Long Memory Grant Queue Waits In SQL Server Express SP2 Causes Slow Queries
Sep 10, 2007
I have a 2GHZ cpu with 1GB of RAM. I occassionally see very slow (long) queries against a local SQL Server 2005 Express (SP2) database. The issue occurs against different SQL Queries, but all queries are rather basic select statements Perfmon shows that the SQL Server counter for the "MEMORY GRANT QUEUE WAIT Avg MS" gets extremely high (25000+ ms). Perfmon also also shows that PAGING is not occuring, and the system is not under unsual stress. The problem is not reproducible with MSDE.
Has anyone seen this issue, or have any recommendations for a next course of action?
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Jul 17, 2007
Some queries take a long time to complete.
Setup is:
- SQL Express SP2
- Windows Vista Business
- 2 GB RAM
- Core 2 Duo processor
- Connecting to (local) server with SQL Authentication
- only 1 Instance of MSSQLSERVER
Simple queries (SELECT * FROM TableName) wher the table has only a few records. This query may take up to 30 or more to execute. This slowness is consistent to certain tables. Other much larger tables run queries fine.
If a different computer logs in to the same server, queries provide instantaneous results.
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Jul 20, 2006
Hello,
I seem to be misunderstanding the way transactions work with service broker queues. We have developed and deployed a service broker application that 5 queues and a windows service for each queue on multiple servers (3 currently). Due to a last minute issue, we had to not use transactions when the services executed a recieve and I am not updating the code base to use transactions and am running into blocking issues. One of the services runs for 90 seconds (spooling to the printer) and all of the servers block on the receive operation for this queue. I thought that if I was receving messages from a single conversation, other receives against this queue would not block.
Thanks,
Jim Stallings
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May 16, 2015
How to accurately track how much memory was granted to a DBCC checkdb during it's execution?
I'd like to do this without continuously querying dm_exec_query_memory_grants, if at all possible - but if that's the only option.
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Sep 19, 2015
I've been having some trouble getting a single-column "varchar(5)" field to reliably use a table seek instead of a table scan. The production table in this case contains 25 million rows. As impressive as it is to scan 25 million rows in 35 seconds, the query should run much faster.
Here's a partial table description:
CREATE TABLE [dbo].[Summaries_MO]
(
[SummaryId] [int] IDENTITY(1,1) NOT NULL,
[zipcode] [char](5) COLLATE Latin1_General_100_BIN2 NOT NULL,
[Golf] [bit] NULL,
[Homeowner] [bit] NULL,
[Code] .....
Typically, this table is accessed with a query that includes:
SELECT ...
FROM SummaryTable
WHERE ixZIP IN (SELECT ZipCode FROM @ZipCodesForMO)
This query insists on using a table scan. I've tried WITH (FORCESEEK) for example, but that just makes the query fail.
As I've investigated this issue I also tried:
SELECT * FROM Summaries WHERE ZipCode IN ('xxxxx', 'xxxxx', 'xxxxx')
When I run this query with 64 or fewer (actual, valid) ZIP codes, the query uses a table seek.But when I give it 65 or more ZIP codes it uses a table scan.
To summarize, the production query always uses a table scan, and when I specify 65 or more ZIP codes the query also uses a table scan. I'm wondering if the data type of the indexed column (Latin1_General_100_BIN2) is somehow the problem. I'll likely try converting the ZIP codes to an integer to see what happens.
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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
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Jul 7, 2014
I have a remote server with SQL server 2014 instance on it. There is nothing else running on the SQL Server box(dedicated SQL box). There is only one instance of SQL 2014 on the server. No other versions of SQL server are on the server.
Issue:
1. When I execute a query connecting to the SQL server instance through my local SSMS, the query executes in 30 secs.
2. When i connect to remote server through windows RDP session and execute the same query in the SSMS(on server), then query executes in 1 minute.
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Mar 30, 2015
Our monitoring tool shows that our production system periodically experiencing large rate - up to 800 memory pages/sec. How to find out which particular queries, S.P., processes that initiate this?
