So, I was under the impression that with the online index feature in SQL 2005 would prevent blocking if DML statements occur on the underlying table. I tried to rebuild the indexes on one of our tables that has a lot of traffic, and it caused a ton of blocking statements. Would anyone have any ideas why this would occur?
View 3 RepliesAnyone using the ONLINE=ON option on large DB's? We have a db of 5 GB and we are doing some load testing for SQL 2005. We are modifying the Index scripts for the upgrade. We will run a load with the ONLINE=ON option but just wanted to find out if anyone already is doing it on a similar scale db and has seen any issues?
Also, we have auto-update stats off at the DB level. Does setting the ONLINE=ON require turning this auto-update stats to ON too? I didnt see anything to that effect in BOL, so was wondering.
Thanks for any feedback.
Dinakar Nethi
SQL Server MVP
************************
Life is short. Enjoy it.
************************
http://weblogs.sqlteam.com/dinakar/
Hi all,
In SQL Server 2005 EE I created a maintenance plan to rebuild indexes for a few large tables. I have selected five specific tables, and I'm using both "sort results in tempdb" as well as "keep index online while reindexing".
If I execute this plan for all these tables, are the indexes guaranteed to remain online? There are all different types of indexes on these tables. For example, the table "Contacts" has 8 indexes: 1 Clustered, 1 PK Unique Non-Clustered, 2 Unique Non-Clustered, and 4 Non-Unique Non-Clustered. I've heard that only certain types of indexes can remain online during a reindex (Clustered and Non-Unique Non-Clustered??).
Will SQL Server rebuild an index that isn't compatible with the online reindex mode, or will it choose to ignore it?
Thanks,
- Matt
I'm running SQL Server 2008 R2 with latest patch. I'm performing all index maintenance online. How long the final phase of the index operation takes? Does the size of the index matter and if any blocking occurs, does the duration increase because the size of indexes is larger? I've been told by management, we can not have any downtime, its my understanding even with online index there's a chance blocking can occur in the final phase of the index operation. My database and index size is over 1.5 tb and the number of transaction per second are in the 100's.
View 2 Replies View RelatedTable A
5.6GB
80 million rows
Initial Page Space Used = 85.7% (sys.dm_db_index_physical_stats - avg_page_space_used_in_percent)
Index and data size are almost unchanged after an ONLINE rebuild of the clustered index. Page count actually goes up by 800. No fill factor or pad index settings. Page space used = 99.2%
During an OFFLINE rebuild the page count drops by ~20%. Page space used = 99.8%.
How can the pages be 99.2% used yet the number of pages hasn't gone done from the ONLINE rebuild?
I'm getting the feeling a shortcut was taken somewhere. Does an ONLINE rebuild only reorganize leaf level index pages but not any of the upper levels? Essentially it puts the pages in order but doesn't do any structure consolidation like OFFLINE?
It would seem that you're missing out on some of the benefits of defragmenting if your data is still spread across more pages and you don't get as many rows per read or it takes more reads to go down your tree to get to your data.
I do a lot of index maintenance and started testing rebuilding my indexes with the ONLINE option, but noticed an increase in record size by 14 bytes. The issue I have is that for each index you build the ONLINE option, you add 14 bytes for row. After the index rebuild is done, normal transaction updates drop the additional 14 bytes.
The act of adding and dropping 14 bytes would cause fragmentation and uncompressed data. Is this correct or do I have something wrong?
I have a very large table with approximately 400 million records in it. Every 10 seconds approximately 150 insert are done on the table. I am attempting to rebuild one of the indexes (non-unique, non-clustered). But when I run a script to rebuild the index online (i have enterprise edition) the VB.NET service that is attempting to insert generates SQL timeout errors (timeout set to 30 seconds). From an article on msdn they state that long term table locks are not held for the duration of the index operation. So what am I missing because I am not close to being a DBA. I know SQL Server is not a SCADA but it is not my choice.
Here is the script for one of the rebuilds
USE [DATABASENAME]
GO
ALTER INDEX [IX_REALLY_BIG_TABLE_DT]
ON [dbo].[REALLY_BIG_TABLE] REBUILD
WITH ( PAD_INDEX = OFF,
STATISTICS_NORECOMPUTE = OFF,
ALLOW_ROW_LOCKS = OFF,
ALLOW_PAGE_LOCKS = ON,
SORT_IN_TEMPDB = OFF,
ONLINE = ON )
GO
Here is the article
http://msdn.microsoft.com/en-us/library/ms188388.aspx
Hi ..
