Slow Query Response From A Linked Server
Oct 17, 2006
Hello,
I have 2 servers (say MAINSRV e SECSRV) running SQL2000 Standard SP3 on Windows 2000 Advanced within a NT (!) domain and each server is linked to the other.
My problem is that if I run a query returning few dozens of rows like:
SELECT * FROM MAINSRV.DbName.dbo.TblName TBLA
WHERE Fieldx = 'anyval'
from a client connected to the SECSRV server, it takes something like 35 minutes to complete, while the same query completes in no time when run on clients connected to MAINSRV.
Even the simplest SELECT Count(*) FROM... takes more than one minute from SECSRV while completing in a fraction of second from MAINSRV.
I tried to change the linked server security options (SQL/Windows), but the remote query remains slow.
There are no locks active on the table, both the servers have almost no load (CPU less than 10%, when tested) and the query returns just a few KBytes, so communication overhead will not be the problem.
Any suggestions will be very appreciated, thank you!!!
View 2 Replies
ADVERTISEMENT
Mar 16, 2006
Hi all,
I have a website www.searchcontracts.com which has a search feature on the front page. The problem is that whenever a search is submitted (without and filters) it processes extremely slow (if at all, sometime throws 'general network' errors). If working properly it will return about 500+ records. As far as i know if there should be no issues returning a recordset of this size. I have the site hosted in a shared environment and it uses a SQL2000 db. If you filter the search resutls, it's more reponsive (still fairly slow).
If you believe that the hosting server i'm using should be upgraded, what would be the best solution? Keep in mind that i want to be able to return way more than 500+ records in one go.
Thanks
Jakehttp://www.searchcontracts.comhttp://www.custommethod.comhttp://www.boozetour.com
View 3 Replies
View Related
Oct 16, 2006
Hello.I have a slow response with a system that I am setting up. The OS isWin 2000 Server with SQL Server 2000. My first execution of the SQLprocedure is slow (about 40 seconds), while the second execution isfaster (approx. 3 seconds and what I expect).Using query analyser I can leave the window up and come back ( aftersay 10 minutes ) and my next response is will be slow (and fasterstraight after this).The query itself is the "TOP 10" rows from a table of a remote DB (MSDE2000 - NT station).This is similar to;---------------------DECLARE @SelectRowsFromRemoteDB NVARCHAR(400)SET @SelectRowsFromRemoteDB = "SELCT a.* FROM OPENROWSET('SQLOLEDB', 'Remote', ....) a"EXEC sp_executesql @SelectRowsFromRemoteDB---------------------The CPU usage goes high (with Task Manager), but oddly the task withmost usage is the "Idle Process".Please help with an answeror a good starting point to known where the resources are being used.Regards JC.....
View 2 Replies
View Related
Oct 31, 2007
I am working with a client that after every reboot of there SQL 2000 DB server, they experience slow response time for a couple of hours. The server has 12 GB RAM and a Dual 3.8 processor. It is believed that the slow response is due to as queries run after the reboot, they are re-building information in memory and after the memory is built up, it goes back to the normal performance utilizing the memory for speed. Is this an accurate assumption or is there something else to be looking at after the server is rebooted?
Thanks,
JB
View 3 Replies
View Related
Jun 14, 2006
Hello can some one explain this to me and give me some advice. I have sqlserver1 and sqlserver2 I have a linked server set up [ipaddress] on both servers. When I pass a variable to the stored proc or the query it takes up to 20 seconds to return 1 row but if I replace my varibles like email='sqlboy@coxnet' and firstname='ted' and lastname='clien' it returns the one row im looking for in about 2 seconds but if I pass email =@email ,fname=@fname,lname=@lname I get the 20 second thing. The query is a stored proc being called from an asp app. I get the same results when I run this in query analyzer.
Here is the query.
