Question About Performance Issues W/SQL2000 With NO Indexes
Jul 23, 2005
hello,
I've been assigned to do performance tuning on an SQL2000 database
(around 10GB in size, several instances).
So far, I see a single RAID5 array, 4CPU (xeon 700MHZ), 4GB RAM.
I see the raid5 as a bottleneck. I'd setup a raid 10 and seperate the
logs, database and OS(win2k).
The one thing that was a bit odd to me was that I was told this place
doesn't use indexes. The company is a house builder. They are pretty
large.
The IT manager isn't a programmer so she couldn't explain to me why no
indexes are used. She told me the programmers just don't use indexes.
Before I start investing more time on this, I'd really like to learn
about why you wouldn't want to use indexes - especially on such a large
database!
Thanks,
Oskar
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Jul 24, 2001
Why would something perform better on SQL 7.0 than SQL 2000?
The system runs fine for about 4 hours, then we will experience across the board timeouts. After stopping and re-starting the SQL Server service, performance is great.
Microsoft is telling us we need more clustered indexes (the database IS poorly tuned, but SQL 7.0 didn't seem to have a problem without them).
Any suggestions? Things are pretty bad here.
SQL2000 sp1 Win2000 sp1 4 CPU box
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Sep 7, 2007
how can we check the increase of performance after the creation of indexes
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Mar 16, 2001
Hi all,
Data load on a database without indexes(only nonclustered indexes on primary keys) took appx. 45 minutes.
Data load on the same database after creating many indexes (with default fillfactor of 0%)to improve query execution time took appx. 45 minutes.
Data load on the same database after creating many indexes (with fillfactor of 70%)to improve load time took appx. 90 minutes.
Can someone see the reason for this or justify this behaviour please?
Thanks in advance,
Praveena
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Nov 30, 2004
Many people know the importance of creating indexes on SQL Server database tables. Indexes greatly improve the performance of a database. However, while many people create indexes on their SQL Server tables, many people don't maintain them properly to ensure queries run efficiently as possible.
Thought you may be interested in a new article.
http://www.orcsweb.com/articles/index_overview.aspx
Thank you.
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Jan 25, 2008
OK so I have this EAV system on a server that is old enough for kindergarten. Insanely enough, this company that makes more money than any of your gods can not buy me a new box.
Before you say "redesign", I need funding allocated for that. See my first statement.
Anywho, I have this page that touches the dreaded Value table and does a clustered index seek on it. Can't search faster than that, right? Well I am getting some funding for "performance tuning". I am wondering if maybe incorporating some clustered index views involving the value table and producing a smaller clustered index for it to seek may alleviate some of this. Any thoughts?
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Sep 22, 2015
I'm trying to improve the loading of some tables with large amounts of data that forms part of an ETL. I was going to try removing any indexes before the inserting to speed up the process, but I had some questions on whether or not I should include the clustered index (assuming one exists).
I was originally planning on including a step to disable all indexes on the destination table using the following:
ALTER INDEX ALL ON MyTable DISABLE
Once the load had finished I'd simply rebuild all the indexes.
should I simply disable the non-clustered indexes?
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Mar 5, 2008
Dear all,
I'm using SQL Server 2005 Standard Edetion.
I have the following stored procedure that is executed against two tables (RecrodedCalls) and (RecordedCallsTags)
The table RecordedCalls has more than 10000000 Records and RecordedCallsTags is about 7500000 Records
Now the lines marked in baby blue are dynamic (Dynamic where statement) that varies every time this stored procedure is executed, may it contains 7 columns in condetion statement or may it contains 10 columns, or 2 coulmns.....etc
Now I want to create non-clustered indexes on the columns used in the where statement, THE DTA suggests different indexing whenever the where statement changes.
