Very Small Table Incredibly Slow
Jul 23, 2005
Hello.
I am administering a SQL Server (Enterprise Edition on Windows 2003)
from some month and can't understand what is going on in the latest
week (when the db grow a lot).
The DB is around 250G, and has one table with 1 billion rows. It is
performing in a decent way, but can't understand why a particolar table
has strong performance problem.
I have a stored procedure that read table from table A and insert them,
after processing in table B, and then move them in other table (similar
to a Star Schema) for reporting.
Table B is, for how the SP is written, not more than 3000 lines. Table
B is very simple, has 3 rows, and no index.
What is very strange is that performance of table B is really slow. If
I do a select count (*) from table_b it takes between 30s & 2minutes to
return it has 0 lines. When the stored procedure insert 1000 lines, it
takes 20/30 seconds and it takes 20/30 seconds to delete them.
To me it doesn't look like a lock problem, because it is slow also when
the only procedure that access that table are stopped. I did an update
statistics with fullscan on this table with no improvement.
The DB is on a Storage Area Network that should perform decently. The
LUN I use is configured to use a piece of 32 disk that are used also by
other application. I don't have performance data of the SAN. The
machine is an HP DL580 with 4 CPU (hiperthreading disabled), 8G of RAM,
AWE and PAE and 5G reserved for SQL Server.
I don't know what to do to solve this situation. Could it be a
"corruption problem" that slow this table so much? is it possible the
fact the db grow a lot in the last week created problem also to this
small and simple table?
Do you have any idea or hint on how to manage this situation, or
pointer to documentation that can help in analizing this situation?
For the ones that arrived till here, thank you for your time and
patience reading my bad english...
Best Regards,
Mamo
PS
I can't rewrite the stored procedure, because it is part of a closed
source product.
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Sep 6, 2006
I have a problem with bad perfomance with my import of data from a SQL Server 2000 database. I use an OLEDB datasource in my SSIS package to connect to the sql server 2000 database. My 2005 server runs 64bits but i dont think this is an issue. With this configuration the import is VERY slow, we are talking about 40+ minutes to get 3.5 million rows with about 20 columns. When i create a test DTS package on the SQL Server 2000 server itself and run it, its blazingly fast. Has anyone run into something similar?
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Jul 9, 2001
In my database/MY SERVER (SQL7/Win2K), I run a simple query with a Table/10000 rows (without cluster index):
SELECT * FROM TABLE
it take over 30s. Why it's slow? How can I check for reason? How to configure my server to improve performance?
Thanks in advance.
TH
----------------------------------
SP_CONFIGURE's RESULT in MY SERVER
----------------------------------
Table 'spt_values'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 0.
name minimum maximum config_value run_value
----------------------------------- ----------- ----------- ------------ -----------
affinity mask 0 2147483647 0 0
allow updates 0 1 1 1
cost threshold for parallelism 0 32767 5 5
cursor threshold -1 2147483647 -1 -1
default language 0 9999 0 0
default sortorder id 0 255 52 52
extended memory size (MB) 0 2147483647 0 0
fill factor (%) 0 100 0 0
index create memory (KB) 704 1600000 0 0
language in cache 3 100 3 3
language neutral full-text 0 1 0 0
lightweight pooling 0 1 0 0
locks 5000 2147483647 0 0
max async IO 1 255 32 32
max degree of parallelism 0 32 0 0
max server memory (MB) 4 2147483647 2147483647 2147483647
max text repl size (B) 0 2147483647 65536 65536
max worker threads 10 1024 255 255
media retention 0 365 0 0
min memory per query (KB) 512 2147483647 1024 1024
min server memory (MB) 0 2147483647 0 0
nested triggers 0 1 1 1
network packet size (B) 512 65535 4096 4096
open objects 0 2147483647 0 0
priority boost 0 1 1 1
query governor cost limit 0 2147483647 0 0
query wait (s) -1 2147483647 -1 -1
recovery interval (min) 0 32767 0 0
remote access 0 1 1 1
remote login timeout (s) 0 2147483647 5 5
remote proc trans 0 1 0 0
remote query timeout (s) 0 2147483647 0 0
resource timeout (s) 5 2147483647 10 10
scan for startup procs 0 1 0 0
set working set size 0 1 0 0
show advanced options 0 1 1 1
spin counter 1 2147483647 10000 10000
time slice (ms) 50 1000 100 100
two digit year cutoff 1753 9999 2049 2049
Unicode comparison style 0 2147483647 196609 196609
Unicode locale id 0 2147483647 1033 1033
user connections 0 32767 0 0
user options 0 4095 0 0
Table 'spt_values'. Scan count 43, logical reads 108, physical reads 0, read-ahead reads 0.