Please advice whether i have to do update statistics along with Index rebuild (online /off line)
Thanks in advance
I have Enterprise version of SQL Server 2012 & SQL server 2008. I understand that Image/Text/NText is obsoleted and should not be used. That being said I dont understand why I couldnt rebuild the following clustered index, while I could with nonclustered index, this happens on both SQL 2008 and 2012. Here are the DDL.
CREATE TABLE [dbo].[Demo](
[ID] [int] NOT NULL,
[FK_ID] [uniqueidentifier] NOT NULL,
[SomeColumn] [nvarchar](100) NOT NULL,
[Image] [image] NULL
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
[code]...
An online operation cannot be performed for index 'IX1_Demo' because the index contains column 'Image' of data type text, ntext, image or FILESTREAM. For a non-clustered index, the column could be an include column of the index. For a clustered index, the column could be any column of the table. If DROP_EXISTING is used, the column could be part of a new or old index. The operation must be performed offline.
--Online rebuild works fine on non clustered index
ALTER INDEX IX2_Demo ON Demo REBUILD WITH(ONLINE = ON)--It seems to me that some how having the Image datatype column in the table is an issue. eventhough that column is not part of the index.
We use below OLA script to do our index maintenance and one of our previous engineer designed below script on web edition and I have a question of how online index rebuild works when we have web edition. Does the online Index rebuild really works? I am thinking it only reorganizes and does not do online index rebuild.
sqlcmd -E -S $(ESCAPE_SQUOTE(SRVR)) -d master -Q "
EXECUTE [dbo].[IndexOptimize] @Databases = 'DBName1',
@FragmentationLow = NULL,
@FragmentationMedium = 'INDEX_REORGANIZE,INDEX_REBUILD_ONLINE',
@FragmentationHigh = 'INDEX_REORGANIZE,INDEX_REBUILD_ONLINE',
@FragmentationLevel1 = 5,
@FragmentationLevel2 = 30,
@LogToTable = 'Y'" -b
I was under impression that rebuilding index online largely means that the index will remain available for use during rebuild and my procs and query will be able to use it during rebuild. Also my understanding was that table will be locked very briefly while the schema change will be completing.But when I was rebuilding the clustered index online on a large table with some 3 million records, the table got locked and I was not able even to read the data from it for some 5 minutes. Then I cancelled the operation as it was production server and it was one of our main transaction table.
Is rebuilding index online supposed to work this way? The table has no other index.The parameteres I used are:
REBUILD WITH (PAD_INDEX = ON, SORT_IN_TEMPDB = ON, ONLINE = ON, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 95)
We have SQL cluster installed on top of windows cluster on VM environment. Node1 and Node2 under Windows Failover Cluster. SQL instance is currently on node2 the instance is up and running, but SQL Cluster service remains online pending and it restarts the instance on every 5 minutes.
SQL Browser service are running successfully.TCP/IP ports are enabled and configured.If we start the SQL server agent it is on for seconds and stopped immediately .Cluster Service is attempt to connect to the SQL service every few minutes (setting in SQL cluster resource) for the IsAlive check, if this fails then the SQL resource is restarted even if the instance was online. Hope this is what happening exactly.
[sqsrvres] ODBC Error: [08001] [Microsoft][SQL Server Native Client 11.0]SQL Server Network Interfaces: Error Locating Server/Instance Specified [xFFFFFFFF]. (268435455)
00001024.00053314::2015/10/30-19:57:50.772 ERR [RES] SQL Server <SQL Server (SIMAH_COMMDB)>: [sqsrvres] ODBC Error: [HYT00] [Microsoft][SQL Server Native Client 11.0]Login timeout expired (0)
00001024.00053314::2015/10/30-19:57:50.772 ERR [RES] SQL Server <SQL Server (SIMAH_COMMDB)>: [sqsrvres] ODBC Error: [08001] [Microsoft][SQL Server
Native Client 11.0]A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information see SQL Server Books
Online. (268435455)
00001024.00053314::2015/10/30-19:57:50.772 INFO [RES] SQL Server <SQL Server (SIMAH_COMMDB)>: [sqsrvres] Could not connect to SQL Server (rc -1
please explain the differences btween this logical & phisicall operations that we can see therir graphical icons in execution plan tab in Management Studio
thank you in advance
Hi
I have made a small mistake while restoring the DB I selected the 3rd option in the em
Leave the DB read-only and able to restore additional transactional logs
I have just realized that all I have is a complete back up to restore & no transaction logss...