So what is the right way to created indexes, to create one index on all the columns once, or to create separate indexes on each columns, sometimes the DTA suggests 5 columns together at one if I€™m using 5 conditions, I can€™t accumulate all the possible indexes hence the where statement always vary from situation to situation, below the SP:
CREATE TABLE #tempLookups (ID int identity(0,1),Code NVARCHAR(100),NameE NVARCHAR(500),NameA NVARCHAR(500))
CREATE TABLE #tempTable (ID int identity(0,1),TypesCount INT,CallsType NVARCHAR(50))
INSERT INTO #tempLookups SELECT Code, NameE, NameA FROM lookups WHERE [Type] = 'CALLTYPES' ORDER BY Ordering ASC
INSERT INTO #tempTable SELECT COUNT(DISTINCT(RecordedCalls.ID)) As TypesCount,RecordedCalls.CallType as CallsType
FROM RecordedCalls LEFT OUTER JOIN RecordedCallsTags ON RecordedCalls.ID = RecordedCallsTags.CallID
WHERE RecordedCalls.ID <= '9369907'
AND (RecordedCalls.CallDate BETWEEN cast ('01 Jan 1910 00:00:00:000' as datetime ) AND cast ( '01 Jan 2210 00:00:00:000' as datetime ))
AND (RecordedCalls.Duration BETWEEN 0 AND 1000000)
AND RecordedCalls.ChannelID NOT IN('62061','62062','62063','62064','64110','64111','64112','64113','64114','69860','69861','69862','69863','69866','69867','69868')
AND RecordedCalls.ServerID NOT IN('2')
AND RecordedCalls.AgentID NOT IN('1000010000')
AND (RecordedCallsTags.TagID is null OR RecordedCallsTags.TagID NOT IN('100','200'))
AND RecordedCalls.IsDeleted='false'
GROUP BY RecordedCalls.CallType
SELECT IsNull(#tempTable.TypesCount, 0) AS TypesCount, CASE('English')
WHEN 'Arabic' THEN #tempLookups.NameA
ELSE #tempLookups.NameE
END AS CallsType FROM
#tempTable RIGHT OUTER JOIN #tempLookups ON #tempTable.CallsType = #tempLookups.Code
DROP TABLE #tempLookups
DROP TABLE #tempTable
Thanks all,
Tayseer
Any suggestions how to create efficient indexes??!!
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Oct 1, 2014
Is there a performance limit on the number of indexes per table / database ? With Filtered indexes there appear to be many more opportunities for more finely defined, and therefore smaller indexes resulting in many more indexes on a single table.
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Sep 23, 2015
My requirement is to sling a rowset from one place in SQL server into a table in another place in the most performant way. I want this to be parameterizable - I want to provide just a connection string and some SQL for the source and a connection string and a table name for the destination. The package should do the rest.Â
The solution I chose was an 2014 SSIS package with source and destination as ADO.NET connections configured from project variables. The package has a script task to bulk copy the data. For performance I disable the non-clustered indexes first.Â
But this performance precaution causes the bulk copy to timeout after delivering the correct rowcount to the destination table. What I can do to avoid this error?
Here's my script code:
//get hold of the source and a data reader from it
SqlConnection sqlconnSource = new SqlConnection();
sqlconnSource = (SqlConnection)(Dts.Connections["source"].AcquireConnection(Dts.Transaction) as SqlConnection);
SqlCommand sourcesqlCommand = new SqlCommand(SourceSQL, sqlconnSource);
sourcesqlCommand.CommandTimeout = 1500;
[Code] ....
This takes 128 seconds to put 13 million thin rows into my empty destination table and then throws an exception with this message:
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
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Jul 1, 2014
I'm working to improve performance on a database I've inherited, and there are several thousand indexes. I've got a list of ones which should definitely exist within the database, and I'm looking to strip out all the others and start fresh, though this list is still quite large (1000 or so).
Is there a way I can remove all the indexes that are not in my list without too much trouble? I.e. without having to manually go through them all individually. The list is currently in a csv file.
I'm looking to either automate the removal of indexes not in the list, or possibly to generate the Create statements for the indexes on the list and simply remove all indexes and then run these statements.
As an aside, when trying to list all indexes in the database, I've found various scripts to do this, but found they all seem to produce differing results. What is the best script to list all indexes?
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Sep 17, 2006
i have sql2000 & sql2005 on the same machine. I am unable to register my localhost in sql2000, get an access denied error. How can I make my localhost use sql2000 database?
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May 13, 2008
i am in the process of Migrating SQL 2000 to my new SQL2000 server i want to know the what would the best way for me to migrate one SQL server to another SQL server on the same network and rename the new server to the old server and bring it up for use in our ecommerce website.
