Delays Processing Queries
Dec 28, 2001
I've noticed lately that my queries through ADO/VB are taking alot longer to process at certain times. The query and the result information never changes, only that at certain times the query takes alot longer than usual. I thought that I possibly need more licenses, or it might be network traffic. I currently use MS SQL Server 2000 small business Ed(5 Cals).
Has anyone any information about performance problems due to licensing issues?
Thanks,
Dave Cohoon
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May 23, 2007
I have a 13 GB MYSQL table with the following definition:
Code:
CREATE TABLE `WikiParagraphs` (
`ID` int(10) unsigned NOT NULL auto_increment,
`Paragraph` text NOT NULL,
PRIMARY KEY (`ID`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=73035281 ;
I query it like this:
Code:
select Paragraph from WikiParagraphs where ID in (1,2,3,4)
the 1,2,3,4 bit comes from the Sphinx FullText engine that gives me the IDs I need that match my query within about 500 milliseconds.
But retrieving the data itself takes approximately 3-6 seconds.
Obviously, I'd like to speed this query up.
Any ideas?
G-Man
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Jul 11, 2006
I have three columns in my table,'StartDate',EndDate','BatchID'
When I upadate the the table for 'EndDate' I want to calculate the
I want to store this modified value somewhere and calculate the difference in (Value of 'End Date' Before update)-(Value of 'EndDate' after Update')
How it is possible?
Thanks in advance
Swati
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Feb 23, 2008
Hi,
We have been having performance issues with a high use webservice that is making ado calls.
Using past logs, I narrowed down the bottlenecks to delays that always appear to occur around some ADO call.
When I reproduce the same stored procedure calls in Query Analyzer I get a fast response.
I checked and made sure that the sqlConnection is being closed after use.
I feel like I've hit a brick wall. What could be causing these sporadic delays to calls to SQL Server?
Any advice is greatly appreciated.
Thanks,
J.
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Jan 15, 2008
Create a linked server to another box.
exec sp_serveroption 'RemoteServer', 'connect timeout', '1'
exec sp_serveroption 'RemoteServer', 'query timeout', '1'
Pull the network cable from the remote box.
SELECT * from RemoteServer.Database.dbo.Table1
Why does it take almost exactly 21 seconds, every time, before it fails?
How can I get it to fail immediately?
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Nov 10, 2003
A fellow developer of mine has created a ASP.Net application that executes some fairly complex stored procedures. This application is for all intensive purposes a queue and 3 or 4 people work on processing items in a FIFO type environment. There is logic in the Stored procedures to make sure each worker get a unique entry using a series of query hints.
Well what we are seeing is if these works are moving at a rapid pace and we execute an sp_who2 on the sql server there are entries that that seems to be hanging there and REMAINING there even after a browser is closed or the disposed method has been called on the connection object. Has anyone else experienced something similar to this with an ASP.Net application used by mutiple people?
My inclination is to blame the design of the application, but before I do that and step on my co-workers toes I thought I would throw this out to the group.
Thanks in advance for your input.
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Oct 27, 2006
hi everyone,
A couple of issues.
1)I usually connect to my remote server via TS using a specific login (it belong to Admins) and through that user I open my SSIS projects (30 packages). Now, I have a new user and the same operation take a long time and I don't know why (same permissions) the reasons for this big delay.
2)When I'm gonna to press "Delete all Breakpoints" from Debug menu BIDS is closed. Previously appears a Microsoft dialog (Microsoft has encountered an error...) asking if you inform or not of these errors.