I see the Db in a Read-only state & when I try to get it online It says
Error 5063 : Db is a warm standby. A warm standby db is read-only
Alter DB statement failed.
sp_dboption command failed
Please Help
I am using Full Text Index to index emails stored in BLOB column in a table. Index process parses stored emails, and, if there is one or more files attached to the email these documents get indexed too. In result when I'm querying the full text index for a word or phrase I am getting reference to the email containing the word of phrase if interest if the word was used in the email body OR if it was used in any document attached to the email.
How to distinguish in a Full Text query that the result came from an embedded document rather than from "main" document? Or if that's not possible how to disable indexing of embedded documents?
My goal is either to give a user an option if he or she wants to search emails (email bodies only) OR emails AND documents attached to them, or at least clearly indicate in the returned result the real source where the word or phrase has been found.
Dear All.
We had Teradata 4700 SMP. We have moved data from TD to MS_SQL SERVER 2003. records are 19.65 Millions.
table is >> Order_Dtl
Columns are:-
Client_ID varchar 10
Order_ID varchar 50
Order_Sub_ID decimal
.....
...
..
.
Pk is (ClientID+OrderId+OrderSubID)
Web Base application or PDA devices use to initiate the order from all over the country. The issue is this table is not Partioned but good HP with 30 GB RAM is installed. this is main table that receive 18,0000 hits or more. All brokers and users are using this table to see the status of their order.
The always search by OrderID, or ClientID or order_SubNo, or enter any two like (Client_ID+Order_Sub_ID) or any combination.
Query takes to much time when ever server receive more querys. some orther indexes are also created on the same table like (OrderDate, OrdCreate Date and Status)
My Question are:-
Q1. IF Person "A" query to DB on Client_ID, then what Index will use ? (If any one do Query on any two combination like Client_ID+Order_ID, So what index will be uesd.? How does MS-SQL SERVER deal with these kind of issues.?
Q2. If i create 3 more indexes on ClientID, ORderID and OrdersubID. will this improve the performance of query.if person "A" search record on orderNo so what index will be used. (Mind it their would be 3 seprate indexes for Each PK columns) and composite-Clustered index is also available.?
Q3. I want to check what indexes has been used? on what search?
Q4. How can i check what table was populated when, or last date of update (DML)?
My Limitation is i Dont Create a Partioned table. I dont have permission to do it.
In Teradata we had more than 4 tb record of CRM data with no issue. i am not new baby in db line but not expert in sql server 2003.
I am thank u to all who read or reply.
Arshad
Manager Database
Esoulconsultancy.com
(Teradata Master)
10g OCP
My SSIS package is running very slow taking so much time to execute, One task is taking 2hr for inserting 100k records, i have disabled unused index still it is taking time.I am rebuilding/Refreshing indexes and stats once in month if i try to execute on daily basis will it improve my SSIS Package performance?
View 2 Replies View RelatedKeep getting this error when positioning to the last page of a report.
Using Server 2003...SqlRpt Svcs 2000 sp2
Detail error msg:
Exception of type Microsoft.ReportingServices.ReportRendering.ReportRenderingException was thrown. (rrRenderingError) Get Online Help
Exception of type Microsoft.ReportingServices.ReportRendering.ReportRenderingException was thrown.
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
Anyone have any suggestions? Any way to find out what collection is blowing?...or where parameter name: index comes from?
I know MMORPGs take tons of special servers, but what about a simple 2D minorly-multiplayer online game, say with 3-5 players- could that be run through an SQL database or is it still too slow?
View 2 Replies View RelatedHi,
I'm looking for a good reference guide online as I am more used to mysql (and stil quite limited vocab at that)
I create table outside of a database by accident and I'm now looking for the sql syntaxt for moving tables, but I can't find it anywhere?
most simple guides don't seem to provide the syntax to do this. :(
Can someone share with me their experience or thougts on whether it is better to :
1) backup db to the disk first, then to the tape OR
2) use online backup which backup the database on realtime basis to the tape.
Any excellent software for online backup?
Can anyone tell me how I would go about making my SQL server accessable from the Internet, or know of any good tutorials to get me started, I haven't had much luck looking on google.
I need to access an SQL database from one server on another server for a web application.
Thanks
Dear fellows,
I need online database tutor whom I can pay and he makes my database concepts from scratch. Is there any such facility available
Regards
Hi,
I have started to learn SQL, I need to practise those commands through online sql interpreter. Is there any web page available to do so? or where can i down load it for free?
How do you use BOL? I've heard time again that there is much info in BOL but when i look at it it seems too brief and not detailed. I find it hard to find what i'm looking for anyway. How do you use it?
Thanks!
Hello all! Im new to SQL2005. If it is possible to see realtime graphs from tables? For example current sales result?