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Sep 18, 2007
So I'm reading http://www.sql-server-performance.com/tips/clustered_indexes_p2.aspx and I come across this:
When selecting a column to base your clustered index on, try to avoid columns that are frequently updated. Every time that a column used for a clustered index is modified, all of the non-clustered indexes must also be updated, creating additional overhead. [6.5, 7.0, 2000, 2005] Updated 3-5-2004
Does this mean if I have say a table called Item with a clustered index on a column in it called itemaddeddate, and several non-clustered indexes associated with that table, that if a record gets modified and it's itemaddeddate value changes, that ALL my indexes on that table will get rebuilt? Or is it referring to the table structure changing?
If so does this "pseudocode" example also cause this to occur:
sqlstring="select * from item where itemid=12345"
rs.open sqlstring, etc, etc, etc
rs.Fields("ItemName")="My New Item Name"
rs.Fields("ItemPrice")=1.00
rs.Update
Note I didn't explicitly change the value of rs.fields("ItemAddedDate")...does rs.Fields("ItemAddedDate")=rs.Fields("ItemAddedDate") occur implicitly, which would force the rebuild of all the non-clustered indexes?
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Jun 25, 2015
I have a requirement to only rebuild the Clustered Indexes in the table ignoring the non clustered indexes as those are taken care of by the Clustered indexes.
In order to do that, I have taken the records based on the fragmentation %.
But unable to come up with a logic to only consider rebuilding the clustered indexes in the table.
create table #fragmentation
(
FragIndexId BigInt Identity(1,1),
--IDENTITY(int, 1, 1) AS FragIndexId,
DBNAME nvarchar(4000),
TableName nvarchar(4000),
[Code] ....
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Sep 17, 2006
What is the difference please?
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Sep 12, 2004
1. Use mssql server agent service to take the schedule
2. Use a .NET windows service with timers to call SqlClientConnection
above, which way would be faster and get a better performance?
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Jun 23, 2006
Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server with aparticular query. It would take approximately 22 seconds to return 100rows, thats about 0.22 seconds per row. Note: I ran the query in singleuser mode. So I tested the query on the Development server by taking abackup (.dmp) of the database and moving it onto the dev server. I ranthe same query and found that it ran in less than a second.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue is relatedto some external hardware issue like: disk space, memory etc. Or couldit be OS software related issues, like service packs, SQL Serverconfiguations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating system related issue.Any Ideas would help me greatly!Thanks,Brian T*** Sent via Developersdex http://www.developersdex.com ***
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Jun 22, 2006
Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server witha particular query. It would take approximately 22 seconds to return100 rows, thats about 0.22 seconds per row. Note: I ran the query insingle user mode. So I tested the query on the Development server bytaking a backup (.dmp) of the database and moving it onto the devserver. I ran the same query and found that it ran in less than asecond.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue isrelated to some external hardware issue like: disk space, memory etc.Or could it be OS software related issues, like service packs, SQLServer configuations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating systemrelated issue.Any Ideas would help me greatly!Thanks,Brian T
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Sep 5, 2006
Hi,I have made a web application using SQL Server 2005
Express with a few admin pages that require login. I used the SQL
Server Managment Studio Express to setup users and groups and it works
fine. But the web server has SQL Server 2000 and all I get is a
user id and password to access the database. It seems I cannot use the
Login control I put on my "login.aspx" page becuase it uses the
integrated authentication which chokes on 2000. I am afraid I wonlt be
able to use some of the 2.0 features such as profiles, ... Is
this the way 2.0 works with SQL Server 2000? Should I ditch the ISP if
they only give me a single access to database with no provisions to
create users. (I was told I had to create a "Users" table and manually
assign ids and passwords and that I can only use the user id and
password they supplied to setup the connection string in the script.)I appreciate your help.
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Mar 8, 2001
Does anyone know when SP1 will be available for SQL2000??
Thanks,
Steve Bajada
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Oct 23, 2000
Are there any advantages/disadvantages of running SQL2K on NT4 as opposed to running on WIN2K?
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Jan 7, 2008
pls tell me abt log shipping in sql2000
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Jul 13, 2006
I am developing a Crystal Reports App in VS2005 (VB). I was originally working on an XP machine with MSDE and stored procedures where it worked fine.