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Apr 3, 2008
1. could any one tell me in a simple way how to troubleshoot long running queries.
2.what is the default recovery model
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May 9, 2008
Hello,
I want to find long running queries?
Can any one help me?
Thanks
Prashant Hirani
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Mar 5, 2002
Hello All
I have queries which take over 30 secs to run, which I wish to monitor.
Currently, I am monitoring using sql profiler.
Is there any way of setting up mail to e-mail me when such a query happens.
Could I set up an Alert, or is there some other method.
I want to be able to react to these events faster before the users complain.
I am using sql server 7 enterprise and I have exchange set up.
Any help would be great
Pargat
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Jun 5, 2007
Has anyone had thsi issue, if so what was the fix?
We installed service pack2, the day after 2 of our production jobs started taking a long time to complete and causing a ton of blocking.
it went from running in 2 minutes to now taking 3 hours and 29 minutes to run. Can someone help?
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Aug 30, 2006
I have a table that contains approx 200 thousand records that I need to run validations on. Here's my stored proc:
[code]
CREATE PROCEDURE [dbo].[uspValidateLoadLeads]
@sQuotes char(1) = null, @sProjectId varchar(10) = null, @sErrorText varchar(1000) out
AS BEGIN
DECLARE @ProcName sysname, @Error int, @RC int, @lErrorCode bigint, DECLARE @SQL varchar(8000)
IF @sQuotes = '0'
BEGIN
UPDATE dbo.prProjectDiallingList_staging
SET sPhone = RTrim(LTrim(Convert(varchar(30), Convert(numeric(20, 1), phone))))
END
ELSE
BEGIN
UPDATE dbo.prProjectDiallingList_staging
SET sPhone = phone
END
--2. Remove quotes
UPDATE dbo.prProjectDiallingList_staging
SET sphone = REPLACE(sphone,'"' , '')
--3. Remove decimal, comma, dashes, parenthesis
UPDATE dbo.prProjectDiallingList_staging
SET sphone = replace(replace(replace(replace(replace(replace(sphone,'.',''),',','' ),'-',''), ' ',''), '(', ''), ')', '')
--4. Update failed Validation column if not 10 digits
UPDATE dbo.prProjectDiallingList_staging
SET sFailedValidation = 'X'
WHERE(Len(RTrim(LTrim(sPhone))) <> 10)
--5. Dedup
UPDATE a
SET a.sFailedValidation = 'X'
FROM dbo.prProjectDiallingList_staging a (nolock)
INNER JOIN dbo.prProjectDiallingList_staging b
ON a.sPhone= b.sPhone
WHERE(a.iList_StagingID > b.iList_StagingID)
--6. Update failed Validation column if not numeric
UPDATE dbo.prProjectDiallingList_staging
SET sFailedValidation = 'X'
WHERE(IsNumeric(RTrim(LTrim(sPhone))) = 0)
--7. Update time zones
UPDATE s
SET s.sTimeZone =z.sTimeZone
FROM dbo.prProjectDiallingList_staging s (nolock)
LEFT OUTER JOIN dbo.prPhoneTimeZone z
ON left(rtrim(ltrim(s.sphone)),3) = z.sPhoneAreaCode
--8. Insert into dialing table only records that have not failed the validation
INSERT dbo.prProjectDiallingList(iPrProjectId, sPhoneNumber, sTimeZone)
SELECT @sProjectId,sPhone, sTimeZone
FROM dbo.prProjectDiallingList_staging
WHERE ISNULL(sFailedValidation,'1') = '1'
UPDATE d
SET d.bProcessReporting = 1
FROM dbo.prProjectDialling d
WHERE d.iPrProjectId = @sProjectId
END
[/code]
When I execute this stored proc it runs for more than 5 minutes. Is there anything i can do to speed it up? Maybe there is a faster way of writing these queries?
Thanks,
Ninel
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Jul 21, 2001
Is there any way to measure the progress of a long running query,
for instance, to find where in a query plan a query is in SQL 7.0?
