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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Allocation Consistency Checks
These checks verify the contents of and relationships between the various structures that track page and extent allocations in the database. The structures involved are as follows:
PFS pages, which track the allocation status of individual pages within a 64-MB section of a data file (a PFS interval)
GAM pages, which track the allocation status of all extents within a 4-GB section of a data file (a GAM interval)
SGAM pages, which track all mixed extents that have at least one page available for allocation with a GAM interval
IAM pages, which track all pages and extents allocated to an allocation unit from a GAM interval
IAM chains, which are a linked-list of all IAM pages for an allocation unit (and hence track all pages ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.