May 17, 2026, 11:40 PM

2026-05-18 06:40:19 +00:00
commit 64944cf004
896 changed files with 310709 additions and 0 deletions
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+/**********************************************
+          Monitoring Wait stats
+***********************************************/
+
+--========================================--
+/*** 1. Monitor Current sessions wait ***/
+--========================================--
+
+
+SELECT
+  dm_ws.wait_duration_ms,
+  dm_ws.wait_type,
+  dm_es.status,
+  dm_t.TEXT,
+  dm_qp.query_plan,
+  dm_ws.session_ID,
+  dm_es.cpu_time,
+  dm_es.memory_usage,
+  dm_es.logical_reads,
+  dm_es.total_elapsed_time,
+  dm_es.program_name,
+  DB_NAME(dm_r.database_id) DatabaseName,
+  -- Optional columns
+  dm_ws.blocking_session_id,
+  dm_r.wait_resource,
+  dm_es.login_name,
+  dm_r.command,
+  dm_r.last_wait_type
+FROM sys.dm_os_waiting_tasks dm_ws
+INNER JOIN sys.dm_exec_requests dm_r
+  ON dm_ws.session_id = dm_r.session_id
+INNER JOIN sys.dm_exec_sessions dm_es
+  ON dm_es.session_id = dm_r.session_id
+CROSS APPLY sys.dm_exec_sql_text(dm_r.sql_handle) dm_t
+CROSS APPLY sys.dm_exec_query_plan(dm_r.plan_handle) dm_qp
+WHERE dm_es.is_user_process = 1
+GO
+
+--===========================================--
+/*** 2. Monior waits for a specific period ***/
+--===========================================--
+
+-- Got this from SQLskills.com
+-- You can set the time limit in > WAITFOR DELAY '00:30:00';
+
+IF EXISTS (SELECT
+    *
+  FROM [tempdb].[sys].[objects]
+  WHERE [name] = N'##SQLskillsStats1')
+  DROP TABLE [##SQLskillsStats1];
+
+IF EXISTS (SELECT
+    *
+  FROM [tempdb].[sys].[objects]
+  WHERE [name] = N'##SQLskillsStats2')
+  DROP TABLE [##SQLskillsStats2];
+GO
+
+SELECT
+  [wait_type],
+  [waiting_tasks_count],
+  [wait_time_ms],
+  [max_wait_time_ms],
+  [signal_wait_time_ms] INTO ##SQLskillsStats1
+FROM sys.dm_os_wait_stats;
+GO
+
+WAITFOR DELAY '00:30:00';
+GO
+
+SELECT
+  [wait_type],
+  [waiting_tasks_count],
+  [wait_time_ms],
+  [max_wait_time_ms],
+  [signal_wait_time_ms] INTO ##SQLskillsStats2
+FROM sys.dm_os_wait_stats;
+GO
+
+WITH [DiffWaits]
+AS (SELECT
+  -- Waits that weren't in the first snapshot
+  [ts2].[wait_type],
+  [ts2].[wait_time_ms],
+  [ts2].[signal_wait_time_ms],
+  [ts2].[waiting_tasks_count]
+FROM [##SQLskillsStats2] AS [ts2]
+LEFT OUTER JOIN [##SQLskillsStats1] AS [ts1]
+  ON [ts2].[wait_type] = [ts1].[wait_type]
+WHERE [ts1].[wait_type] IS NULL
+AND [ts2].[wait_time_ms] > 0
+UNION
+SELECT
+  -- Diff of waits in both snapshots
+  [ts2].[wait_type],
+  [ts2].[wait_time_ms] - [ts1].[wait_time_ms] AS [wait_time_ms],
+  [ts2].[signal_wait_time_ms] - [ts1].[signal_wait_time_ms] AS [signal_wait_time_ms],
+  [ts2].[waiting_tasks_count] - [ts1].[waiting_tasks_count] AS [waiting_tasks_count]
+FROM [##SQLskillsStats2] AS [ts2]
+LEFT OUTER JOIN [##SQLskillsStats1] AS [ts1]