I have a query I am running that is currently 2 1/2 hours into the
query. Since it's joining three large tables, one with 42 million rows
and two with 7 million rows, I'm expecting the query to take a
while. However, I have no way of estimating exactly how long
it will take. Before I ran it, I optimized it the best I could in
Query Analyzer using an estimated query plan, making sure I had
all the right indexes, etc. I've been trying to use the estimated cost
to project query time, but that hasn't been working since queries
with similar costs can take radically different amounts of time to
execute.
Now I'm sitting here waiting, wondering if the query is just taking
too long, and I should stop it and work on optimizing it some more
(since I will have to run a couple more queries like it), or let it
finish. But I have no clue how close it is to finishing. I've tried looking
at the Physical I/O given by sp_who2 and then trying to calculate the
number of pages it would have to read if it had to read everything
from disk, then estimating it's progress by that, but this seems dubious
at best, since I don't know a whole slew of factors (ie: how many
pages are being read from the cache, is my page calculation correct,
etc).
So, does anyone know of any way to figure out how soon a long
running query will finish in SQL 7.0?
Thanks.
--
Trevor Lohrbeer
trevor@truepeers.com
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Jul 20, 2005
I can't seem to find a step-by-step guide to how to detect orcontinuously monitor for long-running queries that is suitablefor a comparative SQL Server novice. I know that it is possibleto monitor for such with other database products - can anyoneenlighten me as to how this is done with SQL Server? Ideally,I'd like to snapshot running queries (preferably with querytext) at a particular instant via a script, although any helpto show what queries are running at an instant will be muchappreciated. Any ideas?__________________________________________________ ___________Are you Catholic ?http://www.CatholicEmail.com100s of FREE email addresses --->http://www.UltimateEmail.comSend an Online Greeting Card http://www.UltimateEcards.com
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Mar 3, 2006
Here is our problem...We are doing a lot of selects against a table that has one large fieldin it.If we do a select against all the fields except for description, thequery comes back relatively quickly. If we add that last field (768chars) to the query, our query takes 10x longer (5 seconds vs 56seconds.)When we run the one without the description column, we can watchperfmon and see a very quick spike to physical disk. If we add in thedescription field we can see that the server becomes I/O bound - thedisk sits at 100% until the query is complete.We have tweaked the min query memory setting for the server but itseems to have had no effect no matter how high we set it. Is theresome point at which MSSQL decides it cannot perform the transaction inmemory? What would I increase to cure this problem?For example:TMZDIFF int410WRITETIMEcharno 16System_Namecharno 64Timestampcharno16Name charno32Mount_Pointcharno32Size intno4 10Space_Usedintno410Space_Availableintno410Inode_Sizeintno410Inodes_Usedintno410Inodes_Freeintno410Space_Used_Percentintno410Inodes_Used_Percentintno410FS_Type charno8Space_Available_Percentintno410Name_U ncharno32Descriptionncharno768
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Mar 15, 2001
Hi,
Some of my queries are running too slow.It's taking as long as 30secs .Earlier the same query was taking less than 5 secs.
I understand the db has grown BUT I do not know to look at this query where should i start from and what should I look into.
It is on production server.
the db size is 15GB and unallocated is 9GB.
log space used is 4%.
TIA.
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Oct 10, 2002
Howdy. I have a table in my DB that has about 2 million records. The search times are taking 15 - 30 seconds depending on the number of records I am returning. Is this normal? The machine is NT 4 sp6a Dual PIII 866's with 1 GB of RAM on RAID5 SCSI disk. This seems like a long time to me. What kind of performance should I expect? Any kind of tuning steps I can take?