Thanks in advance and regards,
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Jul 20, 2005
HelloWhen I use a PreparedStatement (in jdbc) with the following query:SELECT store_groups_idFROM store_groupsWHERE store_groups_id IS NOT NULLAND type = ?ORDER BY group_nameIt takes a significantly longer time to run (the time it takes forexecuteQuery() to return ) than if I useSELECT store_groups_idFROM store_groupsWHERE store_groups_id IS NOT NULLAND type = 'M'ORDER BY group_nameAfter tracing the problem down, it appears that this is not preciselya java issue, but rather has to do with the underlying cost of runningparameterized queries.When I open up MS Enterprise Manager and type the same query in - italso takes far longer for the parameterized query to run when I usethe version of the query with bind (?) parameters.This only happens when the table in question is large - I am seeingthis behaviour for a table with > 1,000,000 records. It doesn't makesense to me why a parameterized query would run SLOWER than acompletely ad-hoc query when it is supposed to be more efficient.Furthermore, if one were to say that the reason for this behaviour isthat the query is first getting compliled and then the parameters aregetting sent over - thus resulting in a longer percieved executiontime - I would respond that if this were the case then A) it shouldn'tbe any different if it were run against a large or small table B) thisperformance hit should only be experienced the first time that thequery is run C) the performance hit should only be 2x the time for thenon-parameterized query takes to run - the difference in response timeis more like 4-10 times the time it takes for the non parameterizedversion to run!!!Is this a sql-server specific problem or something that would pertainto other databases as well? I there something about the coorect use ofbind parameters that I overall don't understand?If I can provide some hints in Java then this would be great..otherwise, do I need to turn/off certain settings on the databaseitself?If nothing else works, I will have to either find or write a wrapperaround the Statement object that acts like a prepared statement but inreality sends regular Statement objects to the JDBC driver. I wouldthen put some inteligence in the database layer for deciding whetherto use this special -hack- object or a regular prepared statementdepending on the expected overhead. (Obviously this logic would onlybe written in once place.. etc.. IoC.. ) HOWEVER, I would desperatelywant to avoid doing this.Please help :)
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Aug 3, 2001
I have a DTS that imports data from an orcle database into SQL Server.
Doesn't the processing mostly occur on the SQL Server, not on the
oracle database from which the data is being imported?
The oracle database is vendor provieded and they are saying
our SQL Server DTS package is killing their server.
Any insight is appreciated.
Thanks
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Mar 27, 2008
Hey All,
I've got a process that creates records in my database based on XML input that I've gotten. What I am doing it giving this XML to a stored procedure to handle a specific task, then modify the XML and send it to the next stored procedure.
For instance, the XML could hold header records with detail records, I would first send the XML to a stored procedure that creates the header records, then updates the XML so the XML now knows the identity values of the header records I have just created, and then send the XML to the next stored procedure to create the details for those headers.
All works great and fine, but I have a problem with writing the identity values back to the XML. It seems I can only change one item in the XML at a time and thus need to loop this. For many records this really takes a long time.
Here is some sample code of what I'm doing (please excuse any typos, this is a simplified version of the code) :
declare @lvSeq numeric(15)
declare @lvRowNo int
declare @lvNumRows int
insert into myHeaderTable (
recid, recdesc
) select
ref.value('@recid', 'nvarchar(25)') recid,
ref.value('@recdesc', 'nvarchar(250)') recdesc
from @pXML.nodes('//headers/header') R(ref)
select @lvRowNo=1, @lvNumRows = @pXML.value('count(//headers/header)', 'int')
while (@lvRowNo<=@lvNnumRows) begin
select @lvSeq = recseq
from myHeaderTable
where recid = @pXML.value('//headers/header[position()=sql:variable("@lvRowNo")]/@recid)
set @pXML.modify('replace value of (//headers/header[position()=sql:variable("@lvRowNo")]/@recseq with sql:variable("@lvSeq")')
select @lvRowNo=@lvRowNo+1
end
Obviously I am looking for a better way to update the XML with the sequences. The insert takes a second, the loop takes minutes with large XML sets. I guess MSSQL is searching the whole XML to find the item to update.
It would be nice if I didn't have to loop through the XML. One solution I was thinking off is to store the XML in a temporary table with a single record per header item. Then I could do the modify in one go and recreate the XML by simply selecting the contents of the temporary tabel. I have no idea if this is possible.
