sql tsql__kill_idle_session.sql

Posted 2021-05-13

/* 
'* File:          KillIdleSession.sql 
'* Created Date:  2013/03/18 
'* Modified Date: 2013/03/18 
'* Author         : Ray Yen 
'* 
'* Version        :   1.0 
'* 
'* Main Function: Kill SQL Server connection which was a idle session (just awaiting command and last_batch exceed a period of time) 
'* 
'* Important : Please DO NOT run this script without troushooting SQL server performance related steps. 
'*             For exmaple, please check total session count, top expensive query, wait status information, DMV for checking high CPU, excessive disk I/O, memory comsumers. 
'* 
'* Copyright (C) 2013 Microsoft Corporation 

https://gallery.technet.microsoft.com/scriptcenter/How-to-kill-SQL-Server-a33476b7
*/ 
  
SET NOCOUNT ON 
  
DECLARE @IDLE_TIME DATETIME 
DECLARE @LAST_BATCH DATETIME 
  
DECLARE @nKillProcess INT 
DECLARE @nFetchStatus INT 
DECLARE @sTemp VARCHAR(30) 
  
--Please set the idle time (Hour:Minutes:Second) 
SET @IDLE_TIME = '00:30:00' 
 
IF OBJECT_ID('tempddb..#SESSION_TEMP_RECORD') IS NOT NULL
	DROP TABLE #SESSION_TEMP_RECORD;
--CREATE TEMP TABLE FOR STORE SESSION DATA 
CREATE TABLE #SESSION_TEMP_RECORD 
( 
spid smallint, 
last_batch datetime, 
kpid smallint, 
[status] nchar(60), 
waittype binary, 
waittime bigint, 
lastwaittype nchar(64), 
[dbid] smallint, 
cmd  nchar(32), 
hostname nchar(256), 
loginame nchar(256), 
IDLE_TIME_TARGET DATETIME 
) 
  
--SELECT CURRENT SESSION RECORDS WHICH MEETS REQUIREMENTS 
INSERT INTO #SESSION_TEMP_RECORD(spid,last_batch,kpid,[status],waittype,waittime,lastwaittype,[dbid],cmd,hostname,loginame) 
SELECT 
spid,last_batch,kpid,status,waittype,waittime,lastwaittype,dbid,cmd,hostname,loginame 
from sys.sysprocesses 
WHERE status IN ('sleeping') 
and cmd IN ('AWAITING COMMAND') 
and kpid = 0 -- Not processing now, > 1 means this session own at least a SQL Server thread 
AND spid > 50 
and DB_NAME(dbid) not in ('master','tempdb','model','msdb')    -- You could add database name which you want to exclude 
--and hostname IN ('host1','host2')                            -- You add add host name which you want to exclude 
--and open_tran = 0                                            -- open_tran > 0 means there are some transaction still active 
  
--Update IDLE_TIME_TARGET column and get the idle time target 
UPDATE #SESSION_TEMP_RECORD 
SET IDLE_TIME_TARGET = GETDATE()-@IDLE_TIME 
  
--SELECT * FROM #SESSION_TEMP_RECORD WHERE last_batch < IDLE_TIME_TARGET 
  
DECLARE curProcesses CURSOR 
    LOCAL 
    FAST_FORWARD 
    READ_ONLY 
FOR 
     SELECT spid 
     FROM #SESSION_TEMP_RECORD 
     WHERE last_batch < IDLE_TIME_TARGET 
  
OPEN curProcesses 
  
FETCH NEXT FROM curProcesses INTO -- Get the first process 
@nKillProcess 
  
SET @nFetchStatus = @@FETCH_STATUS 
  
--Kill the processes 
WHILE @nFetchStatus = 0 
     BEGIN 
           SET @sTemp ='KILL ' + CAST(@nKillProcess as varchar(5)) 
           PRINT @sTemp 
           EXEC(@sTemp) 
           FETCH NEXT FROM curProcesses INTO --Gets the next process 
                 @nKillProcess 
           SET @nFetchStatus = @@FETCH_STATUS 
     END 
  
CLOSE curProcesses 
DEALLOCATE curProcesses