Table 'sysconfigures'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 2.
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Jan 5, 2007
Hi
We have SQL Express running very slowly on Small Business Server. Does
anyone know if there is a conflict between the two? Or any ideas on how
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(Autoclose is set to
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Jul 23, 2005
If I join Table1 to Table2 with a WHERE condition, isit the same if I would join Table2 to Table1 consideringthat the size of the tables are different.Let's assume Table2 is much bigger than Table1.I've never used MERGE, HASH JOINs etc, do any ofthese help in this scenario?Thank you
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Mar 10, 2004
Hello, could someone pls help me with this table design.
I have a project table and a code table. The code table has things like priorities (High, Medium, Low).
Now, I want all projects to be able to use these 'global' codes as well as define their own. So, they could define their own priority code 'Critical', that only their project can see.
Any help would be great.
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Jan 18, 2005
Dear Participant,
I face following problem by last few day, please help me for the same
My Mssql server 2000 with service pack 3 use for my lan bas users, normally they can work fine without any problem, but some time user not able to retrieve information from server. I had debugged this problem and found one small table with 50/60 records not retrieving for so long at clients machine. I open enterprise manage and trough that try to open table, but server in try mode only not show a single row after long time and give message client time out.
I open query analyzer and try to select * from table_name, it is also not retrieve a single row after long time and nothing got as a message.
Shutdown the server and restart , I am able to retrieve that table from EM, Query analyzer and from application also.
I don’t understand what is the problem.
Thanks
R.Mall
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Nov 14, 2003
Im having a lot of trouble inserting a small time value into a table cell. I gave the cell column the data type 'DateTime', i found i couldnt manually insert a time only value such as '12:30 PM' into a column with 'SmallDateTime'. Something about a "SmallDateTime Overflow Error". However if i enter a similar time value into a table column with the data type 'DateTime' it will happily accept it and leave it as entered.
The real problem seems to be when i try to send a time value to that column with my ASP.NET application. Because it inserts the time value and todays date. So that if i send:
12:30 PM
It will be stored as:
15/11/2003 12:30:00 PM
I only want to store the short time, not the date especially not the date that row was created on because thats useless for the purposes of what my application is trying to achieve and just creates problems down the track when selecting rows.
How can i correct this?
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Mar 8, 2005
Dear Participants,
We are using merge replication for multi locational database but we are facing one problem in only one table which is not included in replication-
Table name is xxxxmast has only 39 row static information, but it used by every users for all task as select only information from this table like-
Select fin_year into mem_variable from xxxxmast where co_name = :global_variable
go
Code validation from here only.
Right validation from here only.
Report retrival validation from here only.
It means its usage for select from every user frequentely for so many times but we have to only fetch information from this table.
It was working prior fine but rightnow get problem for while-
Today Dated 08-March this table not accessible fro three times in eight hours-
1st time for 10 minute.
2nd time 10 minutes
3rd time 52 minutes.
Users want to login but at the login time years and other validation from this table, so users awaited for above mention time.
We had have do following by yesterday-
Drop table xxxxmast.
Create table xxxxmast.
Insert required data.
This is realy trouble for our application.
Any help realy great for us.
Thanks
R.Mall
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Sep 20, 2015
I am trying to do a very small numbers table to compare A1c's against. However I am running into a issue when recursion hits the number 2.27 it starts to go out of my scope that I want with the next number being 2.27999999999999. Here is the code I'm using below. I need a Decimal(2,2) or Numeric (2,2) format with a range of 01.00 to 20.00. However every time I use Numeric or Decimal as the data type I get a error "Msg 240, Level 16, State 1, Line 5.Types don't match between the anchor and the recursive part in column "Number" of recursive query "NumberSequence"."
DECLARE @Start FLOAT , @End FLOAT ---DECIMAL(2,2) Numeric (2,2)
SELECT @Start=01.00, @End=20.00
;WITH NumberSequence( Number ) AS
(
SELECT @start as Number
UNION ALL
SELECT Number + 00.01
FROM NumberSequence
WHERE Number < @end
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Jul 18, 2006
Hi,
Please could you tell me how big sql tables are when people refer to them as small, medium and large? Preferably in terms of disk space or rows (each row in my table will contain a standard length job advert and 20 additional columns with an average of 8 characters)
Thanks for your help! :-)
Stu
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May 7, 2015
I have a very small SSAS database with around 35 Mb. I opened it on Excel 32 bits and started dragging fields to a pivot table and it started failing with memory errors. The behavior on the SSAS server was that memory started growing very fast until 8 GB (vm memory total) and then the error is reported in excel.
