom + ', '''') = '''' OR e.dateEntry BETWEEN '' + @dateFrom + '' AND '' + @dateTo + '') ' + 'AND e.IP NOT IN (SELECT IP FROM IP) ' + ' ORDER BY dateEntry DESC'print (@str)===============================================
View 9 Replies View RelatedI'm looking for opinions here:
I have a stored procedure that has one required variable, and two optional variables, like this:
CREATE PROCEDURE sp_tariff_rule
@tariff_id INT,
@start_date DATETIME = NULL,
@end_date DATETIME = NULL
...etc...
I want the procedure to process
1) all data is no dates are presented
2) all data after the start date, if no end date is supplied
3) all data before the end date if no start date is supplied
4) all data between the start and end dates if both are supplied
Now, instead of an elaborate conditional, I added this to the WHERE clause of my SQL statement:
AND ((@start_date IS NULL OR service_date >= @start_date) AND (@end_date IS NULL OR service_date <= @end_date))
It works fine, but I want to know if anyone has a different/better way of doing it, or if there is a big bug waiting to happen here.
I typically don't like to create multipurpose routines in my code, but this is a better approach for my in a non-object-oriented world of SQL.
In SS 2000 it seems that there is no variable data type that can hold more than 8000 characters (varchar) or 4000 unicode characters (nvarchar). I've seen posts where multiple variables are spliced together to extend this limit. I am looking at performing string manipulations in an sproc and I need to be able to deal with the full 2GB/1GB limit of text and ntext field types. Is this possible? How do you deal with that?
View 14 Replies View RelatedHello all. Got bit of a long winded question here...........so here we go lol.
OK.......ive got data on an Excel spreadsheet. Ive set the spreadsheet up as a linked server and i'm creating a set of insert statements from it by using the following code:
SELECT 'INSERT INTO TRAINREC (COURSE_NAME) VALUES ('''+
EMPLOY_REF + ''', '''+
FROM AtriumDD...['Employee Training Records$']
For most records this generates a correct insert statement.........for example:
INSERT INTO TRAINREC (EMPLOY_REF, COURSE_NAME) VALUES ('153', 'NMA Panel');
However.........my problems start when the value for course name is containes an ' character. If it does the insert statement generated is incorrect. For example:
INSERT INTO TRAINREC (EMPLOY_REF, COURSE_NAME) VALUES ('139', 'Annual Accounting in Lloyd's Market');
can anyone suggest any ideas on how to get round this? Also if i havent explained it clearly enough just let me know and i can try and expand on it.
Thanks for reading.
I have a stored procedure as a recordsource from a contacts table. Inthis example, users can enter parameters to limit contacts by firstletter of last name or company name or keywords:Example:@myName nvarchar(30) = null,@Alpha char(1) = nullSELECTContacts.ContactID, ContactType,CASE WHEN Contacts.ContactType = 0THEN Contacts.CompanyNameELSEisNull(Contacts.LastName,'?') + ', ' +isNull(Contacts.FirstName,'?')ENDAS CNAMEFROMContactsWHERE(Keywords Like '%' + @myKeyword + '%' OR @myKeyword is Null)So far, so good, but...The problem is I want to also give the user the option of filteringalphabetically by first letter. I can't figure out how to deal withnulls in this example (user doesn't enter anything as parameter@Alpha):AND(@Alpha = CASE ContactType WHEN 0 THEN Left(LastName,1) ENDOR@Alpha = CASE ContactType WHEN 1 THEN Left(CompanyName,1) END)Any help is appreciated,LQ
View 2 Replies View RelatedHi,
I just realized something. In the old DTS package I am migrating, there is an ActiveX script that checks for a certain condition in a row. If the condition is true, then it does:
DTSTransformationStat_SkipRow
I just can't believe there isn't an equivalent functionality in SSIS.
However, so far, I have tried the following:
1.) Redirect file error output (on all columns in the file)
2.) Use a conditional transform to search for a text string in a column (the "bad" row has different text in it)
And still, I keep getting errors that there is an "impartial row" in the file. Yes, I know that - why doesn't the error redirection catch this? Why doesn't the conditional expression catch it either?
Am I missing something here? Is it just buggy? I find it hard to believe I have to work around something that worked just fine in DTS.
Thanks
What methods work for storing empty dates? I've read that some people pick an old date and use it to represent empty. I'm not fond of the idea, because then I'll have to strip that date whenever I display the field in my UI.
Any other ways to do this? I'm using SQL Server 2005 and C#.
Thanks!
hi,
I'm building a C# database application that access a remote sql 2005 database. For the moment I am using sql express edition. My application will be running in several REMOTE camps which only have an internet connection via sattelite. The sattelite connection has a very high latency. I am wondering what workarounds or solutions are available for this situation. All applications need to access the same database and preferebly be notified when changes take place on the database.
Thanks in advance.
Hi EveryoneVery new to .net and currently dipping my toes in the water with a small application, but getting to the point -
I have a form which has somel text fields that expect a date but which are not a required field so in other words the user can leave them blank.
The code behind page stores the information using a stored procedure which I add parameters to in the following fashion -
SqlParameter userdate = new SqlParameter();userdate .ParameterName = "@dtdate";userdate .SqlDbType = SqlDbType.DateTime;userdate .Direction = ParameterDirection.Input;userdate .Value = dtdate.Text.ToString();cmd.Parameters.Add(userdate);
Now if I leave the text field dtdate blank I receive an error because the above expects a date.
If I remove the line userdate .SqlDbType = SqlDbType.DateTime; I don't recieve an error but my stored procedure saves the date as 01/01/1900 or similar.