Thanks
Shane
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Jan 5, 2005
Hi All,
Am very new to SQL server so don't really understand what effects the speed of queries. I have the two below queries, which are nearly the same apart from one has a right join and the other doesn't. The both return about 5000 records, and I am implementing this query from an accss databse with an odbc link to sql server. What I don't understand is it takes about 8 seconds for the query with the right join in to return the records and only about 4 seconds for the one without. What I'm after really is just some general advice on how to bulid fast queries, and any advice on the two below queries would be nice. Thanks
SELECT Employees.Name, Calls.CallDate, Calls.CallTime, Calls.Callername, Contacts.CompanyID, Contacts.ContactID, Calls.CallerNumber, Calls.CallerCompany, Calls.ActionTakenID, Calls.OperatorID, Calls.Confirmed, Calls.Charged, Calls.Notes, Company.CompanyName, Operators.Operatorname, Calls.CallID, Calls.ShortMessage
FROM (Contacts INNER JOIN Company ON Contacts.CompanyID = Company.CompanyID) INNER JOIN (Operators INNER JOIN (Employees RIGHT JOIN Calls ON Employees.EmployeesID = Calls.EmployeesID) ON Operators.ID = Calls.OperatorID) ON Contacts.ContactID = Calls.ContactID
WHERE (((Contacts.ContactID)=1442))
ORDER BY Calls.CallDate DESC , Calls.CallTime DESC;
SELECT Employees.Name, Calls.CallDate, Calls.CallTime, Calls.Callername, Contacts.CompanyID, Contacts.ContactID, Calls.CallerNumber, Calls.CallerCompany, Calls.ActionTakenID, Calls.OperatorID, Calls.Confirmed, Calls.Charged, Calls.Notes, Company.CompanyName, Operators.Operatorname, Calls.CallID, Calls.ShortMessage
FROM (Contacts INNER JOIN Company ON Contacts.CompanyID = Company.CompanyID) INNER JOIN (Operators RIGHT JOIN (Employees RIGHT JOIN Calls ON Employees.EmployeesID = Calls.EmployeesID) ON Operators.ID = Calls.OperatorID) ON Contacts.ContactID = Calls.ContactID
WHERE (((Contacts.ContactID)=1442))
ORDER BY Calls.CallDate DESC , Calls.CallTime DESC;
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May 11, 2006
I'm posting this in the ClickOnce forums as well...
My application doesn't include the .mdf and .ldf files, rather it creates the database the first time the application is run using a script that is included in the build. I want to create the database in the ClickOnce data directory. The problem I'm having is that SQL Server complains when I execute the CREATE DATABASE command as follows:
CREATE DATABASE [C:Documents and SettingsxxxxxLocal SettingsApps2.0DataPQCK6EXN.5KGAW630RPT.VGOifie..tion_014028c05b1d6ec6_0001.0002_0e86966f19503c89DataiFieldMobile.mdf] ON PRIMARY
( NAME = N'myDatabase', FILENAME = N'C:Documents and SettingsxxxxxxLocal SettingsApps2.0DataPQCK6EXN.5KGAW630RPT.VGOifie..tion_014028c05b1d6ec6_0001.0002_0e86966f19503c89DatamyDatabase.mdf' , SIZE = 3136KB , MAXSIZE = UNLIMITED, FILEGROWTH = 1024KB )
LOG ON
( NAME = N'myDatabase_log', FILENAME = N'C:Documents and SettingsxxxxLocal SettingsApps2.0DataPQCK6EXN.5KGAW630RPT.VGOifie..tion_014028c05b1d6ec6_0001.0002_0e86966f19503c89DatamyDatabase_log.ldf' , SIZE = 1024KB , MAXSIZE = 2048GB , FILEGROWTH = 10%)
END
Here's the error:
System.Data.SqlClient.SqlException "The identifier that starts with 'C:Documents and SettingsxxxxxxLocal SettingsApps2.0DataPQCK6EXN.5KGAW630RPT.VGOifie..tion_014028c05b1d6ec6_0001.00' is too long. Maximum length is 128."
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Feb 22, 2001
We have just implemented our new app and I need to improve performance. We are the victims of not having a very adequate stress testing tool prior to launch. Is there an easy way to track all queries or stored procs longer than a specified time?
