upc internet hungary Microsoft SQL Server 2008 Internals in Visual Basic .NET

Maker UPC-A Supplement 2 in Visual Basic .NET Microsoft SQL Server 2008 Internals

Microsoft SQL Server 2008 Internals
Painting UPC-A Supplement 5 In Visual Basic .NET
Using Barcode generator for Visual Studio .NET Control to generate, create UPC Symbol image in VS .NET applications.
www.OnBarcode.com
Scanning GS1 - 12 In Visual Basic .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Automatic Shrinking of the Log
Barcode Generator In VB.NET
Using Barcode generator for .NET Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
Bar Code Decoder In Visual Basic .NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Remember that truncating is not shrinking. A database should be truncated so that it is most shrinkable, and if the log is in autotruncate mode and the autoshrink option is set, the log is physically shrunk at regular intervals. If a database has the autoshrink option on, an autoshrink process kicks in every 30 minutes (as discussed in 3) and determines the size to which the log should be shrunk. The log manager accumulates statistics on the maximum amount of log space used in the 30-minute interval between autoshrink processes. The autoshrink process marks the shrinkpoint of the log as 125 percent of the maximum log space actually used or the minimum size of the log, whichever is larger. (Minimum size is the creation size of the log or the size to which it has been manually increased or decreased.) The log then shrinks to that size whenever it gets the chance, which is when it gets truncated or backed up. It s possible to have autoshrink without having the database in autotruncate mode, although you cannot guarantee that the log actually shrinks. For example, if the log is never backed up, none of the VLFs are marked as reusable, so no shrinking can take place. As a nal note, you need to be aware that just because a database is in autotruncate mode, you cannot guarantee that the log won t grow. (It is the converse that you can be sure of that if a database is not in autotruncate mode, the log will grow.) Autotruncate means only that VLFs that are considered recoverable are marked as reusable at regular intervals. But VLFs in an active state are not affected. If you have a long-running transaction (which might be a transaction that someone forgot to commit), all the VLFs that contain any log records since that long-running transaction started are considered active and can never be reused. One uncommitted transaction can mean the difference between a very manageable transaction log size and a log that uses more disk space than the database itself and continues to grow.
Generate UPC-A Supplement 2 In Visual C#
Using Barcode generator for Visual Studio .NET Control to generate, create UPC-A Supplement 5 image in .NET framework applications.
www.OnBarcode.com
Make GTIN - 12 In .NET
Using Barcode generator for ASP.NET Control to generate, create UCC - 12 image in ASP.NET applications.
www.OnBarcode.com
Log File Size
UCC - 12 Generator In .NET
Using Barcode creator for .NET Control to generate, create UPC-A Supplement 5 image in Visual Studio .NET applications.
www.OnBarcode.com
Barcode Generator In VB.NET
Using Barcode maker for .NET Control to generate, create barcode image in VS .NET applications.
www.OnBarcode.com
You can see the current size of the log le for all databases, as well as the percentage of the log le space that has been used, by running the command DBCC SQLPERF( logspace ). However, because it is a DBCC command, it s hard to lter the rows to get just the rows for a single database. Instead, you can use the dynamic management view sys.dm_os_performance_counters and retrieve the percentage full for each database s log:
Print Barcode In VB.NET
Using Barcode creator for VS .NET Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
Create 2D Barcode In VB.NET
Using Barcode generation for .NET Control to generate, create Matrix 2D Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
SELECT instance_name as [Database], cntr_value as "LogFullPct" FROM sys.dm_os_performance_counters WHERE counter_name LIKE 'Percent Log Used%' AND instance_name not in ('_Total', mssqlsystemresource') AND cntr_value > 0;
Create Data Matrix In Visual Basic .NET
Using Barcode printer for .NET framework Control to generate, create ECC200 image in Visual Studio .NET applications.
www.OnBarcode.com
Identcode Creation In Visual Basic .NET
Using Barcode drawer for .NET Control to generate, create Identcode image in VS .NET applications.
www.OnBarcode.com
The nal condition is needed to lter out databases that have no log le size reported. This includes any database that is unavailable because it has not been recovered or is in a suspect state, as well as any database snapshots, which have no transaction log.
Printing European Article Number 13 In Java
Using Barcode creator for Eclipse BIRT Control to generate, create EAN-13 image in BIRT reports applications.
www.OnBarcode.com
UCC - 12 Scanner In Visual Basic .NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
4
Making ECC200 In Java
Using Barcode drawer for Java Control to generate, create Data Matrix ECC200 image in Java applications.
www.OnBarcode.com
Decoding UPC Code In .NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Logging and Recovery
Universal Product Code Version A Encoder In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create UPC Symbol image in ASP.NET applications.
www.OnBarcode.com
Paint Data Matrix ECC200 In None
Using Barcode drawer for Font Control to generate, create Data Matrix image in Font applications.
www.OnBarcode.com
Backing Up and Restoring a Database
Drawing Code-39 In Java
Using Barcode encoder for Android Control to generate, create Code39 image in Android applications.
www.OnBarcode.com
Paint GS1-128 In None
Using Barcode creation for Office Excel Control to generate, create UCC.EAN - 128 image in Office Excel applications.
www.OnBarcode.com
As you probably know by now, this book is not intended to be a how-to book for database administrators. The bibliography in the companion content lists several excellent books that can teach you the mechanics of making database backups and restoring and can offer best practices for setting up a backup-and-restore plan for your organization. Nevertheless, some important issues relating to backup and restore processes can help you understand why one backup plan might be better suited to your needs than another. Most of these issues involve the role the transaction log plays in backup and restore operations, so I ll discuss the main ones in this section.
Copyright © OnBarcode.com . All rights reserved.