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- SELECT DB_NAME(fs.database_id) AS [Database Name] ,
- mf.physical_name ,
- io_stall_read_ms ,
- num_of_reads ,
- CAST(io_stall_read_ms / ( 1.0 + num_of_reads ) AS NUMERIC(10, 1)) AS [avg_read_stall_ms] ,
- io_stall_write_ms ,
- num_of_writes ,
- CAST(io_stall_write_ms / ( 1.0 + num_of_writes ) AS NUMERIC(10, 1)) AS [avg_write_stall_ms] ,
- io_stall_read_ms + io_stall_write_ms AS [io_stalls] ,
- num_of_reads + num_of_writes AS [total_io] ,
- CAST(( io_stall_read_ms + io_stall_write_ms ) / ( 1.0 + num_of_reads
- + num_of_writes ) AS NUMERIC(10,
- 1)) AS [avg_io_stall_ms]
- FROM sys.dm_io_virtual_file_stats(NULL, NULL) AS fs
- INNER JOIN sys.master_files AS mf WITH ( NOLOCK ) ON fs.database_id = mf.database_id
- AND fs.[file_id] = mf.[file_id]
- ORDER BY avg_io_stall_ms DESC
- OPTION ( RECOMPILE );
- SELECT TOP 10
- wait_type ,
- max_wait_time_ms wait_time_ms ,
- signal_wait_time_ms ,
- wait_time_ms - signal_wait_time_ms AS resource_wait_time_ms ,
- 100.0 * wait_time_ms / SUM(wait_time_ms) OVER ( ) AS percent_total_waits ,
- 100.0 * signal_wait_time_ms / SUM(signal_wait_time_ms) OVER ( ) AS percent_total_signal_waits ,
- 100.0 * ( wait_time_ms - signal_wait_time_ms )
- / SUM(wait_time_ms) OVER ( ) AS percent_total_resource_waits
- FROM sys.dm_os_wait_stats
- WHERE wait_time_ms > 0 -- remove zero wait_time
- AND wait_type NOT IN -- filter out additional irrelevant waits
- ( 'SLEEP_TASK', 'BROKER_TASK_STOP', 'BROKER_TO_FLUSH', 'SQLTRACE_BUFFER_FLUSH',
- 'CLR_AUTO_EVENT', 'CLR_MANUAL_EVENT', 'LAZYWRITER_SLEEP', 'SLEEP_SYSTEMTASK',
- 'SLEEP_BPOOL_FLUSH', 'BROKER_EVENTHANDLER', 'XE_DISPATCHER_WAIT',
- 'FT_IFTSHC_MUTEX', 'CHECKPOINT_QUEUE', 'FT_IFTS_SCHEDULER_IDLE_WAIT',
- 'BROKER_TRANSMITTER', 'FT_IFTSHC_MUTEX', 'KSOURCE_WAKEUP',
- 'LAZYWRITER_SLEEP', 'LOGMGR_QUEUE', 'ONDEMAND_TASK_QUEUE',
- 'REQUEST_FOR_DEADLOCK_SEARCH', 'XE_TIMER_EVENT', 'BAD_PAGE_PROCESS',
- 'DBMIRROR_EVENTS_QUEUE', 'BROKER_RECEIVE_WAITFOR',
- 'PREEMPTIVE_OS_GETPROCADDRESS', 'PREEMPTIVE_OS_AUTHENTICATIONOPS', 'WAITFOR',
- 'DISPATCHER_QUEUE_SEMAPHORE', 'XE_DISPATCHER_JOIN', 'RESOURCE_QUEUE' )
- ORDER BY wait_time_ms DESC
- sys.dm_io_virtual_file_stats
- sys.dm_io_pending_io_requests
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