What might be the issue in such a small database? I would understand in a big database, but not on this one.
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Mar 7, 2014
Why the Indexes on table slow down the DML operation on table, what is the exact reason?
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Apr 5, 2007
Hello all. I've got a problem with really slow INSERTs on one (and only one) of the tables in a database. For example, using SQL Management Studio, it takes 4 minutes and 48 seconds to insert 25 rows. There are only about 8 columns in the table and only about 1500 records. All the other tables in the database are very fast for inserts.
Another odd thing uniquely associated with INSERTs on this table: prior to inserting the 25 new rows of data, SQL Management Studio tells me that it inserted 463 rows of data which I know did not happen. Here's the INSERT statement:
INSERT INTO FieldOps(StudySiteID
, QA_StructureID
, Notes
, PersonID)
SELECT DISTINCT StudySiteKey
, QA_StructureKey
, SampleComments1
, '25'
FROM ScriptOutput_Nitrate
WHERE (ScriptOutput_Nitrate.StudySiteKey IS NOT NULL)
and SQL Management Studio (eventually) says:
(463 row(s) affected)
(463 row(s) affected)
(25 row(s) affected)
The table has an index on the primary key (INT data type with auto increment). I tried running the following code to fix things but it made no difference:
USE [master]
GO
ALTER DATABASE [FieldData] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
GO
use FieldData
GO
DBCC CHECKTABLE ('FieldOps', REPAIR_REBUILD) With ALL_ERRORMSGS
GO
USE [master]
GO
ALTER DATABASE [FieldData] SET MULTI_USER WITH ROLLBACK IMMEDIATE
GO
I'm guessing that the problem might be related to the index (??). I don't know... Does anyone here have a suggestion as to what I should do to fix this problem.
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Sep 16, 2005
Hi,I have a table defined asCREATE TABLE [SH_Data] ([ID] [int] IDENTITY (1, 1) NOT NULL ,[Date] [datetime] NULL ,[Time] [datetime] NULL ,[TroubleshootId] [int] NOT NULL ,[ReasonID] [int] NULL ,[reason_desc] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_ASNULL ,[maj_reason_id] [int] NULL ,[maj_reason_desc] [nvarchar] (255) COLLATESQL_Latin1_General_CP1_CS_AS NULL ,[ActionID] [int] NULL ,[action_desc] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_ASNULL ,[WinningCaseTitle] [nvarchar] (255) COLLATESQL_Latin1_General_CP1_CS_AS NULL ,[Duration] [int] NULL ,[dm_version] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_ASNULL ,[ConnectMethod] [nvarchar] (255) COLLATESQL_Latin1_General_CP1_CS_AS NULL ,[dm_motive] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_ASNULL ,[HnWhichWlan] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_ASNULL ,[RouterUsedToConnect] [nvarchar] (255) COLLATESQL_Latin1_General_CP1_CS_AS NULL ,[OS] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_AS NULL ,[WinXpSp2Installed] [nvarchar] (255) COLLATESQL_Latin1_General_CP1_CS_AS NULL ,[Connection] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_ASNULL ,[Login] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_AS NULL,[EnteredBy] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_ASNULL ,[Acct_Num] [int] NULL ,[Site] [nvarchar] (255) COLLATE SQL_Latin1_General_CP1_CS_AS NULL ,CONSTRAINT [PK_SH_Data] PRIMARY KEY CLUSTERED([TroubleshootId]) ON [PRIMARY]) ON [PRIMARY]GOWhich contains 5.6 Million rows and has non clustered indexes on Date,ReasonID, maj_Reason, Connection. Compared to other tables on the sameserver this one is extremely slow. A simple query such as :SELECTSD.reason_desc,SD.Duration,SD.maj_reason_desc,SD.[Connection],SD.aolEnteredByFROM dbo.[Sherlock Data] SDWhere SD.[Date] > Dateadd(Month,-2,Getdate())takes over 2 minutes to run ! I realise the table contains severallarge columns which make the table quite large but unfortunately thiscannot be changed for the moment.How can i assess what is causing the length of Query time ? And whatcould i possibly do to speed this table up ? The database itself isrunning on a dedicated server which has some other databases. None ofwhich have this performance issue.Anyone have any ideas ?