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Feb 26, 2001
We have just implemented our new app and are expericing some slowness but no blocking issues. Is there an easy way to track all queries taking over x seconds to run?
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May 7, 2002
Here's a little SP to break up those long-running, massively-locking, bring-app-to-a-halt queries. By default it does 500 rows at a time and allows for a maximum SQL query size of 4000 characters; it should be trivial to adjust those.
Cheers
-b
CREATE PROCEDURE p_BatchExecute (@vcSQL varchar(4000)) AS
set nocount on
DECLARE @iRows int
select @iRows=1
SET ROWCOUNT 500
WHILE @iRows>0
BEGIN
print 'Executing batch of 500...'
exec (@vcSQL)
set @iRows=@@ROWCOUNT
END
GO
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Apr 26, 2007
Hi,
I have got an application running which connects 2 databases and performs an action that copies data from one database to the other database.
When using SQL Server 2000 MSDE, it takes about 5 seconds.
When using SQL Server 2005 Express Edition it takes about 30 seconds.
For testing 2005, I use 'upgraded' databases, so same indexes and data. I tried reindexing the databases, but always get the same result.
My setup string for installing SQL Server 2005 Express is :
/qb ADDLOCAL=ALL INSTANCENAME=DBNAME SECURITYMODE=SQL SAPWD=QWERTY SQLACCOUNT="NT AUTHORITYSYSTEM"
The code (ADO) is something like :
SELECT FROM original database
-- do something with data
INSERT INTO other database
Until EOF
Any idea how to solve this ???
P.S. When perfoming a simple Query on the databases (with 1.000.000 rows result) with SQL Server Management Studio Express, I see 37 seconds for SQL Server 2000 and 33 Second for SQL Server 2005. That is more the result I expect.
-------
XPPro SP2 3Ghz 1Gb
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May 1, 2006
Hello,
i want to install the SQL 2005 express Server on a HP-Netserver LH4 with 1 Xeon 500 CPU. I know, that i must have a 600MHz CPU, but i cant change the CPU. Is there one way to start the SQL server?
Thanks
Michael
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Aug 6, 2007
Hi, I have absolutely no knowledge of PHP or SQL .... I moderate a PHPBB forum at www.savingshelterpets.com
Our web host (SiteGround) has taken our site down temporarily because we are overloading the server. I have no idea how to fix the problem, so hopefully someone here can help me out! Smiley
PHP version 4.4.4
MySQL version 5.0.27-standard-log
Here's the info sent to me by SiteGround (I don't understand a word of it!):
quote:Upon further investigation, it turned out that the following queries in your account are slow and heavily consume server resources:
# User@Host: savingsh_phpb1[savingsh_phpb1] @ localhost []
# Query_time: 4 Lock_time: 0 Rows_sent: 1 Rows_examined: 1284
use savingsh_phpbb2;
SELECT user_id, username, user_password, user_active, user_level, user_login_tries, user_last_login_try
FROM phpbb_users
--
delete from rs_stat_ip where platnost_do<'2007-08-03 16:49:43';
# User@Host: savingsh_phpb1[savingsh_phpb1] @ localhost []
# Query_time: 5 Lock_time: 3 Rows_sent: 1 Rows_examined: 0
use savingsh_phpbb2;
SELECT * FROM phpbb_optimize_db;
# User@Host: binaryte_lhlp1[binaryte_lhlp1] @ localhost []
--
# Time: 070803 16:50:27
# User@Host: savingsh_phpb1[savingsh_phpb1] @ localhost []
# Query_time: 4 Lock_time: 2 Rows_sent: 1 Rows_examined: 0
use savingsh_phpbb2;
SELECT t.topic_id, t.topic_title, t.topic_status, t.topic_replies, t.topic_time, t.topic_type, t.topic_vote, t.topic_last_post_id, f.forum_name, f.forum_status, f.forum_id, f.auth_view, f.auth_read, f.auth_post, f.auth_reply, f.auth_edit, f.auth_delete, f.auth_sticky, f.auth_announce, f.auth_pollcreate, f.auth_vote, f.auth_attachments
FROM phpbb_topics t, phpbb_forums f
In order to have the limitations removed, please optimize your script.
