The following table presents the lock requests by transactions T1, T2, T3, and T4. S(.) and X(.) stand for 'shared lock' and exclusive lock', respectively. To prevent deadlocks, use a lock manager that uses the Wait-Die policy. Assume the four transactions have priority: T1< T2
The following table presents the lock requests by transactions T1, T2, T3, and T4. S(.) and X(.) stand for 'shared lock' and exclusive lock', respectively. To prevent deadlocks, use a lock manager that uses the Wait-Die policy. Assume the four transactions have priority: T1< T2
Chapter5: Data Manipulation And Transaction Control
Section: Chapter Questions
Problem 4RQ
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