Thanx
Dear Friends,I don't know anybody has asked this question before or not.But I needa support urgently.How to take online backup in MS Sql server 2000.ThanksArijit Chatterjee
View 2 Replies View RelatedHi need to something like this:
"alter database modify file (name=<name>, ONLINE)",
but it isn't possible.
Here what I did:
alter database bdj add file (name ='bdjfg1', filename='d:db
djfg1.ndf' )
to filegroup bdjfg;
alter database bdj modify file (name='bdjfg1', OFFLINE);
alter database bdj modify file (name ='bdjfg1', filename='d:db
ewdestdjfg1.ndf' );
--Msg 5056, Level 16, State 4, Line 1
--Cannot add, remove, or modify a file in filegroup 'bdjfg' because
the filegroup is offline.
alter database bdj modify filegroup bdjfg READWRITE;
--Msg 5056, Level 16, State 3, Line 1
--Cannot add, remove, or modify a file in filegroup 'bdjfg' because
the filegroup is offline.
Yes, yes and should have read the cautions section saying:
"Use this option only when the file is corrupted and can be restored. A file set to OFFLINE can only
be set online by restoring the file from backup. For more information about restoring a single file,
see RESTORE (Transact-SQL)."
But I have not an backup of the datafile, but I have the datafile itself!
What can I do to get it online again, the old location could be fine, but it would be better on an new location (thats is the reason for all the trouble, the original drive has not much space left, so I wanted to move the datafile)
What can I do, HELP
/Bjorn
hello friends
i have table1 and 200 coulumn of table1 :) i have 647.600 records. i entered my records to table1 with for step to code lines in one day :)
i select category1 category2 and category3 with select code but i have just one index.. it is productnumber and it is primarykey..So my select code lines is so slow.. it is 7-9 second.. how can i select in 0.1 second ? Should i create index for category1 and category2 and category3 ? But i dont know create index.. My select code lines is below.. Could you learn me and show me index for it ?? or Could you learn me and show me fast Select code lines and index or etc ??? Also my search code line have a dangerous releated to attaching table1 with hackers :)
cheersi send 3 value of treview1 node and childnode and child.childnode to below page.aspx :)
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Me.IsPostBack Then
If Request("TextBox1") IsNot Nothing ThenTextBox1.Text = Request("TextBox1")
End If
If Request("TextBox2") IsNot Nothing ThenTextBox2.Text = Request("TextBox2")
End If
If Request("TextBox3") IsNot Nothing ThenTextBox3.Text = Request("TextBox3")
End If
End If
Dim searchword As String
If Request("TextBox3") = "" And Request("TextBox2") = "" Then
searchword = "Select * from urunlistesi where kategori= '" & Request("TextBox1") & "'"
End If
If Request("TextBox3") = "" Then
searchword = "Select * from urunlistesi where kategori= '" & Request("TextBox1") & "' and kategori1= '" & Request("TextBox2") & "'"
End If
If Request("TextBox3") <> "" And Request("TextBox2") <> "" And Request("TextBox1") <> "" Then
searchword = "Select * from urunlistesi where kategori= '" & Request("TextBox1") & "' and kategori1= '" & Request("TextBox2") & "' and kategori2= '" & Request("TextBox3") & "'"
End If
SqlDataSource1.SelectCommand = searchword
End Sub
Hi,
I'm running a merge replication on a sql2k machine to 6 sql2k subscribers.
Since a few day's only one of the merge agents fail's with the following error:
The merge process could not retrieve generation information at the 'Subscriber'.
The index entry for row ID was not found in index ID 3, of table 357576312, in database 'PBB006'.
All DBCC CHECKDB command's return 0 errors :confused:
I'm not sure if the table that's referred to in the message is on the distribution side or the subscribers side? A select * from sysobjects where id=357576312 gives different results on both sides . .
Any ideas as to what is causing this error?
Hi everyone,
When we create a clustered index firstly, and then is it advantageous to create another index which is nonclustered ??
In my opinion, yes it is. Because, since we use clustered index first, our rows are sorted and so while using nonclustered index on this data file, finding adress of the record on this sorted data is really easier than finding adress of the record on unsorted data, is not it ??
Thanks
Hi all; I am trying to login to an online sql database from enterprise manager;
First of all is this possible and second of all, how do I go about doing it from enterprise manager (by the way I am using MS SQL 2000)
THanks for any assistance
Hi,
I hope i'm in the right forum. Is there a way to create a DB diagram schema via ASP/HTML and publish it on-line - keeping it up-to-date?
I want to at least output a diagram schema to HTML format? Any ideas. TIA!