If the specified session ID or UOW has a lot of work to undo, the KILL statement may take some time to complete, particularly when it involves rolling back a long transaction. KILL can be used to terminate a normal connection, which internally terminates the transactions that are associated with the specified session ID. The statement can also be used to terminate orphaned and in- doubt distributed transactions when Microsoft Distributed Transaction Coordinator (MS DTC) is in use. The session ID value is tied to the connection for the duration of the connection. When the connection ends, the integer value is released and can be reassigned to a new connection. Use KILL session ID to terminate regular nondistributed and distributed transactions that are associated with a specified session ID. UOWApplies to: (SQL Server 2. SQL Server 2. 01. Identifies the Unit of Work ID (UOW) of distributed transactions. UOW is a GUID that may be obtained from the request. UOW also can be obtained from the error log or through the MS DTC monitor. For more information about monitoring distributed transactions, see the MS DTC documentation. Use KILL UOW to terminate orphaned distributed transactions. These transactions are not associated with any real session ID, but instead are associated artificially with session ID = '- 2'. This session ID makes it easier to identify orphaned transactions by querying the session ID column in sys. KILL WITH STATUSONLY does not terminate or roll back the session ID or UOW; the command only displays the current progress of the rollback. KILL is commonly used to terminate a process that is blocking other important processes with locks, or a process that is executing a query that is using necessary system resources. System processes and processes running an extended stored procedure cannot be terminated. Use KILL very carefully, especially when critical processes are running. You cannot kill your own process. Other processes you should not kill include the following: AWAITING COMMANDCHECKPOINT SLEEPLAZY WRITERLOCK MONITORSIGNAL HANDLERUse @@SPID to display the session ID value for the current session. To obtain a report of active session ID values, you can query the session. You can also view the SPID column that is returned by the sp. If a rollback is in progress for a specific SPID, the cmd column in the sp. These transactions are unresolved distributed transactions that occur because of unplanned restarts of the database server or MS DTC coordinator. For more information about in- doubt transactions, see the . The progress report states the amount of rollback completed (in percent) and the estimated length of time left (in seconds), in the following form: Spid. Estimated rollback completion: < yy> % Estimated time left: < zz> seconds. If the rollback of the session ID or UOW has finished when the KILL session ID. Rollback operation for Process ID < session ID> is not in progress. Repeating a KILL session ID statement might terminate a new process if the rollback had finished and the session ID was reassigned to a new task before the new KILL statement is run. Specifying WITH STATUSONLY prevents this from happening. SQL Server: Requires the ALTER ANY CONNECTION permission. ALTER ANY CONNECTION is included with membership in the sysadmin or processadmin fixed server roles. SQL Database: Requires the KILL DATABASE CONNECTION permission. The server- level principal login has the KILL DATABASE CONNECTION. A. Using KILL to terminate a session. The following example shows how to terminate session ID 5. B. Using KILL session ID WITH STATUSONLY to obtain a progress report. The following example generates a status of the rollback process for the specific session ID. Estimated rollback completion: 8. Estimated time left: 1. Using KILL to terminate an orphaned distributed transaction. The following example shows how to terminate an orphaned distributed transaction (session ID = - 2) with a UOW of D5. C6. 6- E3. 98- 4. CA- BF7. E- DC9. C1. B4. 8CF. Using KILL to terminate a session. The following example shows how to terminate session ID SID5. KILL STATS JOB (Transact- SQL)KILL QUERY NOTIFICATION SUBSCRIPTION (Transact- SQL)Built- in Functions (Transact- SQL)SHUTDOWN (Transact- SQL)@@SPID (Transact- SQL)sys. KILL(2) Linux Programmer's Manual KILL(2) NAME top kill - send signal to a process SYNOPSIS top. Thank you for being here to Kill Llu. From the performer's viewpoint, it is a non-performance: it is you who will perform the action.
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