September 2015
Intermediate to advanced
336 pages
8h 29m
English
Content preview from Pro SQL Server Wait Statistics
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APPENDIX II
Spinlocks
Spinlocks are described by Microsoft as “lightweight synchronization primitives.” The description looks a lot like the one used for latches, which are described as “lightweight synchronization objects.” This is no coincidence, as spinlocks and latches have a lot in common and both are used to serialize access to internal data structures. Both latches and spinlocks are used when access to objects needs to be held for a very short amount of time.
While spinlocks and latches have an identical purpose, there is one large difference between them. Whenever you cannot acquire a latch because there is another, incompatible latch ...
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