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Wait stat Monitoring added
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‎T-SQL Scripts/Wait stat Monitoring.sql‎

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/**********************************************
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Monitoring Wait stats
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***********************************************/
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--========================================--
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/*** 1. Monitor Current sessions wait ***/
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--========================================--
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SELECT
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dm_ws.wait_duration_ms,
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dm_ws.wait_type,
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dm_es.status,
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dm_t.TEXT,
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dm_qp.query_plan,
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dm_ws.session_ID,
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dm_es.cpu_time,
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dm_es.memory_usage,
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dm_es.logical_reads,
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dm_es.total_elapsed_time,
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dm_es.program_name,
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DB_NAME(dm_r.database_id) DatabaseName,
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-- Optional columns
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dm_ws.blocking_session_id,
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dm_r.wait_resource,
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dm_es.login_name,
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dm_r.command,
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dm_r.last_wait_type
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FROM sys.dm_os_waiting_tasks dm_ws
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INNER JOIN sys.dm_exec_requests dm_r
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ON dm_ws.session_id = dm_r.session_id
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INNER JOIN sys.dm_exec_sessions dm_es
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ON dm_es.session_id = dm_r.session_id
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CROSS APPLY sys.dm_exec_sql_text(dm_r.sql_handle) dm_t
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CROSS APPLY sys.dm_exec_query_plan(dm_r.plan_handle) dm_qp
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WHERE dm_es.is_user_process = 1
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GO
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--===========================================--
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/*** 2. Monior waits for a specific period ***/
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--===========================================--
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-- Got this from SQLskills.com
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-- You can set the time limit in > WAITFOR DELAY '00:30:00';
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IF EXISTS (SELECT
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*
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FROM [tempdb].[sys].[objects]
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WHERE [name] = N'##SQLskillsStats1')
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DROP TABLE [##SQLskillsStats1];
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IF EXISTS (SELECT
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*
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FROM [tempdb].[sys].[objects]
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WHERE [name] = N'##SQLskillsStats2')
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DROP TABLE [##SQLskillsStats2];
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GO
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SELECT
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[wait_type],
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[waiting_tasks_count],
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[wait_time_ms],
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[max_wait_time_ms],
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[signal_wait_time_ms] INTO ##SQLskillsStats1
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FROM sys.dm_os_wait_stats;
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GO
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WAITFOR DELAY '00:30:00';
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GO
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SELECT
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[wait_type],
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[waiting_tasks_count],
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[wait_time_ms],
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[max_wait_time_ms],
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[signal_wait_time_ms] INTO ##SQLskillsStats2
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FROM sys.dm_os_wait_stats;
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GO
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WITH [DiffWaits]
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AS (SELECT
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-- Waits that weren't in the first snapshot
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[ts2].[wait_type],
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[ts2].[wait_time_ms],
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[ts2].[signal_wait_time_ms],
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[ts2].[waiting_tasks_count]
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FROM [##SQLskillsStats2] AS [ts2]
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LEFT OUTER JOIN [##SQLskillsStats1] AS [ts1]
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ON [ts2].[wait_type] = [ts1].[wait_type]
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WHERE [ts1].[wait_type] IS NULL
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AND [ts2].[wait_time_ms] > 0
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UNION
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SELECT
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-- Diff of waits in both snapshots
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[ts2].[wait_type],
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[ts2].[wait_time_ms] - [ts1].[wait_time_ms] AS [wait_time_ms],
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[ts2].[signal_wait_time_ms] - [ts1].[signal_wait_time_ms] AS [signal_wait_time_ms],
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[ts2].[waiting_tasks_count] - [ts1].[waiting_tasks_count] AS [waiting_tasks_count]
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FROM [##SQLskillsStats2] AS [ts2]
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LEFT OUTER JOIN [##SQLskillsStats1] AS [ts1]
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ON [ts2].[wait_type] = [ts1].[wait_type]
