March 2009
Intermediate to advanced
784 pages
30h 30m
English
book
Microsoft® SQL Server® 2008 Internals
by Paul Randal Kalen Delaney Kimberly Tripp, and Conor Cunningham
Content preview from Microsoft® SQL Server® 2008 InternalsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Processing the Database Efficiently
A database can be thought of as one giant, interconnected structure with all tables linked back to system catalogs, and all system catalogs linked back to the lowest-level allocation metadata stored in sys.sysallocunits, which in turn has its first page fixed at page (1:16) in every database. With the addition of the fixed-location allocation bitmaps, such as Page Free Space (PFS) and Global Allocation Map (GAM) pages, the entire database can be represented as a single entity-relationship diagram.
With this thought in mind, one can envisage a consistency-checking algorithm for this metastructure that starts with page (1:16) and the allocation bitmaps and progressively expands into the database-checking linkages ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.