I believe this is because in my stored procedure the paramger dtdate is defined as @dtdate datetime
Obviously I want to have it so that if the user leaves the text field empty then no date is saved in the database and was wondering how other people tackle this scenario.
Hello,
I have a question, i loaded 2 files into SQL and the files have some cells that have the same model number.
how can I merge the cells together that have the same model number and (if possible take the avarage of their cell called price)
(and combine their other cell called stock)
and make it into one cell.
Any help would be very very apriciated. Thank you.
i tryed this but it does not work
SELECT Model_number FROM Products
Join Where Model_number='3CM3C1670800B'
I have also Tryed this, IT SHOULD work but I have an error someWhere:
delete from Productsfrom part_number a join
(select part_number, max(part_number) from part_number group by part_number having count(*) > 1) b
on a.part_number = b.part_number and part_number < b.part_number
I am using SQL Server to return a XML result set. I then perform a XSLT transformation on the returned result set to fill in HTML form text and select elements. The data returned includes the & character. This character correctly transforms, however I believe that the & is negatively impacting my form post (one of the form elements disappears from the posted data). How can I get around this?
View 1 Replies View RelatedHi
post a sample code
create table testNull(
a int not Null,
b varchar(5),
c varchar(5) )
insert into testNull (a,b,c) values(1,'Alex','test')
insert into testNull (a,b) values(2,'Alex2')
1. select * from testNull
-- return 2 rows
2. select * from testNull
where
a <> 3
and
b <> 'C1'
and
c <>'C2'
-- return ONLY 1 ROW !!!
3. select * from testNull
where
a <> 3
and
b <> 'C1'
and
isNull(c,'') <>'C2'
query 2 will retun only 1 row, because value of column c is Null
Question
Is any setting could be changed on db or server level to prevent errors with missing row in 2-nd query , or I have use isNull operator for every column acepting Null as value ?
Hi,
I have a problem with dealing with result sets returned from stored procedures.
I have a procedure like:
CREATE PROCEDURE SampleProcedure
AS
BEGIN
SELECT * FROM SampleTable
END
GO
By executing this stored porocedure is returned result set containing data from SampleTable table. (EXECUTE SampleProcedure)
The returned resultset can be seen in Query Analyzer and can be handled from ADO.NET without any hesitate.
But I can't use this result set from other stored procedure. I tried:
SELECT * FROM (EXEC SampleProcedure)
But there is sintax error in select statement.
Does anybody know, how to store the result set into a teporary table or select it by SELECT statement?
Thanks.
MarF.
If I subtract 14 days from a datetime field, will the time of day that I run this query affect the resultset? I am running the query during "normal business hours", 8 am - 5 pm, and the records are entered during this time frame as well.
ddave
I have run into a problem when searching for a Movie title that is a number (like the movie name 21)
This is an access database and the Movie_Name is a text field
The SQL I am using is
Select * from Movie_Data where Movie_Title = ‘” & Movie_Name & “’”
This works perfectly for everything except when the Movie_Name = a number
Is there a way to make this search work with both characters and numbers?
Hi there,
I am getting a headache trying to research what to do when you have a large number of parameters to include in a query. For example, if I have a large number of checkboxes for the user to pick criteria for a report and they select several, I'm assuming it would be bad practise to say:
WHERE Field = "a" OR Field = "b" OR Field = "c" OR Field = "d" OR Field = "e" OR.....etc etc etc
Is there a good solution for this, given that the number of parameters may vary dramatically depending on what the user selects to include in a report?!
I'm running SQL Server 2000 with an ASP front end.
Any help would be greatly appreciated!
Thanks in advance!
Matt
Hello,Suppose I have the following table...name employeeId email--------------------------------------------Tom 12345 Join Bytes!Hary 54321Hary 54321 Join Bytes!I only want unique employeeIds return. If I use Distinct it will stillreturn all of the above as the email is different/missing. Is there away to query in SQL so that only distinct employeeId is returned? noduplicates.I wouuld like to say WHERE no blank fields are present to get theright row to return.Many thanksYas
View 6 Replies View RelatedWe are looking to store a large amount of user data that will bechanged and accessed daily by a large number of people. We expectaround 6-8 million subscribers to our service with each record beingapproximately 2000-2500 bytes. The system needs to be running 24/7and therefore cannot be shut down. What is the best way to implementthis? We were thinking of setting up a cluster of servers to hold theinformation and another cluster to backup the information. Is thispractical?Also, what software is available out there that can distribute querycalls across different servers and to manage large amounts of queryrequests?Thank you in advance.Ben
View 10 Replies View RelatedThought I would share this since it caused me so much grief.
In some mainframe systems, some dates are stored as the string "00000000". In my SSIS package, I was trying to anticipate for this string, as well as any other combination of zeros (e.g., "000", "0000", etc), since I had already seen lots of dirty data in the flat file (like non-printing characters, etc).
So, what I tried to do was perform an integer conversion on the string and test if it was the equivalent of the numerical value zero:
Code Snippet
(DT_STR)[ColumnName] == 0 ? ....
Now, for some reason, that doesn't work, even though a similar operation in SQL does work:
Code Snippet
SELECT TOP 1 ISNUMERIC('00000000') FROM tableName
In the end, I had to resort to testing for a match on the literal string "00000000" and hope that no other dates came in as "000" or other variation. Fortunately, this has been true so far.
However, the moral of the story is, converting a series of zeros into a numeric zero, and testing against that, does not seem to work. I don't have a good explanation for why that is, but I would guess it has something to do with the limitation of the conversion function.
Happy integrating.