Podcast
Questions and Answers
On a successful validation, transactions are restarted.
False
The granularity of data items has no effect on concurrency control performance.
False
Coarse granularity leads to high concurrency.
False
A disk block is an example of fine granularity.
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Intention-shared locks are used to indicate that an exclusive lock will be requested on some descendent nodes.
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Multiple granularity locking is used to manage a flat hierarchy of granularity.
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A shared-intention-exclusive lock is used to indicate that the current node is locked in exclusive mode but a shared lock(s) will be requested on some descendent nodes(s).
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Intention-exclusive locks are used to indicate that a shared lock(s) will be requested on some descendent nodes(s).
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The entire database is an example of fine granularity.
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Multiple granularity locking is used to manage a hierarchy of granularity from fine (record) to coarse (database).
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