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Apr 9, 2008
Hi,
My company told me to prepare document on long runnings queries.
We have components and developed in vb6 and some methods are doing call to as400,db2,informix.
Here I am can not know how tackle and do reaserch on the same.
Question infront me as:
1. why timeout not happen on com+ components.
2. how to prepair document for my reaserch.
Thanks,
Bimal
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Apr 22, 2008
Hi,
I use a Remote Sql Server Express instance, and I have a strange behavior.. The first connection is really slow and I don't know how to fix that.I read some posts about this topic but I didn't find the right solution.Is there a way to "keep alive" the connection between my IIS server and the SQL one ?I check the auto-close property and it sets to false.
Any help ?
Stan
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Oct 30, 2007
Hi,
I've recently installed SQL Server 2005 Express on my PC (winXP).
I'm finding that SQL Server Management Studio Express runs very slow. Every simple task takes 10-60seconds (open table, creating a table, saving anything etc). I can't find an answer to this anywhere. I've read neumerous articles that people wern't online therefore it was running slow because a certificate was trying to verify in the background... but I'm online and I've disabled the certificate so it can't be that.
This is a fresh install so I can't understand why it runs so slowly! When I used to use enterprise manager with SQL Server 2000 it worked at lighting speed.
What's going on?
CHeers
Matthew
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Feb 27, 2008
Hi All
I struck up with Slow perfornace query,Please some body help me how to analyze Slow perforamnce queris.
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Jul 26, 2007
I'm working with a table with about 60 million records. This monster is growing every minute of the day as well, by 200,000 - 300,000 records/day. It's 11 columns wide, and has one index on a datetime column. My task is to create some custom reports based on three of these columns, including the datetime one.
The problem is response time. Any query executed on this table takes forever--anywhere between 30 seconds and 4 minutes. Queries such as this one below, as simple as it is, can take a minute or more:
select
count(dt_date) as Searches
from
SearchRecords
where
datediff(day,getdate(),dt_date)=0
As the table gets larger and large, the response time is going to get worse and worse. Long story short, what are my options to get the speed of queries down to just a few seconds with a table this big? So far the best I can come up with is index any other appropriate columns (of which there is one for sure, maybe two).
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May 23, 2008
All -
I am using SQL Server 2005 and I have an endpoint that exposes some stored procedures as web-methods in the endpoint.
One particular stored procedure I have exposed takes a long time to execute: about 10 - 15 minutes. While, it is OK, that this stored procedure takes this long, it is not desirable for the HTTP Request that executed this proc to not wait for that long.
What I want to be able to do is to call the stored procedure and have the call return immidetaly but the stored proc continues what its doing. I will call another stored proc at a later time to retrive the result of the first stored proc. The first proc will store its results in a temp table. I am thinking of using SQL Server Service Broker to achieve this.
Is there a better a way to achieve this? And how does SQL Server process the Service Broker requests, i.e., I dont want the query to be executed when the server is busy. Are there any hints that I need to give to Service Broker to be able to do this?
Thanks.
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Mar 10, 2008
I am running simple queries against test SQL Express installation and they take a very long time to return data. I have two SQL Express instances installed on colleagues' machines to which I connect for my testing and both exhibit the same problem. The setup is Windows XP SP 2 with 2 GB RAM and 3.6 GHz CPU. I am querying a table with around 7000 records and my query is simply SELECT TOP 1000 * FROM MyTable. It takes over 10 seconds to return the recordset!
I have done the research and found posts, which talk about AUTO_CLOSE option, indexes, query execution plan, etc. I have done everything those posts recommend, but performance is still terrible. All the instances have SQL 2005 SP2 applied.
I also found that the query runs fast locally on each SQL Express instance, the problem seem to happen when I am trying to pull the data over the network.
I am really not sure what else to look for.
Thank you,
Michael
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