I'll be running SQL v7.0 with raid level 0. The DB will have approx. 250 tables and 1200 indexes.
Can you have the indexes located on a physically separate drive with SQL v7.0 and would this be the best practice?
I'm aware that it's best practice to separate mdf and ldf files onto separate drives.
However, I see a lot of servers where the underlying disk array is the same for drives on the server.
Is there still any performance benefit to separating mdf and ldf files in this situation?
For example, a single virtual server running SQL Server, with multiple drives attached.All of the drives are connected to a shared storage via iSCSI.There drives C:, D:, E: etc are all actually sharing the same underlying disks.
Obviously, there are some benefits from an administration perspective whereby individual drives can be reconfigured without affecting the others.
Is this possible? I seem to remember doing it with SQL Server 7 a long time ago. The Microsoft Knowledgebase says it's not possible with 4.2 through 6.5, but nothing about 7.0 and up.
View 2 Replies View RelatedWe are in the process of replacing our primary production server. In the process of determining how SQL server is going to be structured, it has been suggested that I place all current and new indexes on a separate file group. These filegroups would then reside on a separate shelf on the server. What are the pros and cons of doing this?
View 2 Replies View RelatedWe are running SQL Server 2014 Enterprise Edition (64-Bit) on Windows 2012 R2 Standard (64-Bit).
1. When to create indexes, before or after data is added? Please address Clustered and Non-Clustered Indexes.
2. To move indexes to it's own filegroup, is it best to create the NON-Clustered Indexes on the separate filegroup with code similar to the example below?
CREATE NONCLUSTERED INDEX IX_Employee_OrganizationLevel_OrganizationNode
ON HumanResources.Employee (OrganizationLevel, OrganizationNode)
WITH (DROP_EXISTING = ON)
ON TransactionsFG1;
GO
I have read the following links that states that if you create the Clustered Index on a separate filegroup, it would also move the base table to that particular filegroup. (So I take it that you ONLY can move NON-CLustered Indexes to a separate filegroup.)
Placing Indexes on Filegroups:
[URL]
By default, indexes are stored in the same filegroup as the base table on which the index is created. A nonpartitioned clustered index and the base table always reside in the same filegroup. However, you can do the following:
• Create nonclustered indexes on a filegroup other than the filegroup of the base table.
Move an Existing Index to a Different Filegroup:
[URL]
Limitations and Restrictions
• If a table has a clustered index, moving the clustered index to a new filegroup moves the table to that filegroup.
• You cannot move indexes created using a UNIQUE or PRIMARY KEY constraint using Management Studio. To move these indexes use the CREATE INDEX statement with the (DROP_EXISTING=ON) option in Transact-SQL.
Hello all,
What is an easy way of scripting all the database tables and sprocs automatically to a separate file each one? I can't find this option in SQL Server Management Studio.
Or is any other way of uploading all objects to a Visual Source Safe project that does not require to copy and paste each script into a VSS sql script?
Thanks!
David
We have a table that we are using for inserts for every 2mins and it is a very large table.
I am panning to add this table to a separate file and file-group, so that i can keep this file in separate drive.And it will restore files level.
Is there any disadvantage if we create this table in this way.
Just a quick question, Is it better to build an Indexindicies after creating a new table or after populating the table with the data. Which is quicker? What about statistics? This table is dropped/and then recreated on a weekly basis. It is a reporting database.
Thanks.
I ran the index tuning wizard and it suggested 4 new indexes w/ a 20% improvement to be gained..
I saved the index creations to a script file and I'm curious if I can implement them at any time or is it better to do that after most of the users are done w/ the system for the day..
Also, any other performance suggestions to help speed up queries? Thanks in advanced..
Thanks to help from Ray Maio I have been able to create copies of various tables using the Select Into command.
Ray also responded that this command does does not transfer Primary Key and Index information.
I have attempted to create an index by using the following statement:
create nonclustered index SchoolIndx on wrestlerstest (School)
I did not get an error, but can't tell ift the index was created. The question is, how do I find out if
there is an index for the column School? Is there a command that will tell me. I'm just sending commands
to the server via a short .asp program and don't really know how to obtain a message back. Could I find the information
by browsing the
Thanks again in advance,
Greg Zafros
Hi
I want to know if we can create indexes on Views in SQL 7.0. If yes, then how
Thanks
alsi
Greetings all,
What's best practice for creating clustered indexes?! Should they be added to a table AFTER it has been populated or should the clustered index be created BEFORE?
Thanks for your advice in advance.
I know where the data files are etc, but what is the physical structure of a cube like on disk?
