Extremely Slow Client Connection To MSSQL
Jan 26, 2007
Hallo
i'm experiencing an extremely slow connection from a WXPP Sp2 client to a MSSQL2000 running on a W2k server. The client is running a VB6 application that connect with Windows authentication: every form requesting data opens with a long delay at the first launch; next attempts run normally fast.
In the same LAN there are some others identical clients, all running fine.
Every other network activity from that client is ok.
Where should i start to investigate from?
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Jul 20, 2005
Hi,I am seeing very slow connections from some client enterprise managersto server. Even at server level it takes 1 minute or less to open adatabase. I have adjusted some of the memory for the SQL server, butthere are only about 60 Dbs on the server, totalling about 2 GBs.CPU is very low at all times, 1 GB of ram, p3 1.4Ghz. SQL 2k.I know I should refrag the disk, but is there anything else I can doto speed up SQL operation via enterprise manager--ODBC connections is fairly fast, as well as query analyzer.Adam
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May 13, 2004
Hi guys.
I have a DTS package ON SQL 2000 which transfer data from AS400 to SQL 2000 using an ODBC Client Access 5.1 (The DSN was configured by a sysdmin on the AS400 so it is configured properly).
When i execute the package manualy (by right click and "execute package") the package runns fine and ruterns data in no time (Eproximatly 30000 rows in 15 sec).
The problem starts when a job executes the same packagee!!!
When i start the job, the DTS package is running Very Very Slow!!!!
sometime it takes Hours to return a few rows! and it seems that it is stuck.
The SQLAgent is running as a NT Account with Administrator rights, and has full access to the AS400!! so the problem is not the Agent.
by monitoring the AS400, i have noticed that the job/DTS is retreaving the first fetch quickly , and then it is in a waiting status
i have tried everything and cant seem to get this problem fixed
Does anyone know what could be the problem?
I Need Help Quick!!!
Thank You
Gil
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Apr 23, 2008
Hey Guys
I have a huge speed issue on one or two of my SQL Tables. I have included the basic design below.
Structure
Id
ParentId
Name
Group
Id
ParentId
Name
Weight
Products
Id
Name
StructureProducts
StructureId
ProductId
Imported
StructureGroups
StructureId
GroupId
GroupProducts
GroupId
ProductId
AnswerDates
Id
AssessmentDate
Scores <-- This table is the slow table
AnswerDateId
StructureId
GroupId (nullable)
ProductId (nullable)
Score >= 0 && <= 100
Ok, Structures are the start of everything. Structures, have children. If a group/product is Linked to a parent or child structure then that group/product is visible along the structure tree flow path. Groups, like structure have children. And also like structures, if a group is given a product, then that product is visible through the structure tree flow path.
Example:
Earth [Structure]
- Asia [Structure]
--- China [Structure]
--- Japan [Structure]
----- Computer Stuff [Group]
------- Desktops [Group]
------- Servers [Group]
------- Laptops [Group]
--------- HP [Product]
--------- Dell [Product]
--------- Fujitsu [Product]
- Europe [Structure]
--- Germany [Structure]
----- Berlin [Structure]
--- Italy [Structure]
----- Rome [Structure]
----- Venice [Structure]
- America [Structure]
--- United States of America [Structure]
----- New York [Structure]
------- Computer Stuff [Group]
--------- Desktops [Group]
--------- Servers [Group]
--------- Laptops [Group]
----------- HP [Product]
----------- Dell [Product]
------- Home Stuff [Group]
--------- Kitchen Stuff [Group]
--------- bedroom Stuff [Group]
----- Washington [Structure]
------- Computer Stuff [Group]
--------- Desktops [Group]
--------- Servers [Group]
--------- Laptops [Group]
----------- HP [Product]
----------- Dell [Product]
----------- Acer [Product]
------- Home Stuff [Group]
--------- Kitchen Stuff [Group]
--------- bedroom Stuff [Group]
----- Chicago [Structure]
------- Computer Stuff [Group]
--------- Desktops [Group]
--------- Servers [Group]
--------- Laptops [Group]
------- Home Stuff [Group]
--------- Kitchen Stuff [Group]
--------- bedroom Stuff [Group]
- Africa [Structure]
--- South Africa [Structure]
----- Johannesburg [Structure]
------- Computer Stuff [Group]
--------- Desktops [Group]
--------- Servers [Group]
--------- Laptops [Group]
----------- Acer [Product]
------- Home Stuff [Group]
--------- Kitchen Stuff [Group]
--------- bedroom Stuff [Group]
----- Durban [Structure]
----- Capte Town [Structure]
- Australasia [Structure]
So the initial steps that happen (with regards to Scoring) are as follows.
1. Insert root score (which would be for a structure, a group, an answer date and either a product or no product
2. Score the next group up along the treeview, using the scores for the groups at the same level as the original group (0 score if no score exists).