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Feb 11, 2008
Hi,
We have developped an ETL. For development we used small test files (10 000 rows) to test if it works correctly.
This runs in less then a minute
In Test we are using a file which contains all rows (7 million). We did twice a test and we first stopped the process after a week and the 2nd time we stopped the process after a weekend.
We are able to trace the problem to the point where it has to sort the tables.
The proces is pretty simple. We use two connectors to directly connect to the tables.
Then we have two blocks to sort the data. And then we have one block to merge the data.
Should we which to let SQL do the sorting ? Since it is in staging is has no index on that column. A select on the tables with an order by takes 3 minutes to return all those rows.
Any idea's ?
Also is there a page with the best practices for ETL ?
Constantijn
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Aug 4, 2000
SELECT * on a 4000 row table is taking more than 12 seconds.
Other larger tables are not nearly as slow.
I've DBCC dbreindex'd, and dbcc showcontig shows density at 100%.
How can I figure out why this is happening?
What are some remedies?
Thanks for your help.
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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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Sep 25, 2007
Hi,
I have a table defined as such:
PosterArtId int no 4 10 0 no (n/a) (n/a) NULL
Graphic image no 16 yes (n/a) (n/a) NULL
GraphicFilename varchar no 50 no no no SQL_Latin1_General_CP1_CI_AS
I have a Stored Procedure defined in the database that queries this table (joins with some other tables) that takes about 1 1/2 minutes to return results (running directly in query analyzer). The table itself has 8900 records and the resulting stored procedure returns 33 rows.
I have backed up this database and restored it to another database on a different machine also running SQL Server 2000. When I run the same stored procedure on this 2nd database (note the contents of the database and this table are exactly the same), it runs very quickly - in about 2 seconds.
I'm trying to figure out what is causing the query to run so slow on the original database, which is our production database server (note that none of the other queries seem to be running extra slow on this machine, just this particular one).
I've since been reading up on storing images in the database and I don't think the images are stored "text in row" - I ran the command: €œSELECT OBJECTPROPERTY(OBJECT_ID('tblPosterArt'),'TableTextInRowLimit')€? and got a 0 return value.
My ultimate goal is to figure out:
1) why the timing is so different on the two databases even though the have the same data
2) is there something we can do to speed up the results on our production server
For the first goal, I'm heading down the path that something in the database backup/restore did not recreate the btree storage of the image data in the same manner. Would this be correct? If not, is there some kind of analysis that I can do that will tell me some useful information?
I've run the Stored Procedure for both databases in query analyzer with the "show execution plan", "trace", and "statistics" turned on. In the Execution Plan of the production database I see a significant amount of time in three areas: Nested Loops/Left Semi Join, Clustered Index Scan, and Clustered Index Seek. But being as I'm not a dba (nor do we have one on staff), I'm not sure how to interpret this data. I keep wanting to point to some sort of environment issue since the data is the same between the two machines.
I suppose there is nothing to do about the 2nd goal without knowing why the query on the one machine is taking so long. Any thoughts on how to get more information here?
Thanks,
Beth
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Feb 1, 2008
I have a table that has appx 3.2 million rows. see sp_help
Name Owner Type Created_datetime
-------------------------------------------------------------------
TB_SAAI014_BPD dbo user table 2005-08-10 11:33:23.893
Column_name Type Comp Lngth Prec Scale Nullable
------------------------------------------------------------------------
RowID int no 4 10 0 no
SPHInstID int no 4 10 0 no
BPDInstID int no 4 10 0 no
BMUID varchar no 11 no
InfoImblCfw numeric no 9 12 2 no
BMUPrdNonDel numeric no 9 12 2 no
PrdFPN numeric no 9 13 3 no
PrdBMUBalSrvVol numeric no 9 13 3 no
PrdInfoImblVol numeric no 9 13 3 no
PrdExpdMtrVol numeric no 9 13 3 no
BMUMtrVol numeric no 9 13 3 no
PrdBMUNonDelBidVol numeric no 9 13 3 no
PrdBMUNonDelOfrVol numeric no 9 13 3 no
TranLossFctr numeric no 9 15 7 no
TranLossMtpl numeric no 9 15 7 no
TradUnitName varchar no 30 no
TotTrdUnitMtrVol numeric no 9 13 3 no
BMUAppBalSrvVol numeric no 9 13 3 no
DTCreated datetime no 8 yes
DTUpdated datetime no 8 yes
Identity Seed Inc Not Repl
-----------------------------------------
RowID 0 1 0
RowGUIDcol
-----------------------------
No rowguidcol column defined.
