What is a deadlock and what is a live lock? How will you go
about resolving deadlocks?
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Answer Posted / kkkkkk
Deadlock is a situation when two processes, each having a
lock on one piece of data, attempt to acquire a lock on the
other's piece. Each process would wait indefinitely for
the other to release the lock, unless one of the user
processes is terminated. SQL Server detects deadlocks and
terminates one user's processDeak Lock is a situation when two or more process
continuous working and each having a lock on a particular
record but at a time only one can lock a particular and the
other one will go to dead lock.
A livelock is one, where a request for an exclusive lock
is repeatedly denied because a series of overlapping shared
locks keeps interfering. SQL Server detects the situation
after four denials and refuses further shared locks. A
livelock also occurs when read transactions monopolize a
table or page, forcing a write transaction to wait
indefinitely.A human example of live lock would be two people who meet
face-to-face in a corridor and each moves aside to let the
other pass, but they end up moving from side to side without
making any progress because they always move the same way at
the same time and never cross each other. This is good
example of live lock.
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