Rebuild Replicated Indexes
Jun 14, 2006
I have a number of databases that are being transactionally replicated from SQL 2000 Enterprise edition publisher to SQL 2005 Enterprise edition subscriber. I have included indexes in the replication. The subscriber database is then accessed and the data de-normalised and aggregated for reporting purposes.
My question is this: I want to periodically re-build the indexes on the publisher and subscriber via an automated task. If I rebuild the indexes on the publisher, will that automatically replicate to the subscriber? Will there be a problem with the "snapshot being out of date", and therefore replication stopping? I run a new snapshot once a day in the small hours of the morning. If there is likely to be a problem with the rebuild throwing the replication out, would it be wise to have the rebuild job running just before the new snapshot is taken?
Any help/advice appreciated.
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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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Oct 8, 2001
Hi All,
SQL 7 REQUIRES THE DBA TO MANAGE THE INDEXES AND IN PARTICULAR THE FILL FACTOR AVAILABILITY. DOES SQL SERVER 2000 AUTOMATICALLY ADDRESS THIS OR DO WE STILL HAVE TO PERIODICALLY RUN,
sp_MSforeachtable @command1="print '?' DBCC DBREINDEX ('?')"
TO REBUILD ALL INDEXES IN THE DATABASE?
Thanks in advance,
-Praveena
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Apr 1, 2008
Hi!
I'm not a dba at all, just a simple developer but I have got the assignment to help out with performance problems on a db.
I noticed that almost all indexes are fragmented 75-99%. Can I rebuild them when the database is in use? Can I reorganize indexes when the db is used?
/Magnus
Jesus saves. But Gretzky slaps in the rebound.
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Sep 11, 2007
In the maintance plans there is a Rebuild Index choice.
If u choose tables and views the plan executes
ALTER INDEX <index> ON <table> ;REBUILD
for all indexes in the datebase.
I am currently using this plan on our production DB, scheduled for every Saturday night.
I wonder if there is a downside of using maintance plans. Because it seems to be doing the job. Any comments?
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Dec 17, 2007
I am upgrading from SQL2000 to SQL2005.
I have restored my 2000 db to 2005.
I have changed the Compatiblilty level to 90.
Now I need to reindex.
How do I reindex all the tables at once?
Thanks for ALL your help
r/p
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Nov 12, 2006
how can run a command to rebuild all indexes in a database?
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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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Dec 19, 2001
I need to drop and recreate indexes in some of my tables that are currently been replicated. I am not sure how this will affect my ongoing replication. Will this cause a problem for me? Please help
Bright
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Sep 21, 2015
We have a script running everyday for rebuild and re-organisation of indexes. But, somehow its getting failed. Attached script for your consideration. There is no database name with amoperations. There is table called DatabaseObjectAudit but it exist on master db.
Message:
-->Start Index Maint
-> Gathering fragmentation information (can take a while!)
-> Gathering COMPLETE : Total of 43 databases were found.
-> Gathering COMPLETE : Total of 1622 indexes were found.
[code]...
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Oct 4, 2007
Hi All.
Our inhouse app used to run on a SQL2000, but we've recently moved it to 2005.
The move was done by way of backup and restore (it was on a whole new server).
After the move, an odd problem showed up: once in a while, the server seems incapable of finding/using its indexes: everything starts working slowly, until I run a maintenance plan that rebuilds its indexes etc.
In the database/server all relevant options seem to be ok (auto update statictiscs etc.), and my conclusion that it doesn't use its indexes comes from the fact that:
* it gives the results from certain select statements in a totally different order (although the set of rows is the same),
* performance is (all of a sudden) very slow (seconds turning to minutes!!)
This happens:
* at least after a reboot of the server
* sometimes just in the middle of the day
The only way I've found to solve the matter, is by running the maintenance plan to rebuild the indexes, but sometimes this only seems to work the second time.
Does anybody share this experience, or know what to do about it?
Thanks,
Nick.
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Sep 28, 2015
We are planning to standardize our newly deployed sql server, As a part of it we have configured 2 maintenance plans 1) Update Statistics which runs daily and 2) Index Reorganize which runs on weekly.
Apart from above, any other things to be in place for better maintenance of the sql server.
Also, how to Index Rebuild activity for clustered indexes requires any downtime.
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Mar 25, 2008
Hi,
I have a script to rebuild and reorganize indexes for sybase i.e reorg rebuild index... like command i have. Now i want similar command for MSSQLSqlserver.plz help me.