DECLARE @email VARCHAR(75),@fname VARCHAR(50),@lname VARCHAR(100)
IF EXISTS (SELECT TOP 1 email
FROM [ipaddress].{database}.dbo.{tablename}--server1
WHERE email = @email )
BEGIN
set nocount on
SELECT TOP 1 email,
FIRSTNAME,
MIDDLENAME,
LASTNAME,
TITLE,
COMPANYNAME,
ADDRESS1,
ADDRESS2,
CITY,
STATE,
ZIP,
COUNTRY
FROM [ipaddress].{database}.dbo.{tablename} --server2
WHERE email in(SELECT EMAIL
FROM [ipaddress].{database}.dbo.{tablename} where email=@email--server1)
AND RecordStatusID ='1' and FirstName=@fname and LastName=@lname
END
ELSE
IF EXISTS (SELECT top 1 email,
FIRSTNAME,
MIDDLEINITIAL,
LASTNAME,
TITLE,
COMPANYNAME,
ADDRESS1,
ADDRESS2,
CITY,
STATE,
ZIP,
COUNTRY
FROM {databases}.dbo.attendees--server1
WHERE email =@email and FirstName=@fname and LastName=@lname)
BEGIN
SELECT TOP 1 email,
firstname,
MIDDLEINITIAL AS MIDDLENAME,
lastname,
title,
companyname,
address1,
address2,
city,
state,
zip,
country
FROM {database}.dbo.attendees --server1
WHERE email in (SELECT DISTINCT email
FROM server1.dbo.ebooksrequests--server1
where email=@email) and email=@email and FirstName=@fname and LastName=@lname
SET NOCOUNT OFF
END
View 4 Replies
View Related
May 14, 2008
When I launch Outlook, it takes forever for the program to finally open. With any inbound email, it stops processing whatever is underway at the time....and frequently there is a 2-3 second lag between keyboard input and what appears on the screen. SQLserver is usually consuming upwards of 1-gb of memory....help. Mike
View 1 Replies
View Related
Aug 21, 1998
Hi
I have Problem, My response time is too Low. Is Any one Know how to improve my response time. My DATABASE SIZE IS 11 GB. I didn’t change any configuration parameter after installing SQL Server. Right my server Having default configuration parameters. Whether I have to change any parameters or not. My queries will generate lot of temporary tables.
Thanks
JK
View 2 Replies
View Related
Aug 10, 1998
At my location we are running Great Plains on SQL server with the Great Plains client on the front end communicating over IP Sockets. Occasionally the client will stop responding for up to 15 minutes. This occurs to all clients at the same time. While this is happening I have ran performance monitor on the SQL server using the SQL counters and everything looks fine. Performance on the server and the network does not degrade. Only the Great Plains client is affected. From this I feel this is not a network problem. I would like some suggestions on what could possible cause this type of problem. I am really just looking for a starting point on where the problem may be originating from. Any suggestions will be greatly appreciated.
thanks.
View 1 Replies
View Related
Feb 29, 2008
Here is the configuration we have at our site:
64 bit virtual server - Clustered 64-bit SQL Server 2005 Standard SP2 listening on port 1433.
32 bit virtual server - 32-bit application that connects to above SQL Server 2005 via standard OLEDB driver installed with windows (String utilized: Provider=SQLOLEDB.1;Persist Security Info=False;Initial Catalog=applicationdb;Data Source=ServerInstanceName).
We are experiencing a slow reponse of 45 sec to more than a minute on a simple select statement on a table having 5000 rows.
The same select statement on the Server locally in Studio returns results back in 2 seconds or less. But from Stuido on any other desktop (remote) it takes 45 secs or more. Same slow response is seen by the application which is using OLEDB.
I've looked into some of the Server parameters but didn't find any clues.
Any help is greatly appreciated.
View 2 Replies
View Related
Sep 28, 2007
hi,
I ran into a situation that if I don't use sql server for a while, in MS SQL Server Management Studio, when I run some query again, it takes a long time to respond. I looked into it with Activity Monitor, seems like the query was waiting for something, in the process view tab, it shows that:
WaitType: LATCH_EX
Resource: LOG_MANAGER(112F88C8)
What is the latch-ex? What should I check next to find out the problem?
Thanks.
View 4 Replies
View Related
Feb 10, 2000
We did an in place convertion of our data base from MS SQL Server 6.5 to 7.0.
Our application is much slower now on SQL 7.0. Any idea why?
The following is a sample SQL statement that runs quickly on SQL 6.5 and takes a long time on SQL 7.0 I also attached the query plans from SQL 6.5 and 7.0.