I then transferred the development to a Win2003 machine with SQL2000 and am now getting the following error;
Failed to open a rowset. Description: 'Get_Calls_By_MLO_Date' expects parameter '@DT1' which was not supplied. Plus some other error detail.
Here is the SP.
CREATE PROCEDURE Get_Calls_By_MLO_By_Date @DT1 datetime, @DT2 datetimeASSELECT MLO, CallNo, DT, Type FROM ActionsWHERE dt >= @DT1 AND dt <= @DT2 AND ActionID=1 ORDER BY MLO, DTGO
If I transfer everything back to the XP machine it works fine.
Any ideas?
Thanks
Terry.
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Jun 1, 2007
How to lock a Row in SQL2000 so that nobody can select that row.
I applied ROWLOCK, but i am not finding the way.
My query is "SELECT * FROM tablename WITH (ROWLOCK)"
Is this the correct way to write locks.
I would be thankful if u help me
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Apr 18, 2006
I am exporting data to an Excel file via a scheduled DTS package. I need to be able to either overwrite the existing Excel file or delete it. I haven't found a way to do this yet. Any help, comments, or direction will be appreciated. TIA
Paul
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Apr 25, 2006
I want to insert some data into my SQLServer,For example：insert into xcjl(zch,xcsj) values('027741',getdate())
but ,the "zch" maybe have a few data,I want to insert these step by step,how can I do?
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Feb 20, 2001
Hi all,
We're beginning to migrate our 6.5 DB's to SQL2000. A question came up regarding naming conventions for stored procedures. In BOL it says that for SQL2000:
"Stored procedures with the prefix sp_ are first looked up in master. If a user-defined stored procedure has the same name as a system-supplied stored procedure residing in master, SQL Server always finds the system-supplied stored procedure. "
Behavior in 6.5 was the opposite: SQL Server searched the current database followed by a search in master.
We started several months ago renaming user stored procedures to "usp_XXX", but we still have many non-system sp's that still use "sp_". I'm looking for opinions of whether we should bite the bullet now and rename all our non-system sp's at this time; prior to moving our production environment to SQL2000. Will we see a performance gain since SQL will not have to hit master first before going to the current DB?
Any and all opinions welcome!
Thanks,
Tom Rosebrook
EMJ
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Jan 9, 2002
When bcp'ing in data into an sql 6.5 table that is NOT nullable, records in the text file that contain nulls are ommited, but valid records without nulls are inserted.
However, using exactly the same table structure and files on a newly installed sql 2000 server (sp2), as soon as the first invalid record in the text file (i.e. with a null value)is encountered, bcp'ing is terminated and NO records are inserted.
I can't find any option in bcp/sql 2000 to allow me to carry out a load as before.
The help files state that the default no. of invalid records allowed is 10 (both versions sql), and explicitly setting the -m option of bcp to 10 still doesn't work.
Most of the data i receive has at least one duff record
Is there an option in sql 2000 that allows me to have x number of duff records inserted before a full rollsback occurs?
I can't find anything in technet, msdn or books online.
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Aug 7, 2001
In a replication environment:
Does SQL 2000 standard edition support replication if it would be configured as a subscriber.
Is SQL 2000 Enterprise Edition required for a Publisher and Distributor or can you get away with standard edition.
In a web site environment how many CALs are needed when users access the database via webservers and middleware.
Thanks
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Jan 18, 2001
I am experimenting with the FOR XML AUTO clause in SQL2000, but instead of nicely structured XML I get one continuous string oftags that can't be parsed by IE5.5
The BOL seem to indicate just running the query in Query Analyser will produce nicely formatted XML output - can anybody tell me what is wrong?
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Jan 5, 2001
I need some strong points for the management to convince them to upgrade to sql2000 now than waiting for 6 months.
We are currently in process of developing this new product. All development is on sql7. I want to upgrade our database to sql2000 now rather than waiting after the release which might be in another 3 months.
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Jan 4, 2003
I crashed my HP portable that has SQL2000 ENT installed and I re-installed XP-Pro +SP1 and when I install SQL2000 ENT it refused to install saying ENT cannot install in this O/S. Did I miss anything ?
I went and checked another XP-Pro W/S and SQL2000 is intalled OK.
Anybody has any idea ?
Thanks,
Frank
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