So something like this:
select
ref.value('@recid','nvarchar(25)') recid,
ref.value('.','XML') XMLData -- this gives an error
into #TMP_XML
from @pXML.nodes('//headers/header') R(ref)
insert into myHeaderTable (
recid, recdesc
) select
recid,
ref.value('@recdesc', 'nvarchar(250)') recdesc
from #TMP_XML CROSS APPLY XMLData.nodes('/header') R(ref)
update #TMP_XML
set XMLData.modify('replace ....')
from myheadertable
where #TMP_XML.recid = myheadertable.recid
-- recreate XML here, not sure how....
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Sep 1, 1998
Is it possible to read a mail message,
store its msgtext in a variable,
decrypt the retreived string,
and execute the string.(wich is a sql statement)
If it is possible wich directions should I take
to implement the above.
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Jun 15, 2005
Hello friends,
I needed a suggestion, I am currently working on a reporting website that generates reports and i need to store all the reports in the database.
I usually go by row wise processing as it can be easily controlled but the problem is there will be a lot of reports, that is an estimation of 30,000 rows in a month and i m not sure if sql server can hold more than 2 billion rows per table.
Please Help!!
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Mar 1, 2006
Hi…all
I will just explain whole scenario what I m facing in tricky problem..
We have xml files coming at regular interval by some other source into sql server 2000…daily having records near @10000 to 70000…we have job scheduled to run it regular interval…we doing this by some filter criteria… suppose the flow is like staging table into secondary table and then final into primary table….
We design DTS package accordingly means take the records from staging table put into secondary table and then into primary table…(near @ 8 task involved in it…)
Suppose xml file came at 8:30 am and our DTS package will run at 9:00 am…and then 11:00 am and the 1:00 pm like that….what I observing from many days is that after running job at 9:00 am successfully some good data still pending in secondary table not processed into primary table. But when again job ran at 11:00 am it processed that pending good records into primary table…some times when I ran this job manually through DTS design level the good data that pending in secondary table processed!!!
My question is that why this job not processed all the good records in single shot????
T.I.A
Papillon
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Dec 30, 2005
Hello everyone. I need help regarding the following:Given the following table:CREATE TABLE T1 (C1 nvarchar(10), C2 money)INSERT INTO T1 VALUES ('A',1)INSERT INTO T1 VALUES ('B',2)INSERT INTO T1 VALUES ('C',3)let's say that i have this table in a local server and i want to uploadit to a remote server and in the remote server upload it to a databasethat contains the same table.the uploading part can be done by another application in the remoteserver, but i want i need is a way to transfer the data at the fastestpossible way.what steps do i need to follow?tia,Rey Guerrero
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Sep 20, 2007
Which component should be used to process dataset as a whole, and not on per row basis? I have need to process dataset conditionally (condition based on dataset), e.g. if a special row is present in dataset than dataset should be processed in a special way. Should I maybe use one Script Transformation to determine if dataset satisfies condition (and store that result into a variable), and then based on that condition (variable value) perform or not processing (using Conditional Split and Script Transformation)?
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Feb 28, 2007
Hello all,
I am having trouble trying to construct the following process in SSIS/SQL
2005:
1. Grab a set of unprocessed rows (ProcessDT = null) in an 'Action' table
2. For each of these rows, execute multiple stored procedures base on the
action type
If actiontype = 1, exec spAct1a @param1, @parm2
exec spAct1b @param1, @parm2, @param3, @param4
If actiontype = 2, exec spAct2a @param1, @parm2, @param3
exec spAct2b @param1, @parm2, @param3
etc....
3. Update ProcessDT so it's not processed again
4. Repeat until all rows are processed
Note - all sp params are contained in additional columns in the Action
table. Basically the Action table is a store for post-event processing of
sorts
but is order dependent, hence the row by row processing. And some of my
servers are 2000 so Service Broker is not an option (yet).
I first attempted to do this totally within the control flow - using an ado
recordset/foreach loop control, but I could not figure out how to run
conditional
process paths based on the ActionTypeID. I then tried to do this within the
dataflow using on OLEDB data source, a conditional split, and an oledb
command control
which almost got me there - the problem being for each row I need to execute
multiple sp's and it appears as if the oledb command only gives me one sp.