Logically we see the data as a star. Is the physical file akin to a star also? Or is a single file a measure group containing all the required member and measure data - thereby eliminating the need for physical join operators.
Hi,
I have a question do I have to increase the Transaction Log size to create new indexes after dropping existing one on a table which has 18108360 rows. I need to recreate 5 indexes on that table. As this table is corrupt. Let me know. The corruption was on one of the indexes of this table.
Thanks,
Cynthia
I have a mixed mode account setup with exec permissions granted on my stored procedures. I am running an sp that is editing a member, and if i run it using my query analyzer with the same login, my sp writes to the db. however, if i'm calling it through my web app (asp.net) it doesn't. here is my sp code:
USE DATABASE
--DROP PROC sp_EditMember
GO
--Create the stored procedure
CREATE PROCEDURE sp_EditMember
@member_id smallint,
@last_name nvarchar(50), --not nullable
@first_name nvarchar(50),
@spouse_name nvarchar(50),
@street_address nvarchar(50),
@city nvarchar(35),
@state nvarchar(5),
@zip_code nvarchar(15),
@zip_4 nvarchar(4),
@area_code nvarchar(10),
@phone_number nvarchar(20),
@email nvarchar(50),
@child_1 nvarchar(30),
@child_2 nvarchar(30),
@child_3 nvarchar(30),
@child_4 nvarchar(30),
@child_5 nvarchar(30),
@member_status nvarchar(20),
@member_exp nvarchar(10),
@plaques_st nvarchar(10)
AS
BEGIN TRAN
UPDATE Members
SET last_name = @last_name, first_name = @first_name,
spouse_name = @spouse_name, street_address = @street_address,
city = @city, state = @state, zip_code = @zip_code, zip_4 = @zip_4,
area_code = @area_code, phone_number = @phone_number, email = @email,
child_1 = @child_1, child_2 = @child_2, child_3 = @child_3,
child_4 = @child_4, child_5 = @child_5,
member_status = @member_status, member_exp = @member_exp,
plaques_st = @plaques_st
WHERE member_id = @member_id
IF @@ERROR <> 0
BEGIN
ROLLBACK TRAN
END
ELSE COMMIT TRAN
GO
--------------------------------------
on my app side- i've already ensured the datatypes match up and the sizes are all ok (except for member_id, the variable is an int and i pass it as a small_int- the number is ranging from 1000-10000).
any troubleshooting on this?
thanks in advance,
sudeep.
I would like to create an index on a table from the Database Explorer.
I am using Microsoft Visual C# 2005 Express Edition.
I downloaded Microsoft SQL Server Management Studio Express with the intention of using it to create an index, but it does not seem to find the database that I created from the Database Explorer.
Thanks!
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??!!
I have a table that is in a one way transactional publication. I need to create a full-text catalog on this table and have that catalog exist on the subscriber as well. I understand simply creating a FTC for an object in a publication will not cause that FTC to be replicated to the subscribers. I have scripted out the command and tried to use sp_addscriptexec to push it to the subscriber. When I do this, I get the following error:
Last 183 characters in 'sqlcmd' output buffer: Changed database context to 'database'.
Msg 574, Level 16, State 1, Server SQLSERVER, Line 2
CREATE FULLTEXT CATALOG statement cannot be used inside a user transaction.
Also, when this script is run directly from the subscriber, it works fine (but since the subscriber is our production machine, I'd prefer to not have to do it that way). I believe I can reinitialize the publication and have the FTC pushed to the subscriber, but this is not ideal either, since some of our databases can be very large and take a long time to initialize.
Is there a better way to accomplishing this other then connecting directly to the subscriber and running the script or by reinitializing the publication? Thanks for your help!
-mike
I hope i'm in the right place, but thanks anyway....
Actually i have 2 questions (regarding sql-server Indices/Keys):
1) I have an index, which is consisted of 4 columns.
I've read elsewhere that this index functions (as well) as an index (single column
index) on the first column of this multi-column index.
Does this mean that if i'd like to have (in addition) Indices on all of the 4 columns
seperately i need to define only 3???
2) I have a unique key consisted of multiple columns.
I'd like to save an index to this combination of columns as well (to speed up
things in DB...).
Does the definition of a multiple-columns key free me from defining the multiple-
columns index???
can anyone explain the main diference between Keys and Indices???
I hope i'm in the right place, but thanks anyway....
Actually i have 2 questions (regarding sql-server Indices/Keys):
1) I have an index, which is consisted of 4 columns.
I've read elsewhere that this index functions (as well) as an index (single column
index) on the first column of this multi-column index.