3. Continue this till GroupTree is at root (parentid == null)
4. Using the next structure up along the treeview, repeat steps 2 & 3.
5. Continue steps 4 until Structuree is at root (parentid == null)
Example
Scoring a product for Johannesburg Acer Laptop would go as follows
1. Initial score for [Acer] product against Group [Laptop] for Johannesburg.
2. Calculate Score for all products (productid = null) against Laptop for Johannesburg
3. Calculate Score for [Acer] product against Group [Computer Stuff] for Johannesburg
4. Calculate Score for all products against Group [computer Stuff] for Johannesburg
5. Calculate score for [Acer] product against all root groups for Johannesburg
5.1. Group [Comptuer Stuff] and [Home Stuff]
6. Calculate score for all products against all root groups for Johannesburg
6.1. Group [Comptuer Stuff] and [Home Stuff]
7. Calculate score for [Acer] Product against Group Laptop for South Africa
8. Calculate Score for all products (productid = null) against Laptop for South Africa
9. Calculate Score for [Acer] product against Group [Computer Stuff] for South Africa
10. Calculate Score for all products against Group [computer Stuff] for South Africa
11. Calculate score for [Acer] product against all root groups for South Africa
11.1. Group [Comptuer Stuff] and [Home Stuff]
12. Calculate score for all products against all root groups for South Africa
12.1. Group [Comptuer Stuff] and [Home Stuff]
13. Calculate score for [Acer] Product against Group Laptop for Africa
14. Calculate Score for all products (productid = null) against Laptop for Africa
15. Calculate Score for [Acer] product against Group [Computer Stuff] for Africa
16. Calculate Score for all products against Group [computer Stuff] for Africa
17. Calculate score for [Acer] product against all root groups for Africa
17.1. Group [Comptuer Stuff] and [Home Stuff]
18. Calculate score for all products against all root groups for Africa
18.1. Group [Comptuer Stuff] and [Home Stuff]
etc. etc. etc...
This basicly coveres the concept behind the basic scoring methodology. Now the methodology splits into 2. The first Methodology 1, say it should do these calculations using the Exact same date as the original scored date. (Ie. if i do a score today, only scores on today will be used in the calculations). The other, Methodology 2, says that it should do the calculations on the latest available date. (Ie. If i do a score today, only scores from today and the latest before today will be used in the calculations).
Now to add another problem to this already complex process, is that each Group and each product within a structure can have either of the 2 scoring methodologies assigned to it. Also, products can only be scored against the structures and groups that they are assigned to. Ie, Acer exists in Laptop Group, in Johannesburg or South Africa or Africa, but doesnt exist in New York.
Ok, so now that i've explained briefly how this scoring works, let me get to the heart of the problem. Basicly its speed (can clearly see why), though the speed issue only comes
up in 1 Place. And that is where it has to look backwards for the latest available score for the required group, structure and product.
For this to happen i wrote a function
ALTER FUNCTION [dbo].[GetLatestAnswerDateId]
( @StructureId INT,
@GroupId INT,
@ProductId INT,
@AnswerDateId INT )
RETURNS INT
AS
BEGIN
DECLARE @Id INT
DECLARE @Date DATETIME
SELECT TOP 1 @Date = [Date]
FROM [dbo].[AnswerDate]
WHERE [Id] = ISNULL(@AnswerDateId, [Id])
ORDER BY [Date] DESC
SELECT TOP 1 @Id = ad.id--gs.[AnswerDateId]
FROM [dbo].[Scoring] gs
INNER JOIN [dbo].[AnswerDate] ad ON ad.Id = gs.AnswerDateId
WHERE [StructureId] = @StructureId
AND ISNULL([GroupId], -1) = ISNULL(@GroupId, -1)
AND ISNULL([ProductId], -1) = ISNULL(@ProductId, -1)
AND [Date] <= @Date
ORDER BY [Date] DESC
RETURN @Id
END
Now on small amounts of data (1000 rows or so) its quick, though that is due to the fact that the data is minimal, but on large amounts of data this function runs for along time. Specificly in the context of the following when there is 6 months of scoring data (100 000+ rows) to peruse.
SELECT [StructureId], [GroupId], [AnswerDateId], [ProductId], [Score]
FROM [Scoring]
WHERE AnswerDateId = GetLatestAnswerDateId([Structure], [GroupId], [ProductId], null)
AND [StructureId] = South Africa
AND [GroupId] = Computer Stuff
AND [ProductId] = Acer
Any idea's on how to make this quick? or quicker?
My Current runtime for calculating the 2500 base scores (totals 100 000+- rows) takes 15 hours. Though this is an initial calculation and is only supposed to be done once.
Also, this calculations are all correct, so my only issue itself is the speed of the entire process.
Thanks In Adance
Jonathan
WARNING: Running on cold coffee!
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Hello! I have a query that join five tables and returns around 45000 rows that takes no more than a minute to execute, in management studio, on a SQL Server 2005, 2CPU 32 bit(dual core), 4GB and RAID5 disk system. The O/S is Windows 2003 sp2 Standard Edition.
When the same query is executed in SSRS2005, with some drilldown and summary of drilldown levels, it never stops to execute.
Looking at the hardware in the performance monitor reveals nothing strange except that % CPU-time is around 40 percent. Memory resources over 2 GB are available all the time.
Any suggestions is appreciated!
Any problems with SQL Server 2005 source database running on SQL Server 2000 compatibility level?
Thomas Ivarsson
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Hi!
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