Any help would be appreciated!
Thanks in advance!
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Jul 11, 2007
I'm populating a new table based on information in an existing table. The new table is a list of all "items" and contains a primary key. The old table is a database of receipts where items can appear many times in any order.
I have put together the off-the-shelf components to do this, using a lookup transformation to see if the item is already in the new table. Problem is, because there's so much repetition in the old table I need to process the old table one row at a time. Batch processing is generating errors because the lookup doesn't detect duplicates within the buffer.
I tried setting the "DefaultBufferMaxRows" property of the task to 1, but that doesn't seem to have any effect.
To get the data from the old table, I'm using an OLE DB source. To get the data into the new table, I'm using the OLE DB Command transformation with parameters to execute an INSERT statement.
This is a job I have to do exactly once, so I don't care if I have to run it overnight. I'd rather have a simple, easy to understand but inefficient script so I understand what it's doing completely.
Any help on forcing SSIS to process one row at a time?
Lee Silverman
JackRabbit Sports
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Sep 25, 2007
Hi,
I am verifying my reports processing time. I get the information from the Reporting Service DB - [ExecutionLogs] table. I have the following information:
[TimeEnd] €“ time that reports generation ends.
[TimeStart] - time that reports generation starts.
[TimeDataRetrieval] - amount of time spent running the data sources.
[TimeProcessing] - time spent processing the report.
[TimeRendering] - time spent generating the output format.
If this information is correct the following statement should be true:
([TimeEnd] - [TimeStart]) = ([TimeDataRetrieval] + [TimeProcessing] + [TimeRendering])
But it isn't, ([TimeEnd] - [TimeStart]) is always bigger then ([TimeDataRetrieval] + [TimeProcessing] + [TimeRendering]).
Why does this happen?
Regards,
Rodrigo
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Apr 6, 2006
can anyone give me query processing for Database mirroring
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Nov 27, 2005
When using the AS processing task with a connection to "an Analysis Services project in this solution", only some processing options are available for processing dimensions. For instance, it is not possible to select "Process Update". Once I change the connection manager to point to the deployed cube database, I can choose from all the options. Is this by design?
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Feb 12, 2008
I need help from sql experts for the following problem
DOCTYPE DATE QTY PRD LOT
Purchase 1 jan 20+ AA 2007FW
Purchase 4 jan 50+ AA 2007SS
Purchase 9 jan 10+ AA 2007FW
Sale 3 jan 10- AA
Sale 4 jan 20- AA
Returned Good 4 feb 10 AA
As you can see I don't have the LOT code in sales records, so I must update these records with the following logic:
I have to assign LOT code to sales in FIFO order:
from the table above the 3rd of January I find the first sale of 10, take the first LOT (ascending date order), check for qty on hand (20+), consume 10 from LOT (10 remaining), update sale record with 2007FW LOT code.
Then I find next sale of 20, as before I take the first LOT with qty on hand to consume, again it's the first record with only 10 remaining so I set LOT qty on hand to zero but I have 10 more to allocate to a LOT code. So I find next available LOT of 50 and consume 10, with 40 remaining.
It's important to remember that I can sell part of a "lot", have to track the remaining goods per LOT
Is it possible in SQL to do that in batch mode? How? If I have to split sale record consuming 2 or more LOTS, how can I do? Can you show me SQL or good hints?
Thanx in advance
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May 22, 2008
Hi All,
I have 3 cubes in a single SSAS database and these cubes should be processed using the following schedule
Cube 1 - Every Day
Cube 2 - Every Week
Cube 3 - Every Month
Cube 4 - Every Day
The issue that I face is that these cubes share the dimensions and so I cant do a FULL process of these SHARED Dimensions as it will affec other cubes.
I can expect additions and deletions to my dimension data , but the structure remains the same. It would be great if someone can suggest how to go about processing the dimensions. I am confused with the number of options(Process Incremental, Process Update etc.,) available for processing the dimensions.