Does this mean that if i'd like to have (in addition) Indices on all of the 4 columns
seperately i need to define only 3???
2) I have a unique key consisted of multiple columns.
I'd like to save an index to this combination of columns as well (to speed up
things in DB...).
Does the definition of a multiple-columns key free me from defining the multiple-
columns index???
can anyone explain the main diference between Keys and Indices???
thanks,
Ran Kizi
I am trying to add 2 separate columns from separate tables i.e column1 should be added to column 2 when inserted and I want to use a trigger but i don't know the syntax to use...
View 14 Replies View RelatedHow can i format my query so that each piece of data appears on a new separate line? Is there a command for a new line feed? does not work.
thanks.
For example:
a: data
b: data
c: data
a: data
b: data
c: data
what the best practice is for creating indexes on columns that are foreign keys to the primary keys of other tables. For example:
[Schools] [Students]
---------------- -----------------
| SchoolId PK|<-. | StudentId PK|
| SchoolName | '--| SchoolId |
---------------- | StudentName |
-----------------
The foreign key above is as:
ALTER TABLE [Students] WITH CHECK ADD CONSTRAINT [FK_Students_Schools]
FOREIGN KEY([SchoolId]) REFERENCES [Schools] ([SchoolId])
What kind of index would ensure best performance for INSERTs/UPDATEs, so that SQL Server can most efficiently check the FK constraints? Would it be simply:
CREATE INDEX IX_Students_SchlId ON Students (SchoolId)
Or
CREATE INDEX IX_Students_SchlId ON Students (SchoolId, StudentId)
In other words, what's best practice for adding an index which best supports a Foreign Key constraint?
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?
I am trying to run a program called NVivo7, which - when I install - also requires installation of SQL Server. Because my C drive is small (and nearly full), I am trying to run NVivo7 off my D drive, though SQL seems to install on C. Is it possible, do you think, to use 2 different drives in this way, or do both the program and the Server need to be on the same one? If so, is there any way to get them both on D?
View 3 Replies View RelatedSo i'm not really new, but got a question. i've recently been looking to to the Western Digital Raptor Drives.
as far as performance, it's always been my understanding that the speed of the hard drive is just about always the bottle-neck of a computer. i'm currently running 2 stripped WD 500gb SATA drives for my SQL server (dual Xeon 2.8 with 2GB memory).
i'm thinking of upgarding to 4 WD Raptors (10k RPM) drives, the new 150GB models. anyone have an opionion? do you think i'll get a large performance increase?
the database that i run queries off of now is about 125 Million names, with about 80 fields in width. so it's rather large, and usally takes a fair abount of time to get my results back (we're talking anywhere from a minute, to half the day.)
do you think the raptors will slim that down significantly?
We recently installed SQL Server 2005. The server has 3 drives. When I try to restore a database I can only access the C: drive. How do I make the D: and E: drives visible in the "locate folder" window?
Hi,
Can someone help me, I installed SQL 2005 Enterpirse Editon on windows clustered servers. Then after the installation
I want to change the path of my DB logs but the problem was, I can not see the other drives. I can see only the drive where the DB was located. Is there any special configurations that should be done.
Thanks.
Russell
Ideally we'd like to configure our SQL cluster w/ the databases on one drive and the logs on another. Is this feasable in a cluster solution.. Will it basically just be 2 drives that are failed over vs. 1?
Thanks
Hi ,
We are having 4 sql7 servers. All are in network only.
serverA: drives c,d
serverB: drives c,e
serverC: drives c,d
serverD: drives c,d,f
Now my question i want map all the drives to each other. So that i can use the space wherever available, because in serverA i dont have space but in ServerC have lot of free space.
Can anyone pls tell me in detail how we have to map the drives.
Thanks
--Siva
Hi, I'm looking for a way to check the free space left on the hard drives and then if needed send an alert to notify when we need to free up some space. I played around with the performance monitor and realized I could do it that way but I think you would have to leave the performance monitor running all the time and I'm not sure if I want to do that. I also read about the xp_fixeddrives proc that displays how much free space is available but then I don't know what to do from there? Does anyone have any recommendations for the best way to do this.
View 3 Replies View RelatedHi,
I mapped a drive on to my SQL Server box. It points to another server from the same domain. When I try to backup or restore a database, I can't see this mapped drive through my SQL Server. Even if I type the entire path, SQL Server wouldn't take it. I don't have a clue about why it is not working. Can anyone throw some light on this. Your help is grately appreciated.
Thanks,
Varma
Hi,
Why we allocate .mdf and .ldf on seperate drives?
Please tell me a proper logical reason behind it.