Welcome to SQLDBANow.com! This blog, created by Bandaru Ajeyudu, is dedicated to learning and sharing knowledge about SQL DBA and Azure SQL. Join us as we explore insights, tips, and best practices in the world of SQL Database Administration and Azure SQL.
——- KILL all the connections for a database ——
Use Master
Go
Declare @dbname sysname
Set @dbname = 'Put-Your-DB-Name'
Declare @spid int
Select @spid = min(spid) from master.dbo.sysprocesses
where dbid = db_id(@dbname)
While @spid Is Not Null
Begin
Execute ('Kill' + @spid)
Select @spid = min(spid) from master.dbo.sysprocesses
where dbid = db_id(@dbname) and spid > @spid
End
select top 10 *
from sys.dm_os_wait_stats
where wait_type not in --remove common waits to identify worst bottlenecks
(
'KSOURCE_WAKEUP', 'SLEEP_BPOOL_FLUSH', 'BROKER_TASK_STOP',
'XE_TIMER_EVENT', 'XE_DISPATCHER_WAIT', 'FT_IFTS_SCHEDULER_IDLE_WAIT',
'SQLTRACE_BUFFER_FLUSH', 'CLR_AUTO_EVENT', 'BROKER_EVENTHANDLER',
'LAZYWRITER_SLEEP', 'BAD_PAGE_PROCESS', 'BROKER_TRANSMITTER',
'CHECKPOINT_QUEUE', 'DBMIRROR_EVENTS_QUEUE', 'LAZYWRITER_SLEEP',
'ONDEMAND_TASK_QUEUE', 'REQUEST_FOR_DEADLOCK_SEARCH', 'LOGMGR_QUEUE',
'SLEEP_TASK', 'SQLTRACE_BUFFER_FLUSH', 'CLR_MANUAL_EVENT',
'BROKER_RECEIVE_WAITFOR', 'PREEMPTIVE_OS_GETPROCADDRESS',
'PREEMPTIVE_OS_AUTHENTICATIONOPS', 'BROKER_TO_FLUSH'
)
order by wait_time_ms desc
SELECT SUM(signal_wait_time_ms) AS TotalSignalWaitTime ,
( SUM(CAST(signal_wait_time_ms AS NUMERIC(20, 2)))
/ SUM(CAST(wait_time_ms AS NUMERIC(20, 2))) * 100 )
AS PercentageSignalWaitsOfTotalTime
FROM sys.dm_os_wait_stats