I will creating a SSIS package to automate the processing. One more question is say, if Cube 2 fails during a day and Cube 1 has succesfully processed on the same day earlier, how do I revert back to the old state of Cube 2? Does this mean that I need to do a back up of the SSAS database before processing each cube?
Apologies if I had missed anything.
Thanks!
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Dec 5, 2006
Hi,
I am in the midst of designing a new Data Warehouse system. As we get further into the design of the system, the more we are realising how complex our ETL is going to be and that the amount of time it will take to run could be significant i.e. a few days! My question is obviously I don't want to have a down time in my relational system for this long and prevent my users from accessing the data for days at a time each month. So what functionality should I be looking at to allow me to maintain a working copy of the data that users can query whilst I perform database updates and then perform a quick promotion of the updated data to users for querying?
If you can point me in the direction of the right functionality in SQL Server 2005 and possible some relevant white papers that cover this sort of scenario I would be grateful.
regards
Colin
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May 7, 2007
Stored procedure works:
PROCEDURE dbo.VerifyZipCode@CZip nvarchar(5),@CZipVerified nvarchar(5) outputAS IF (EXISTS(SELECT ZIPCode FROM ZipCensus11202006 WHERE ZIPCode = @CZip)) SET @CZipVerified = 'Yes' ELSE SET @CZipVerified = 'Not Valid Zip'RETURN
Need help calling and processing sp information:
protected void C_Search_btn_Click(object sender, EventArgs e){ SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["localhomeexpoConnectionString2"].ConnectionString); SqlCommand cmd = new SqlCommand("VerifyZipCode", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@CZip", UserZipCode_tbx.Text);
. . . how do you set up output parameter, call the SP and capture output. . . ? if (@CZipVerified == "Not Valid Zip") { TextBox5.Text = "Zip code not valid please re-enter zip"; } else { Continue processing page }
}
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Sep 14, 2004
How would I go about checking incoming e-mails? For example, on a certain e-mail address, I would get e-mails formatted in a certain way. According to the response, some scripts need to run/ some sql tables updates etc. How can one do this in (ASP) .NET with SQL Server? Anyone did this kind of stuff before?
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Mar 28, 2001
SQL 7 SP3
Hi.
I have a trigger that fires for any updates/deletes/adds and logs information via a sp call.
If I have more than one record, is there a better way to process them other than using a cursor ?
Yes, they have to be processed through the sp.
Thanks,
Craig
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Aug 14, 2000
When I process a new cube I recieve an error "Error (211): Unknown dimension member ' 8'; Time: 8/11/00 1:09:45 PM". Any ideas about what this error is about ?
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Jun 25, 2003
hii...
Is there anybody out there that can help me on how can I know the processing time taken for one transaction by using SQL Analyzer??
1)For example, I want to update using Analyzer and I would like to know time taken to do this update???
2) How to reduce processing time by using Store Procedures that using cursor?? I have add in some commit statement in my update statement.. Is there any other ways??
Please advise
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Jan 9, 2004
Hello DBA's:
I need to extract a particular file from our AS 400 system on a daily basis and do some processing on it. Also I want to do the daily processing only on those records that have been added/updated since the initial load.
Here is the approach and possible implementation.
Approach
I have the DB2 source data containing 10 columns (Col1 to Col5 together form the key) and the rest are attributes. I am interested only in the key and two attributes. So I load my table with only Col1 to Col7 ( 5 for key and the two attributes). I then do my processing on this table.
Here is the implementation given by a member of dbforums -
You'll then have to deal with 3 potential actions,
INSERT: New records on the file.
DELETES: Records that don't exists.
UPDATES: Records that are on the file, but attributes have changed.
You had given me this code template.