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WHERE [ts1].[wait_type] IS NOT NULL
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AND [ts2].[waiting_tasks_count] - [ts1].[waiting_tasks_count] > 0
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AND [ts2].[wait_time_ms] - [ts1].[wait_time_ms] > 0),
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[Waits]
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AS (SELECT
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[wait_type],
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[wait_time_ms] / 1000.0 AS [WaitS],
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([wait_time_ms] - [signal_wait_time_ms]) / 1000.0 AS [ResourceS],
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[signal_wait_time_ms] / 1000.0 AS [SignalS],
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[waiting_tasks_count] AS [WaitCount],
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100.0 * [wait_time_ms] / SUM([wait_time_ms]) OVER () AS [Percentage],
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ROW_NUMBER() OVER (ORDER BY [wait_time_ms] DESC) AS [RowNum]
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FROM [DiffWaits]
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WHERE [wait_type] NOT IN (
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N'BROKER_EVENTHANDLER', N'BROKER_RECEIVE_WAITFOR',
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N'BROKER_TASK_STOP', N'BROKER_TO_FLUSH',
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N'BROKER_TRANSMITTER', N'CHECKPOINT_QUEUE',
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N'CHKPT', N'CLR_AUTO_EVENT',
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N'CLR_MANUAL_EVENT', N'CLR_SEMAPHORE',
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N'DBMIRROR_DBM_EVENT', N'DBMIRROR_EVENTS_QUEUE',
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N'DBMIRROR_WORKER_QUEUE', N'DBMIRRORING_CMD',
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N'DIRTY_PAGE_POLL', N'DISPATCHER_QUEUE_SEMAPHORE',
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N'EXECSYNC', N'FSAGENT',
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N'FT_IFTS_SCHEDULER_IDLE_WAIT', N'FT_IFTSHC_MUTEX',
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N'HADR_CLUSAPI_CALL', N'HADR_FILESTREAM_IOMGR_IOCOMPLETION',
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N'HADR_LOGCAPTURE_WAIT', N'HADR_NOTIFICATION_DEQUEUE',
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N'HADR_TIMER_TASK', N'HADR_WORK_QUEUE',
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N'KSOURCE_WAKEUP', N'LAZYWRITER_SLEEP',
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N'LOGMGR_QUEUE', N'ONDEMAND_TASK_QUEUE',
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N'PWAIT_ALL_COMPONENTS_INITIALIZED',
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N'QDS_PERSIST_TASK_MAIN_LOOP_SLEEP',
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N'QDS_SHUTDOWN_QUEUE',
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N'QDS_CLEANUP_STALE_QUERIES_TASK_MAIN_LOOP_SLEEP',
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N'REQUEST_FOR_DEADLOCK_SEARCH', N'RESOURCE_QUEUE',
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N'SERVER_IDLE_CHECK', N'SLEEP_BPOOL_FLUSH',
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N'SLEEP_DBSTARTUP', N'SLEEP_DCOMSTARTUP',
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N'SLEEP_MASTERDBREADY', N'SLEEP_MASTERMDREADY',
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N'SLEEP_MASTERUPGRADED', N'SLEEP_MSDBSTARTUP',
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N'SLEEP_SYSTEMTASK', N'SLEEP_TASK',
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N'SLEEP_TEMPDBSTARTUP', N'SNI_HTTP_ACCEPT',
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N'SP_SERVER_DIAGNOSTICS_SLEEP', N'SQLTRACE_BUFFER_FLUSH',
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N'SQLTRACE_INCREMENTAL_FLUSH_SLEEP',
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N'SQLTRACE_WAIT_ENTRIES', N'WAIT_FOR_RESULTS',
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N'WAITFOR', N'WAITFOR_TASKSHUTDOWN',
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N'WAIT_XTP_HOST_WAIT', N'WAIT_XTP_OFFLINE_CKPT_NEW_LOG',
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N'WAIT_XTP_CKPT_CLOSE', N'XE_DISPATCHER_JOIN',
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N'XE_DISPATCHER_WAIT', N'XE_TIMER_EVENT'))
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SELECT
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[W1].[wait_type] AS [WaitType],
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CAST([W1].[WaitS] AS decimal(16, 2)) AS [Wait_S],
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CAST([W1].[ResourceS] AS decimal(16, 2)) AS [Resource_S],
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CAST([W1].[SignalS] AS decimal(16, 2)) AS [Signal_S],
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[W1].[WaitCount] AS [WaitCount],
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CAST([W1].[Percentage] AS decimal(5, 2)) AS [Percentage],
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CAST(([W1].[WaitS] / [W1].[WaitCount]) AS decimal(16, 4)) AS [AvgWait_S],
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CAST(([W1].[ResourceS] / [W1].[WaitCount]) AS decimal(16, 4)) AS [AvgRes_S],
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CAST(([W1].[SignalS] / [W1].[WaitCount]) AS decimal(16, 4)) AS [AvgSig_S]
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FROM [Waits] AS [W1]
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INNER JOIN [Waits] AS [W2]
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ON [W2].[RowNum] <= [W1].[RowNum]
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GROUP BY [W1].[RowNum],
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[W1].[wait_type],
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[W1].[WaitS],
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[W1].[ResourceS],
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[W1].[SignalS],
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[W1].[WaitCount],
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[W1].[Percentage]
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HAVING SUM([W2].[Percentage]) - [W1].[Percentage] < 95; -- percentage threshold
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GO
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-- Cleanup
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IF EXISTS (SELECT
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*
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FROM [tempdb].[sys].[objects]
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WHERE [name] = N'##SQLskillsStats1')
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DROP TABLE [##SQLskillsStats1];
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IF EXISTS (SELECT
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*
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FROM [tempdb].[sys].[objects]
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WHERE [name] = N'##SQLskillsStats2')
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DROP TABLE [##SQLskillsStats2];
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GO
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