Data Located on File Group
==========================
PRIMARY
Index Name Decsription Keys
----------------------------------------------------------------------------
idx_SPH_BPD clustered, unique located on PRIMARY SPHInstID, BPDInstID
This table has 1 clustered index based on its own unique record ID and that of its parent table record
I have an import process that adds appx 980 rows of data to this table and numerous rows to several other tables as part of a transaction and it ran in about 15 seconds.
However we suffered a server failure and it had to be rebuilt (Svr2k3), SQL 2000 re-installed (with default options) and the data base restored.
The same transaction is now taking 8 to 9 minutes.
I tracked it down to this particular table. Just doing a count(*) takes over 5 minutes. Select * where ID = 1 takes over 5 mins. Also, whenever the table is accessed you can hear the server thrashing the disks. Other tables, although smaller do not seem to be suffering from this masive performance drop..
I've tried droping and recreating the index. I have even created a copy of the table, with index, and still get the same issue with speed.
DBCC CHECKTABLE returns the following but takes 6 and a half minutes
DBCC results for 'TB_SAAI014_BPD'.
There are 3168460 rows in 72011 pages for object 'TB_SAAI014_BPD'.
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
No errors are shown
A DBCC CHECKTABLE on another table with 230 thousand rows, run at the same time only took 10 seconds
Can anyone please point me in the direction of things to check, try or repair.
Any help greatfully recieved.
Jinx1966
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May 30, 2007
Hi
I have an update query that joins with 2 table variables. this update updates about 50,000 rows in a table.
update table1
from @table2 t2
inner join @table3 t3
on t2.id = t3.id
where table1.id = t2.id
the problem is that sometimes this update takes forever. If I replace the table variable with regular tables, it only takes about 11 seconds.
I am not sure what the problem is. Could this be a problem with the tempdb. What should I be looking for in the tempdb that might cause a problem.
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Sep 1, 2000
I wonder how SQL Server 7 can be so slow!! I use an external application (that we made) which reads information from SQL Server 7 databases. What I mean is, one of my allications reads information about "users" and there is about 11500 rows in the table with 34 columns in each. My application shows information about one person at a time. And then there's a scrollbox at the bottom where one can scroll to see other users (about 11500 different users). When I'm using the scrollbars to move down and get information about other users, I see that the CPU-usage is 100% all the time. And the "hour-glass" (windows thingy to show that there's a delay) is shown for maybe a second. And at first it takes almost 10 seconds to (I suppose?) read in the information from the table into my application and show information about the first user.
I don't think it should take almost a second or so to just scroll this list of users. How can SQL Server be so slow? I have 196 megabyte ram on this computer that I use for development. All databases together are less than 15 megabytes. Less than 10 megabytes I suppose.
I mean, in Access97 it was much faster but whas gettins slower for certain occurances with much more data int he tables, and the whole idea of converting the system to SQL Server7 was to got fast responsetimes.
Just to clarify, the client-application and the SQL Server resides on the same computer right now so they don't have to go over some kind of network-conenction etc.
What is the big problem here?
regards, Bob Nachbar.
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Jun 30, 2004
I am using DTS to transfer some tables from one server to another as part of a migration. We want to be down for as little time as possible, but we need the most up-to-date copy of the database tables in question.
I am currently testing the transfer process in our test environment by migrating the data from one database to another on the same SQL instance.
There are 7 tables to transfer and the total size of the database is 450 MB (with around 117 MB used). The two largest tables have around 17,000 records each.
One table (the header) has no text column and it takes just a few seconds to transfer. The other table (the detail) has two columns, one of which is a text column (actually, its not fair to call it the detail table; the relationship is actually one-to-one, but for the sake of this discussion, let's leave it at that).
The header takes seconds to transfer, but the detail takes up to 18 minutes.
Physically, our test server is quite robust; 2 processors, a 3 disk RAID-5 for the data files and a separate RAID 1 partition for the logs. Performance counters don't indicate any real issues: during the transfer, the disk utilization on the data partition occasionally spikes to a high level, but comes right back down until the next spike (the spikes being separated by about 1 minute. No issues with memory, paging or CPU.
I have removed the clustered index on the affected table as well as the PK. No help.
Are text columns just slow? Is there something that I am missing?
