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Microsoft® SQL Server 2008 R2 Unleashed
book

Microsoft® SQL Server 2008 R2 Unleashed

by Ray Rankins, Paul Bertucci, Chris Gallelli, Alex T. Silverstein
September 2010
Intermediate to advanced content levelIntermediate to advanced
1704 pages
111h 8m
English
Sams
Content preview from Microsoft® SQL Server 2008 R2 Unleashed

Page-Level Compression

Page-level compression is an implementation of true data compression, using both column prefix and dictionary-based compression. Data is compressed be storing repeating values or common prefixes only once and then referencing those values from other columns and rows. When you implement page compression for a table, row compression is applied as well. Page-level compression offers increased data compression over row-level compression alone but at the expense of greater CPU utilization. It works using these techniques:

• First, row-level data compression is applied to fit as many rows as it can on a single page.

• Next, column prefix compression is run. Essentially, repeating patterns of data at the beginning of the values ...

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Publisher Resources

ISBN: 9780768696585Purchase book