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Jul 27, 2015
Do I need to rebuild my indexes on my High Availability listeners?
When I do a full index rebuild on my primary DB's. Does rebuilding also send the rebuild to the listener(s)?
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Jul 9, 2015
I am using SQL Server 2008 (RTM) Standard Edition.
In my environment, one of my Database size is 75 gb and I have to create a plan for index rebuild using maintenance plan.But when we rebuild indexes, it requires some space on data and log files of database.how can we calculate disk space requirement for index rebuild process ?
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Sep 16, 2015
We have a maintenance plan running everyday for rebuild and re-organisation of indexes. But, somehow its getting failed. Here is the script that we are running for rebuild or re-org.
/*
Script to handle index maintenance
Tuning constants are set in-line current values are;
SET @MinFragmentation
SET @MaxFragmentation
SET @TrivialPageCount
[code]....
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Nov 5, 2015
If I rebuild some indexes that are above 30% of average fragmentation, should I after that update statistics?
Also, How can I see if I Need to update statistics^on the tables of my database?
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Aug 23, 2015
Normally we use rebuild, reorganize indexes when it is required, I used a SQL job using maintenance plan to run daily and rebuild, reorganize indexes and update statistics but I do not know if it runs either they are required or not. Should this plan automatically execute the build upon required indexes to be rebuild or it fires either they are required to be executed or not.
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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
What is the difference please?
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Jul 31, 2007
Is there anyway to tell when records have been replicated to another device from SQL Server? I realize I can see it by looking in the distribution table, but I want to do it from a different database, so I cant access the distribution database from that DB. Any help would be much appreciated.
Thanks,
Nick
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May 1, 2007
Hello,
In our environment (SQL 2005) we have a database that uses Transactional Replication to sync data between two SQL 2005 servers. There is a web app that reads/writes data to the publisher server and the other server (that gets the replicated data) is used by some other internal applications.
At times, there is a need to delete some data from the publisher server...but this can ONLY happen once the data has been successfully replicated to the second server. Is there any way to determine if a row has been replicated successfully?
thanks
- will
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Jan 21, 2007
I have an application that uses web-based merge replication. My publisher is SQL 2005 and my subscriber is SQL 2005 Express. I control the replication with RMO code. If I make changes to the data in both databases using SQL Server Management Studio Express, my RMO code correctly syncs the two databases. However if I make changes to the data at the subscription through my application, these changes are not picked up by the replication process, even though the changes are present if you check the tables through Management Studio. What would cause these changes to not be recognized? Any ideas would be appreciated.
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Jan 4, 2000
Hi,
I am trying to figure out a way to link a MySQL database (running on Linux) to my MSSQL7 database. My ultimate goal is to synchronize inserted/updated/deleted data in the MSSQL7 DB to the MySQL DB.
I have tried a few things and have had a few ideas. They are:
1) Create table triggers in the MSSQL7 DB that will synchronize the data to the MySQL DB. I can't figure out how to run Transact/SQL statements (INSERT, UPDATE, DELETE, etc.) into an ODBC DSN pointing to the MySQL DB. I think this could be done with a linked server (see next item).
2) Add a linked server under Security->Linked Servers in the MSSQL7 Enterprise Manager. I have managed to get the remote MySQL server to link in here. I can even see the table names in the server browser, so that's encouraging! However, I cannot figure out the syntax of the fully-qualified table names in my SELECT statements. I have tried this:
SELECT * from LinuxBox..MyDB.MyTable
-and-
SELECT * from LinuxBox.MyDB.MyDB.MyTable
but I get:
Server: Msg 7312, Level 16, State 1, Line 1
Invalid use of schema and/or catalog for OLE DB provider 'MSDASQL'. A four-part name was supplied, but the provider does not expose the necessary interfaces to use a catalog and/or schema.
This statement:
SELECT * from LinuxBox...MyTable;
gives me:
Server: Msg 7313, Level 16, State 1, Line 1
Invalid schema or catalog specified for provider 'MSDASQL'.
Since I can see the table names in the linked server browser in Enterprise Manager, though, some kind of connection must be active. I just need to figure out how to refer to the remote tables.
A big problem is that when I supply a catalog name while defining the linked server, I get an error message from the Enterprise Manager:
Error 7399: OLE DB provider 'MSDASQL' reported an error. The provider reported an unexpected catastrophic failure.
Therefore, I can't define a catalog with the linked server. I think a catalog is required for the "4-part name" to work in the SELECT statement above.