Regards,
hmscott
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Jun 10, 2007
This is a really really odd problem.
Here's the situation. I've got a DB with several tables. Let's pick out two of those tables from the bunch.. they both have approx 2500 rows in them. I take one and duplicate it (right click, All Tasks->Export Data, copy tables, etc) and it duplicates just fine into another DB.
Now, the second table.. takes FOREVER. Yet it has the same amount of rows in it! And this is a flat table export.. I'm not including dependent objects or anything like that.
Not to mention this is slow, but when I use Red-Gate SQL Data Compare, it gets stuck when it hits this specific table.
Anyone have any idea what would cause this?
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Feb 15, 2006
Dear MS SQL Experts,I have to get the number of datasets within several tables in my MSSQL2000 SP4 database.Beyond these tables is one table with about 13 million entries.If I perform a "select count(*) from table" it takes about 1-2 min toperform that task.Since I know other databases like MySQL which take less than 1 sec forthe same taskI'm wondering whether I have a bug in my software or whether there areother mechanisms to get the number of datasets for tables or the numberof datasets within the whole database.Can you give me some hints ?Best regards,Daniel Wetzler
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Apr 30, 2007
Dear Gurus
When I open a large table (say more than 1,000,000 Rows) in the SSMS by right clicking on the table name, it takes a very big time to fully open the table.More than 20 minutes for 1,000,000 records on a local instance.
SQL Server 2000 EM was extremely faster. Does any one knows a work around?
I need to be able to view and edit the data in SSMS.
Thanks in advance.
Parviz
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Nov 15, 2006
HiWe have a SQL server 2000 SP4 on a windows 2003 2x3Ghz XEON 4 GB ram.We have a table looking like this with currently 6 rows. Total data is aprox10 kb i all row all together.CREATE TABLE [dbo].[BIOMETRICPROFILE] ([BIOMETRICPROFILEID] [bigint] IDENTITY (1, 1) NOT NULL ,[FINGERPRINTTEMPLATE1] [image] NOT NULL ,[FINGERPRINTTEMPLATE2] [image] NOT NULL ,[FINGERPRINTTEMPLATE3] [image] NOT NULL ,[FINGERPRINTTEMPLATE4] [image] NOT NULL ,[FINGERPRINTTEMPLATE5] [image] NOT NULL ,[FINGERPRINTTEMPLATE6] [image] NOT NULL ,[TYPE] [nvarchar] (50) COLLATE Danish_Norwegian_CI_AS NOT NULL) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]GOselect * from BIOMETRICPROFILE takes ~4 seconds (!) to execute thourgh Queryanalyzer. Alle other tables has no performance problems.We have a SQL 2005 express instalation on the same server. If we restore abackup from the sql 2000 database the query takes aprox ~ 15 ms.What isgoing on here?Has SQL 2000 problems with image fields? or how can we find the problem?RegardsAnders
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Jul 20, 2005
I am having performance issues on a SQL query in Access. My query isaccessing and joining several tables (one very large one). The tables arelinked ODBC. The client submits the query to the server, separated byseveral states. It appears the query is retrieving gigs of data from thetable and processing the joins on the client. Is there away to perform moreof the work on the server there by minimizing the amount of extraneous tabledata moving across the network and improving performance (woefully slowabout 6 hours)?
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May 4, 2007
Has anyone written or come across a routine that validates start and enddate in a slow changing dimension? (eg verifies there is no overlap in any of the records).
thanks in advance
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Oct 31, 2005
i have a MSSQL 2000 database with about 30 tables in it. On one of those tables i've defined an full text index on an image field. In this table are around 500 records with binary files.
it functioned well for a time but now when i try to upload a file into the table this goes extremely slow (300 KB takes over 3 minutes).
i tried disabling "change tracking" but this didn't help a thing
adding blobs to other tables (without fulltext index on it) still goes fast.
what could be a reason that the uploading goes so slow??
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Apr 9, 2008
Hello,
I have developed some packages to load data into "Fact" tables in the data warehouse.
Some packages are OK, other ones not. What is the problem?: some packages load fact tables with lots of "Lookup - Data Flow Transformation" into the "data flow task" (lookup against dimension tables) but they are very very slow, too much slow to be choosen as a solution.
Do you have any other solutions to avoid using "Lookup - Data Flow Transformation"? Any other solution (SSIS, TSQL and so on....) is welcome to speed up the Fact table loading process.
Thank in advance
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Aug 6, 2005
How to retreive the value of last identity has been updated in a database (SQL Server)?
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