CREATE TABLE myTable99 (
Col1 char(1)
, Col2 char(1)
, Col3 char(1)
, Col4 char(1)
, Col5 char(1)
, CONSTRAINT myTable99_pk PRIMARY KEY (Col1, Col2))
CREATE TABLE myTable00 (
Col1 char(1)
, Col2 char(1)
, Col3 char(1)
, Col4 char(1)
, Col5 char(1)
, CONSTRAINT myTable00_pk PRIMARY KEY (Col1, Col2))
GO
INSERT INTO myTable99(Col1,Col2,Col3,Col4,Col5)
SELECT '1','1','a','b','c' UNION ALL
SELECT '1','2','d','e','f' UNION ALL
SELECT '1','3','g','h','i' UNION ALL
SELECT '1','4','j','k','l'
--DELETED
INSERT INTO myTable00(Col1,Col2,Col3,Col4,Col5)
SELECT '1','1','a','b','c' UNION ALL--NO CHANGE
SELECT '1','2','x','y','z' UNION ALL-- UPDATE (My comment - Instead of an update I want to insert a new record)
SELECT '1','3','g','h','i' UNION ALL--NO CHANGE
SELECT '2','3','a','b','c'--INSERT
GO
SELECT * FROM myTable99
SELECT * FROM myTable00
GO
--DO DELETES FIRST (My comment - Before deleting, I want to copy the rows that I am going to delete on a separate table to maintain history. Then I want to delete from a). I don't get the logic. If the rows of the old extract are not in new extract then delete them. So shouldn't it be <> instead of =. why the where clause condition)
DELETE FROM a
FROM myTable99 a
LEFT JOIN myTable00 b
ON a.Col1 = b.Col1
AND a.Col2 = b.Col2
WHERE b.Col1 IS NULL AND b.Col2 IS NULL
-- INSERT (My comment - I don't get the logic of the where. If the rows of the old extract are not in new extract then delete them. So shouldn't it be <> instead of =)
INSERT INTO myTable99(Col1,Col2,Col3,Col4,Col5)
SELECT a.Col1, a.Col2, a.Col3, a.Col4, a.Col5
FROM myTable00 a
LEFT JOIN myTable99 b
ON a.Col1 = b.Col1
AND a.Col2 = b.Col2
WHERE b.Col1 IS NULL AND b.Col2 IS NULL
-- UPDATE
UPDATE a
SET Col3 = b.Col3
, Col4 = b.Col4
, Col5 = b.Col5
FROM myTable99 a
INNER JOIN myTable00 b
ON a.Col1 = b.Col1
AND a.Col2 = b.Col2
AND ( a.Col3 <> b.Col3
OR a.Col4 <> b.Col4
OR a.Col5 <> b.Col5)
GO
------------
Can anybody look at My comments and answer them or revise this code template if need be?
Brett Kaiser - I sent you an e-mail on this. Can you respond to it when time permits.
Thanks
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Feb 1, 2004
Hi All,
When I try to process my mail with xp_findnextmsg or xp_readmail or xp_sendmail i get these errors:
Server: Msg 18025, Level 16, State 1, Line 0
xp_findnextmsg: failed with mail error 0x80004005
Queries processed: 0.
Server: Msg 18025, Level 16, State 1, Line 0
xp_readmail: failed with mail error 0x80004005
Server: Msg 18025, Level 16, State 1, Line 0
xp_sendmail: failed with mail error 0x80004005
my configuration is:
ms sql 2000 sp3
outlook 2003 as mapi client
sql server is started under account for which mapi profile is configured
Does anyone know what is wrong, and how to solve this problem?
Thanks
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Mar 12, 2004
Hi everyone!
I created a DTS which does some data transformations before processing some cubes. It finished processing in abt 10mins when I run this DTS manually. However, when I schedule this DTS to run, it took around 3 over hours to run. Does anybody know where the problem lies? I have been looking for a solution for this for a long time and I'm hoping that somebody can help me...
Thank you!! :)
Michelle
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Apr 14, 2004
Hi,
I am trying to Process a analysis server Cube and I am getting an error message saying
syntax error converting the varchar value A.H to column of type int.; 22018.
Can somebody tell me how to remove this error.
Thanks,
Praveen
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Feb 16, 2015
I did Index defragmentation a week ago . for 1 database only , In the middle of rebuild I kill the process twice cause It takes more than 1 hour so I killed it and wonder how many high level fragmented indexes left ...
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