SELECT Person_Name.PerNam_Person_Name_PK ,
Person_Name.PerNam_Row_Status ,
Person_Name.PerNam_Last_Name_Sndx ,
Person_Name.PerNam_Last_Name ,
Person_Name.PerNam_Name_Suffix ,
Person_Name.PerNam_First_Name ,
Person_Name.PerNam_Name_Prefix ,
Person_Name.PerNam_Middle_Name ,
Person_Name.PerNam_Event_Person_FK ,
Event.Evn_Event_Nbr ,
Event.Evn_Event_Type ,
Event_Person.EvnPer_Last_Name ,
Event_Person.EvnPer_First_Name ,
Event_Person.EvnPer_Middle_Name ,
Event_Person.EvnPer_Name_Prefix ,
Event_Person.EvnPer_Name_Suffix
FROM Person_Name , Event , Event_Person
WHERE (Person_Name.PerNam_Agency_ID = "CL")
AND ( Person_Name.PerNam_Event_Person_FK = Event_Person.EvnPer_Event_Person_PK )
and ( Event_Person.EvnPer_Event_FK = Event.Evn_Event_PK )
and (Person_Name.PerNam_Person_Name_PK = 0 or ( Person_Name.PerNam_Event_Person_FK = 581541) )
and ( Person_Name.PerNam_Row_Status <> "D" )
Query plan in SQL 6.5
SQL Server Execution Times:
cpu time = 0 ms. elapsed time = 31250 ms.
STEP 1
The type of query is INSERT
The update mode is direct
Worktable created for REFORMATTING
FROM TABLE
Person_Name
Nested iteration
Index : PK_Person_Name
FROM TABLE
Person_Name
Nested iteration
Index : PerNam_Event_Person_FK
FROM TABLE
Person_Name
Nested iteration
Using Dynamic Index
FROM TABLE
Event_Person
Nested iteration
Index : PK_Event_Person
TO TABLE
Worktable 1
STEP 2
The type of query is SELECT
FROM TABLE
Worktable 1
Nested iteration
Table Scan
FROM TABLE
Event
Nested iteration
Index : PK_Event
SQL Server Parse and Compile Time:
cpu time = 0 ms.
Table: Person_Name scan count 2, logical reads: 6, physical reads: 5, read ahead reads: 0
Table: Event scan count 0, logical reads: 0, physical reads: 0, read ahead reads: 0
Table: Event_Person scan count 0, logical reads: 0, physical reads: 0, read ahead reads: 0
Table: Worktable scan count 0, logical reads: 0, physical reads: 0, read ahead reads: 0
Table: Worktable scan count 1, logical reads: 1, physical reads: 0, read ahead reads: 0
SQL Server Execution Times:
cpu time = 0 ms. elapsed time = 62 ms.
Query plan on SQL 7.0
SQL Server parse and compile time:
CPU time = 431 ms, elapsed time = 535 ms.
.................
Table 'Event'. Scan count 1, logical reads 3, physical reads 3, read-ahead reads 0.
Table 'Event_Person'. Scan count 1, logical reads 6, physical reads 5, read-ahead reads 0.
Table 'Person_Name'. Scan count 1, logical reads 4588, physical reads 2, read-ahead reads 4092.
SQL Server Execution Times:
CPU time = 7921 ms, elapsed time = 13519 ms.
SQL Server Execution Times:
CPU time = 0 ms, elapsed time = 13781 ms.
View 2 Replies
View Related
Apr 5, 2007
Hi
i had a problem with the SSIS response time - its very slow.
When I try to open the solution and than click to open the Pakage it's take at least 6-10 minutes until it's open.
Please advice what can be the reason
10x
View 4 Replies
View Related
Jun 26, 2015
Using SSMS 2012, we are experiencing extremely slow response times when opening SQL job steps to edit and also deploying SSIS Pkg's. Sysadmins have no problem. Users in the ssis_admin role have no problem. It's the rest of the users who have issues.
View 1 Replies
View Related
Apr 29, 2008
Hi,
I have a problem with querying systemjobhistory data. Response time is slow and it is vary from time to time, sometime it takes few seconds and sometime it takes more than 2 minutes. I understand that there is quite a number of jobs in DB server and which might result in slow response time.
