How do I shrink my SQL Server Database? - Stack Overflow
Your original db (as long as you don't delete your DB when dropping it!) is safe, the new DB will be roughly as small as it can be, and you'll have two different snapshots of your current database - one ready to roll, one minified - you can choose from to back up. But the bigger question in my mind when reading this question about shrinking the data file (or even the log file) is why? and what bad things happen when you try? It appears as though shrink operations were done
Why UniqueIdentifier is a Bad Choice for a Clustered Index in SQL Server - SQLServerCentral
Are there other methods than what I have noted above that you have used to ensure integrity between disconnected systems (using replication or another sync process)? -Brice Posted by Steven Willis on 30 March 2010 In a case where I really needed to use a guid as a primary key, I have used Jimmy Nilsson's method mentioned above. Posted by peter.row on 30 March 2010 It's a shame that this is the case because from object oriented development point of view it would be nice if you could generate a guid in code and pass that with the other data when saving to the database instead of having to use an output parameter to get the auto-generated ID from SQL Server
The number of pages in the leaf level of an index depends on the number of rows and the size of the rows (again, in terms of bytes) of the rows in the leaf level. Poor page density reflects that your pages are not as full as they could be but there are many factors for why this is the case: bad row size, splits due to inserts, splits due to updates of varchar columns or even a poorly chosen fillfactor that has left too much space on the pages
sql-server self-join asked 8 mins ago Adarsh K 50451133 0 votes 1answer 30 views Copy of certain fields from one table to another in MSSQL I am trying to accomplish a copy of some row's fields from one table to another. sql-server sapb1 asked 55 mins ago Andrei I 10.7k21850 0 votes 1answer 31 views Count one cross join, sum another inside T-SQL I am trying to write a query for our incident management software that will report, for each engineer, the number of request they closed today and the time logged on actions today
The SQL Server and .NET Blog: How to rebuild all the indexes of a database in SQL Server
http://aartemiou.blogspot.com/2009/06/how-to-rebuild-all-indexes-of-database.htmlTo this end, in the worst scenario, the DBA will need to rebuild the indexes in all the tables of the database.My previous post on the topic explained ways of rebuilding specific or all the indexes within a table.Under normal circumstances there is not a direct way allowing to rebuild all the indexes of a database with a single command. Hi Suresh,When you rebuild indexes Online, the underlying tables and associated indexes are available for queries and data modification during the index operation
So, for example, the EXECUTE statement in Listing 1 tells IndexOptimize to rebuild indexes that are more than 30 percent fragmented, online if possible (no LOBs). When you call this stored procedure, it creates a backup directory, performs a database backup, verifies the backup file, then deletes any old backup file for each database you specify
sqlfingers.com: Find the unused database tables in SQL Server
Concatenate values with FOR XML PATH In this example I will show you how to use the FOR XML PATH clause to perform row concatenation, in v2005 and v2008
Number of voluntary and involuntary DBAs , developers working on SQL databases keep ticking every day and the main intent of this website is to help and educate each of those out in the field and new database professionals starting their venture with the SQL server
SQL Server clustered index high fragmentation - Database Administrators Stack Exchange
I tested each fill factor setting on a newly created table with 2000 inserts (and the 3+ updates) there is no select or update which does not include the primary key in the query. In general, though, you only need to concern yourself with fragmentation when all of these factors are true: The index is large enough that randomly reading the pages (extents) is too slow (choose your own definition of what "too slow" means) The index will be scanned The index pages (extents) will be physically read from disk (i.e., they are not already in the buffer pool) The storage subsystem is poor at handling random reads (i.e., spindle-based, and the bytes won't come out of cache) I would recommend, however, putting in place a solid index maintenance solution to keep things more or less in check
SQL Server 2008 Table Maintenance - Rebuild, Reorganize, Update Stats, Check Integrity etc - Database Administrators Stack Exchange
Use maintenance plans for now, once you become a little comfortable with the process of doing maintenance, switch to using scripts, running scheduled SQL agent jobs
Identify Missing Indexes Using SQL Server DMVs - SQL Server Performance
The role of DMVs is to return SQL Server state information; which can be used by database administrators and database developers to monitor the health of an SQL Server Instance and identify potential performance issues. To keep the information for later use, the DBA needs to backup all the data available within all the missing index DMV prior to the restart of SQL Server
Colin is a proud PASS member, President of EDMPASS (The Edmonton Chapter of PASS), and has recently co-authored a book on SQL Server 2008 Policy Based Management
Once I re-added a Clustered index on the large table, the free space was returned and I was able to then shrink and then reorganize to get back in the game. The reason I shrink is that those databases have some tables filling up with log entries that I also regularly delete, so there is unused space in them
SQL Server Index Fragmentation and Its Resolution - SQL Server Performance
How to Determine If an Index is Fragmented? SQL Server provides a database command, DBCC SHOWCONTIG, to use to determine if a particular table or index has fragmentation. While this may be an advantage on an application with heavy data inserts, setting a fill factor causes space to be left on index pages, severe internal fragmentation can lead to increased index size and cause additional reads to be performed to return needed data
Is it now a case of the stats being unreliable, or the REBUILD not being effective? I do not want to be in the situation where we miss indexes because of unreliable stats. Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account
Step 3: SQL Server Management Studio will generate a report showing information about the Table Names, Index Names, Index Type, Number of Partitions and Operation Recommendations. Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account
On SSDs, the benefits of contiguity only really extend to the per drive stripe unit size, because each stripe unit is randomly placed within the drive regardless of its positioning within the filesystem or database. The difference between physically fragmented disk throughput and physically unfragmented disk throughput is miniscule compared to the speed difference between memory and disk
Following the book analogy, it is like having a book where pages are not ordered in a logical way (page 1, then page 2, then page 3 and so on) causing you to go back and forward to compound the information and make sense of the reading. It is like having a book where some of the pages are left blank; we do not know what pages are blank until we read the entire book and same applies for SQL Server, which has to read all the pages in the index wasting extra-time and server resources in the empty pages
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