3) Write an extended stored procedure that uses the ODBC function library to make a connection to the MySQL DSN and have a table trigger call the ESP. Hoping to be able to do something simpler than this!
Any suggestions would be greatly appreciated!
Thanks,
Greg
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Sep 2, 2005
Hi,
We have to move two of our servers in US hosting SQL Server 2000 database to different location. These servers are clustered using MSCS and uses SAN to store database data. The database on this cluster hosts publisher and distributor. The other two sites in Europe host updateable subscribers. We are using transactional replication. The downtime will be around 24 hours during which servers will be physically moved from one location to other. During this time we will keep the two subscribers running and let the changes queued on subscribers. I have listed following steps based on my limited knowledge of SQL Server. Could somebody please advise if this approach is valid and if I have missed any steps?
1. Make sure no users are accessing database
2. Backup database (In case of emergency need)
3. Stop snapshot, Log Reader, Queue Reader and Distributor Agents
4. Stop SQL Server Service and SQL Agent
5. Take OS backup
5. Shutdown the server
6. Ship the servers and OS backup to new location
7. Setup servers at new location and restore OS backup
8. Start SQL Server Service and SQL Agent
9. Start agents listed in step 3
Regards,
Nilesh
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May 8, 2006
I got Server A with 30 Databases and I was asked to move 30 databases to Server B…
But server A is having 2 databases as Publication and Distribution to two different servers….. and Server A is a subscription for 6 Databases from other servers….
Once I move the databases from Server A to Server B…… what is the best way to get the Replications too…. I mean Server B should have 2 Db’s as Pub & Distr and 6 Db’s as Subscription…
Is there any way I can script it out in Server A and run the same script in Server B with some modification…. so that the Replication work…..??
I have Jobs and Maintenance plans…. Which should also move from Server A to Server B…. I know using DTS...... is there any better way..??
Please some one give me ur suggestion on this…
Thanks
Bob
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Aug 21, 2007
I've got 2 servers and they are using replication to synch the data from one to other.
I've got a Full Text Catalog on a table on both servers.
- I repopulate the catalogs completely on both servers(now remember that the base tables of those catalogs are under replication and are exactly the same!!)
-When I run the exact same qquery against the 2 databases using the Full Text Catalogs I'd just finished rebuilding, I get a different number of results returned in my result set on one then I do on the other...
How the heck could this be possible?
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Jun 22, 2004
Is there any query to find out all the tables without a Primary key or without a Unique index ?
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Mar 3, 2004
I have a database A on server_1 that is being merge replicated to database B on server_2 which is production a box
NOW
I want to restore database A on server_3 that is being merge replicated to database B on Server_4 which is test box.
How about do I do that with replication being involved?
Thanx
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Jun 19, 2008
Dear All,
i've made repliaction stup using the information guide below. all the things are done axactly. now i've inserted a row in the publisher. but i'm not getting the record at the subscriber database. please let me know where i'm missing
http://blog.csdn.net/longrujun/archive/2006/06/09/783357.aspx
Arnav
Even you learn 1%, Learn it with 100% confidence.
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Sep 20, 2007
Hope to be my last question.
I used Transacational with update sub method. When adding new column to replicated table. Do I need to generate new snapshot again? Just want to know how can I apply the new schema to subsciber DB without doing all regenerate snapshot, recreate all tables and bulk copy.. Please help
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Jul 23, 2005
I hosed myself, please help me somebody.We have a development server (SQL7) where the database is a restored copy ofproduction (where we use replication, but not in the developmentenvironment).While we rebuild the server recently (so we could move off of NT onto 2000),everything looked to be working fine.But I recently, messed up and did a massive update filling the transactionlog of the development server. Now I can't update data in development.I tried to do my usual:BACKUP LOG LAMS WITH Truncate_onlyonly to get a message:The log was not truncated because records at the beginning of the log arepending replication. Ensure the Log Reader Agent is running or usesp_repldone to mark transactions as distributed.Did a little research into BOL and tried to call the following two procs:exec sp_repldone@xactid = null ,@xact_seqno = null ,@reset = 1exec sp_repltransBoth of which gave me an error of :The database is not published.Which it isn't as we don't run replication in the development environment.I stopped and restarted the SQL Service (as that has cleared issues in thepast), but didn't reboot the server.How can I make the database not think It's replicated (or that its caughtup?).I was thinking, would I be even be able to do another restore of a morerecent copy of Production?Sincerely ...Depressed in Delaware
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