![]() ![]() Normal: It is the default deadlock priority 0.Low: It is equivalent to deadlock priority -5.Users can set the deadlock priority in a transaction using the DEADLOCK_PRIORITY statement. The impacts of using SQL Server deadlock priority statementsīy default, SQL Server marks the transaction with the least expensive rollback as a deadlock victim. In this session, process ID 69 was a deadlock victim. Once the SQL Server kills a process as a deadlock victim, you will receive the following message. It again resets the monitoring thread to 5 seconds if frequent deadlocks do not occur. If it detects a deadlock, it might reduce the frequency from 5 seconds to 100 milliseconds depending upon the deadlock occurrence. By default, SQL Server checks the deadlock situation every 5 seconds using the deadlock monitor. SQL Server kills the victim session so that another session can acquire the required lock to complete its transaction. ![]() By default, the transaction with the least amount of resources required for rollback is considered a victim. It uses an internal mechanism to identify the deadlock victim process. This checks the processes involved in a deadlock and identifies if a session has become a deadlock victim. SQL Server monitors deadlock situations periodically using the deadlock monitor thread. SQL Server deadlock monitoring mechanisms This situation is known as a SQL Server deadlock. In this case, neither of the transactions can proceed because each transaction requires a resource held by the other transaction. John already has an exclusive lock on the customer table.
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