Is it possible to shorten the response time? like using index? My application is always look like hang when the query take very long time to run.
Any help is greatly appreciated. Thank you.
Regards,
maxChin
View 4 Replies
View Related
May 30, 2001
I need to push 40k rows daily to an Oracle database. I am on a Win2k Pro box with the 8.1 client and ADO 2.6 loaded. I've configured the linked server with the Oracle as well as the Microsoft provider and it takes over a minute to push just 24 rows, less than 100 bytes each, at it. Any suggestions?
View 1 Replies
View Related
Mar 6, 2001
I've connect some .DBF file to SQL server 7 with linked server option. My table have about 200.000 records. I've tried with ODBC and Jet 4.0 option (found in www.mssqlserver.com) but I've very slow response if I use a "where" in the select instance.
In fact I've the response after 10 seconds and during this seconds the processor go to 100%.
Does anyone found a most speed way to do this?
Thanks,
Andrea
View 1 Replies
View Related
May 11, 2007
I have a linked server set up on my local SQL 2000 instance. I try and run an update against an SQL 2005 database and it take 29 seconds. I checked the execution plan and it says it takes the entire time on the Remote Scan. Is there something I need to do to speed this up? There is an index on the PK that I am searching against.
View 2 Replies
View Related
Dec 26, 2003
Hi i have a sql server instance on my system and it is linking into an oracle database on another server. When i run queries against this other server...it takes forever...
However, when i use access, and link the table and run the same query against the oracle database...it runs immediatly.
I am very confused as to why there would be such a performance difference and why sql server would run so slow.
I am wondering if it has something to do with the way i configured the linked server. there are several options that I didn't know what they meant.
collation compatible (not selected)
Data access (selected)
RPC (not selected)
RPC Out (not selected)
collation name
connection timeout
query timeout
View 1 Replies
View Related
Mar 13, 2007
I am using two almost idential laptops, one with XP and one with Vista, the only differences is that the XP laptop has 1G of RAM and running Office XP and the Vista has 2G RAM and is running Office 2007.
I have a MS Access database that has linked tables to a SQL Server 2000 database. The performance of the Access database on Vista is 5-10 times slower on the Vista machine. Just flipping through records or opening forms can take 5 - 15 seconds on the Vista machine while the XP machine takes 1 sec or less.
What gives? I looked at the CPU performance and the network performance while the Access database was busy flipping through records, the network traffic was < 2% and the CPU would spike to 40% on one of the CPUs (dual core) but would remain under 5% most of the time.
I also previously had Office XP installed on the Vista machine and it had the same performance issue so bought and install Office 2007 on the Vista machine and it did not solve the problem.
It seems that Vista is doing something that is slowing down Access with linked tables. Is this a issue between Vista and using an ODBC connection to SQL Server?
Thanks in advance for any help on this
View 1 Replies
View Related
Aug 14, 2001
In an ASP, I have a dynamically created SQL statement that amounts to "SELECT * FROM Server1.myDB.dbo.myTable WHERE Col1 = 1" (Col1 is the table's primary key). It returns the data immediately when executed.
However, when the same record is updated with "UPDATE Server1.myDB.dbo.myTable SET Comments = 'blah blah blah' WHERE Col1 = 1", the page times out before the query can complete.
I watched the program in Profiler, and I saw on the update that sp_cursorfetch was being executed as an RPC once per each row in the table. In a table of 78000 records, the timeout occurs well before the last record is fetched, and the update bombs.
I can run the same statements in Query Analyzer from a linked server and have the same results. The execution plan shows that a Remote Query is occurring on the select that returns 1 row, and a Remote Scan is taking place on the update scanning 78000 rows (I guess this is where all the sp_cursorfetch calls are happening...?).
How can I prevent the Remote Scan? How can I prevent the execution of the RPC sp_cursorfetch for each row in the remote table?
Thank you!
View 2 Replies
View Related
Dec 28, 2006
Creating a web application. Running a simple query "SELECT username FROM vwCustomer"
vwCustomer is a view built on top of an Access DB which is set up as a linked server. Within SQL Server that view responds immediately. But when I try to access it from an ASP page it takes over 20 seconds to respond.
