![]() High: It is the highest deadlock priority 5.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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