October 2006
Intermediate to advanced
464 pages
16h 11m
English
Content preview from Inside Microsoft® SQL Server™ 2005, Fourth EditionBecome 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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Changes in Log Size
No matter how many physical files have been defined for the transaction log, SQL Server always treats the log as one contiguous stream. For example, when the DBCC SHRINKDATABASE command (discussed in Chapter 4) determines how much the log can be shrunk, it does not consider the log files separately but instead determines the shrinkable size based on the entire log.
Virtual Log Files
The transaction log for any database is managed as a set of virtual log files (VLFs) whose size is determined internally by SQL Server based on the total size of all the log files and the growth increment used when enlarging the log. When a log file is first created, it always has between 4 and 16 VLFs. A log always grows in units of entire VLFs and ...
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