Used the following to create the linked server:
EXEC sp_addlinkedserver 'DBName', 'Jet 4.0', 'Microsoft.Jet.OLEDB.4.0', 'c:databasesdatabase.mdb'
GO
EXEC sp_addlinkedsrvlogin 'DBName', FALSE, NULL, 'Admin', ''
GO
The view is simply(this works fine in SQL Server):
SELECT * FROM DBName.db.dbo.customer
The ASP page:
SELECT * FROM vwCustomer
Can anyone give me a hint as to where the bottleneck is? Or how I can figure that out using SQL Profiler or something?
Please help!
View 3 Replies
View Related
Mar 30, 2001
Why is the response time to run a query faster when the output is displayed in grid format as compared to text format?
View 1 Replies
View Related
Jan 27, 2007
Hi there, I tried to make it different as usual but i´m stacked into this problem:Supose TABLE DetailsID_DET ID_CAR DETAILS1 3 1,2,3,4,5,62 4 2,43 5 5,6,7,8andTABLE Details_ItemsID_DI DETAIL_NAME1 Stereo HiFi CD2 Alarm3 AirConditioning4 LeatherSeats5 Pro Wires6 Aluminium WheelsThe problem appears when i need to bring CAR DETAILS (NAME) from TABLE DETAIL_ITEMS.Mi guess i that I should make something like:SELECT * FROM DETAILS_NAME WHERE id_di = (( Array(i) FROM Details )) one by one...I really dont know how to face it.First I thought in bringing ALL details_Items (datafieldtext = id_di and datavaluetext=Details_names) into a dataview.And then "somohow?" filter this dataview according with the Array previuosly splited by me with a For each function.Then I thought "Perhaps" there is a simpliest way to do that using SQL views, o advanced SQL QUERYS.and Finally I thought that creating a VIEW in for both TABLES would be great.The point is that, neither 1,2,3 options, honestly , I dont know how to face them.Thanks in advance, apologise my "rude" English grammar.LUCAS ( From Argentina )
View 2 Replies
View Related
Mar 26, 2007
Is there a way I can remove the 30 seconds limit response time on sql server 2005?
View 1 Replies
View Related
Sep 28, 2006
Is there a global variable or something of the sort that would tell me how long it took to execute a query??
I need to monitor my DB response times and we have a query that runs in under 2 seconds. So we want to run this query every couple of minutes and if it takes more than 12 sec to run, we want to send an email to our DB staff...
I know that I could take a time stamp before and after then subtract but I wanted to know if there was an easier way to do it..
Thanks.
View 3 Replies
View Related
Jul 23, 2005
I previously posted re. this, but thought I'd try again with a summary offacts.I have an Access 2000 MDB with a SQL Server 7 back end. There is a view thatis linked to the database via ODBC and has been in place for several yearswithout any performance problems.Recently I added a couple of fields to the output of the view, and it becamevery slow when scrolling. When just opened in the database window, thelinked view takes about a second to scroll down one screen. When opened inthe form (in Continuous Form view), it takes about 2-3 seconds. It used toscroll just about instantaneously.I tried removing the few fields I added to restore the view to its previousform, but it had no effect. The view was still much slower than it had been.The total number of records returned from the view is about 1300, so it'snot a large number of records. The view has about 25 fields.I found that when I link the view in the MDB without specifying a uniqueindex, it scrolls very quickly -- almost instantaneously. But when I specifythe unique index, it is slow. Since the view needs to be edited, it needsthe unique index defined.As noted, it's been in place for years, with a unique index defined, yetwithout the slowness. Any ideas as to what might have caused this and whatmight be done would be appreciated. I've included the SQL for the viewbelow.Thanks,NeilSQL FOR MAIN VIEW:SELECT INVTRY.[Index], INVTRY.TITLE, INVTRY.AUTHILL1,INVTRY.attFirstEdition, INVTRY.attSigned,ISNULL(INVTRY.attSignedPD, ' ') SignedCond, INVTRY.YRPUB,INVTRY.PRICE, INVTRY.Web, INVTRY.Status,INVTRY.WebStatusPending, INVTRY.ActivateDate,INVTRY.DeactivateDate, INVTRY.WebAddedBatchID,INVTRY.AllowDuplicate, INVTRY.WebAction,INVTRY.WebActionPending, INVTRY.DateModified,INVTRY.DateWebActionApplied, INVTRY.JIT, INVTRY.MImage,INVTRY.HImage, INVTRY.AdCode,CASE WHEN INVTRY.WebAddedBatchID IS NOT NULLTHEN - 1 ELSE 0 END AS OnWebFROM vwInventory_Dupes INNER JOIN(WebStatus INNER JOIN(INVTRY INNER JOINtabStatus ON INVTRY.Status = tabStatus.Status) ONWebStatus.WebStatus = INVTRY.Web) ON(vwInventory_Dupes.YearPub = INVTRY.YRPUB) AND(vwInventory_Dupes.SignedCond = ISNULL(INVTRY.attSignedPD,' ')) AND (vwInventory_Dupes.Signed = INVTRY.attSigned) AND(vwInventory_Dupes.FirstEd = INVTRY.attFirstEdition) AND(vwInventory_Dupes.Author = INVTRY.AUTHILL1) AND(vwInventory_Dupes.TITLE = INVTRY.TITLE)WHERE (((tabStatus.ForWeb) = 1) AND ((WebStatus.IncludeDupe)= 1))SQL FOR vwInventory_Dupes:SELECT INVTRY.TITLE, INVTRY.AUTHILL1 Author,Cast(attFirstEdition AS tinyint) FirstEd,Cast(attSigned AS tinyint) Signed,ISNULL(INVTRY.attSignedPD, ' ') SignedCond,INVTRY.YRPUB YearPubFROM WebStatus INNER JOIN(INVTRY INNER JOINtabStatus ON INVTRY.Status = tabStatus.Status) ONWebStatus.WebStatus = INVTRY.WebWHERE (((tabStatus.ForWeb) = 1) AND ((WebStatus.IncludeDupe)= 1))GROUP BY INVTRY.TITLE, INVTRY.AUTHILL1,Cast(attFirstEdition AS tinyint), Cast(attSigned AS tinyint),ISNULL(INVTRY.attSignedPD, ' '), INVTRY.YRPUBHAVING (((COUNT(INVTRY.[INDEX])) > 1))
View 12 Replies
View Related
Mar 18, 2008
Hi
I have a database and when I run a query on it the query takes 10 minutes to complete. I am running the following query
SELECT t103.cs_flag, t103.pr_flag, SUM (t103.amount), COUNT (t103.record_id)
FROM br_data t103
WHERE t103.acct_id = 12 AND (t103.state = 3 OR t103.state = 7)
GROUP BY t103.cs_flag, t103.pr_flag
The br_data table doesnt seem to be using its indexes ?? And it has around a million records. Now when I export the database and import on to another SQL server and then run the same query as above it only takes 1 or 2 seconds.
On the server that we are having problems with I have tried to re-build the indexes using DBCC DBREINDEX (br_data,' ',0) but this hasnt helped. I have also tried backing up the database, delete the database then restore, this also hasnt helped. I have no idea why the query runs slow on the original box, but then quick when I transfer it to another server??
Both servers are running windows 2003 with SQL 2000 SP4. There are no resorrce problems such as CPU / memory, Any ideas??
Thanks
View 1 Replies
View Related
Feb 20, 2004
hi
have a problem ...
I tried to test my statement in QA as it returns no dataset ,it gives me empty columns in return,I though it will return all the columns and some records of (lmeyer) as the current user ,who logged in on windows auth,but it return only the columns,is that means my query analyser cannot read the login1 ,column which has the username as (lmeyer)
select * from tstudents where (login1='@param1')
if not what could me wrong in my code ,because I get no response to the sql server
Public Function login(ByVal login1 as string) as dataset
Dim myconnection as new sqlconnection("server=G103-TT03;database=CampusLANDB;Trusted_Connection=yes")
dim mycommand as new sqlcommand ("Select * from tStudents Where login1 = @param1",myconnection)
mycommand.parameters.add(new SQLClient.SqlParameter("@param1",login1))
dim DS as new dataset()
try
myconnection.open
dim adpt as new sqldataadapter
adpt.selectcommand = mycommand
adpt.fill(DS,"tStudents")
catch ex as exception
throw new exception(ex.message)
return nothing
finally
myconnection.close
end try
try
mydatagrid.datasource=DS.Tables("tStudents")
mydatagrid.databind()
catch ex as exception
errorlabel.text=ex.message
end try
return DS
End Function
thankx in advance
pamela mkosana
View 12 Replies
View Related
Nov 8, 2006
Hello,
i have created an RPC from my SQL server which queries a database of a linked server (remote server).
the query result is very very slow. (it is a mis-size query, with many JOINs on tables with many entries). Let's say it takes about two minutes to get about 3000 results.
The query uses five tables in the database of the linked server, runs a few (let's about 5-8) JOIN clauses and selects the entries. except for two tables (out of 8), each table has about 1000-2000 entries. the two have about 40,000 entries.
Is this normal?!
Is there anyway i can optimize my query?
i also tested my query and asked for only 100 results as opposed to all of the 3000. there was only 2-3 second difference in getting the results back, which indicates that it is not the remote connection but the query itself which is slow.
any help would be greatly appreciated!!
View 1 Replies
View Related
Feb 15, 2006
I have a very unusual situation - we converted a client from DB2 7.2 to MS SQL Server 2000, SP3. There is one report that runs very quickly when ran on the Database Server, but it takes a long time to complete when it is ran from a client system. This query is ran from within the application and not from within Query Analyzer.
Has anyone else here ever encountered this issue? What did it turn out to be? I am leaning away from it being a network issue.
Thanks in advance.
View 2 Replies
View Related
Jul 20, 2005
Hi All,I have a table that currently contains approx. 8 million records.I'm running a SELECT query against this table that in somecircumstances is either very quick (ie results returned in QueryAnalyzer almost instantaneously), or very slow (ie 30 to 40 seconds toreturn results), and I'm trying to work out how I improve performance.Essentially the query I'm running is nothing more complex than:SELECT TOP 1 * FROM Table1 WHERE tier=n ORDER BY member_id[tier] is a smallint column with a non-clustered, non-unique index onit. [member_id] is a numeric column with a clustered, unique index onit.When I supply a [tier] value of 1, it returns results instantaneously.I have no idea if this is meaningful, but the tier = 1 records wereloaded first into the table, and comprise approximately 5 millionrecords.When I supply a [tier] value of 2, the results take 30 to 40 seconds.tier =2 records were loaded second, and comprise approximately 3million records.I've tried running an execution plan, and while I'm no expert, itappears to me that the index on tier isn't being used, even if I use:tier = CAST(2 as SMALLINT)I'm wondering if anyone can give me ANY advice on how to get anybetter performance out of this SELECT statement?Also, out of curiosity, can a disk defragment have a positive impacton SELECT query performance?Any help very much appreciated!Much warmth,Murray
View 4 Replies
View Related
May 8, 2001
Greetings all,
I have successfully been able to use a SELECT query to see tables on a remote (Linked) server. Now, I want to be able to join those records with a WHERE clause to the same tables I have on my local database. The idea here is to be able to see current data on my local database(which is not current data), which resides in the remote database(which is current data). Here is what I have so far:
SELECT top 10 * from LinkServer.MC_Card.webuser.POS_TX
But, I'm not sure how to SELECT from two tables. Would I do a SELECT from the local database WHERE all records = records on the remote database?
Not sure how to do this. Is this what would be considered a Distributed Query? And how would I make this work with joins like the existing joins I have to the tables in my local database?
This is new territory for me. Sorry if this is such a newbie question.
Thanks,
Bruce
View 1 Replies
View Related
Nov 7, 2006
I'm using MS SQL Server Express and I've added a linked server. (I created the linked server by right mouse clicking on Server Objects, selecting SQL and entering the SQL2 as the name.) Now I'm trying to query a linked table. The following query works.
SELECT * FROM SQL2.PA.dbo.Counties
This one doesn't:
Select * from OPENQUERY(SQL2,"SELECT * FROM SQL2.PA.dbo.Counties")
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near 'SELECT * FROM SQL2.PA.dbo.Counties'.
Can you tell me why?
View 2 Replies
View Related