+  ON [ts2].[wait_type] = [ts1].[wait_type]
+WHERE [ts1].[wait_type] IS NOT NULL
+AND [ts2].[waiting_tasks_count] - [ts1].[waiting_tasks_count] > 0
+AND [ts2].[wait_time_ms] - [ts1].[wait_time_ms] > 0),
+[Waits]
+AS (SELECT
+  [wait_type],
+  [wait_time_ms] / 1000.0 AS [WaitS],
+  ([wait_time_ms] - [signal_wait_time_ms]) / 1000.0 AS [ResourceS],
+  [signal_wait_time_ms] / 1000.0 AS [SignalS],
+  [waiting_tasks_count] AS [WaitCount],
+  100.0 * [wait_time_ms] / SUM([wait_time_ms]) OVER () AS [Percentage],
+  ROW_NUMBER() OVER (ORDER BY [wait_time_ms] DESC) AS [RowNum]
+FROM [DiffWaits]
+WHERE [wait_type] NOT IN (
+N'BROKER_EVENTHANDLER', N'BROKER_RECEIVE_WAITFOR',
+N'BROKER_TASK_STOP', N'BROKER_TO_FLUSH',
+N'BROKER_TRANSMITTER', N'CHECKPOINT_QUEUE',
+N'CHKPT', N'CLR_AUTO_EVENT',
+N'CLR_MANUAL_EVENT', N'CLR_SEMAPHORE',
+N'DBMIRROR_DBM_EVENT', N'DBMIRROR_EVENTS_QUEUE',
+N'DBMIRROR_WORKER_QUEUE', N'DBMIRRORING_CMD',
+N'DIRTY_PAGE_POLL', N'DISPATCHER_QUEUE_SEMAPHORE',
+N'EXECSYNC', N'FSAGENT',
+N'FT_IFTS_SCHEDULER_IDLE_WAIT', N'FT_IFTSHC_MUTEX',
+N'HADR_CLUSAPI_CALL', N'HADR_FILESTREAM_IOMGR_IOCOMPLETION',
+N'HADR_LOGCAPTURE_WAIT', N'HADR_NOTIFICATION_DEQUEUE',
+N'HADR_TIMER_TASK', N'HADR_WORK_QUEUE',
+N'KSOURCE_WAKEUP', N'LAZYWRITER_SLEEP',
+N'LOGMGR_QUEUE', N'ONDEMAND_TASK_QUEUE',
+N'PWAIT_ALL_COMPONENTS_INITIALIZED',
+N'QDS_PERSIST_TASK_MAIN_LOOP_SLEEP',
+N'QDS_SHUTDOWN_QUEUE',
+N'QDS_CLEANUP_STALE_QUERIES_TASK_MAIN_LOOP_SLEEP',
+N'REQUEST_FOR_DEADLOCK_SEARCH', N'RESOURCE_QUEUE',
+N'SERVER_IDLE_CHECK', N'SLEEP_BPOOL_FLUSH',
+N'SLEEP_DBSTARTUP', N'SLEEP_DCOMSTARTUP',
+N'SLEEP_MASTERDBREADY', N'SLEEP_MASTERMDREADY',
+N'SLEEP_MASTERUPGRADED', N'SLEEP_MSDBSTARTUP',
+N'SLEEP_SYSTEMTASK', N'SLEEP_TASK',
+N'SLEEP_TEMPDBSTARTUP', N'SNI_HTTP_ACCEPT',
+N'SP_SERVER_DIAGNOSTICS_SLEEP', N'SQLTRACE_BUFFER_FLUSH',
+N'SQLTRACE_INCREMENTAL_FLUSH_SLEEP',
+N'SQLTRACE_WAIT_ENTRIES', N'WAIT_FOR_RESULTS',
+N'WAITFOR', N'WAITFOR_TASKSHUTDOWN',
+N'WAIT_XTP_HOST_WAIT', N'WAIT_XTP_OFFLINE_CKPT_NEW_LOG',
+N'WAIT_XTP_CKPT_CLOSE', N'XE_DISPATCHER_JOIN',
+N'XE_DISPATCHER_WAIT', N'XE_TIMER_EVENT'))
+SELECT
+  [W1].[wait_type] AS [WaitType],
+  CAST([W1].[WaitS] AS decimal(16, 2)) AS [Wait_S],
+  CAST([W1].[ResourceS] AS decimal(16, 2)) AS [Resource_S],
+  CAST([W1].[SignalS] AS decimal(16, 2)) AS [Signal_S],
+  [W1].[WaitCount] AS [WaitCount],
+  CAST([W1].[Percentage] AS decimal(5, 2)) AS [Percentage],
+  CAST(([W1].[WaitS] / [W1].[WaitCount]) AS decimal(16, 4)) AS [AvgWait_S],
+  CAST(([W1].[ResourceS] / [W1].[WaitCount]) AS decimal(16, 4)) AS [AvgRes_S],
+  CAST(([W1].[SignalS] / [W1].[WaitCount]) AS decimal(16, 4)) AS [AvgSig_S]
+FROM [Waits] AS [W1]
+INNER JOIN [Waits] AS [W2]
+  ON [W2].[RowNum] <= [W1].[RowNum]
+GROUP BY [W1].[RowNum],
+         [W1].[wait_type],
+         [W1].[WaitS],
+         [W1].[ResourceS],
+         [W1].[SignalS],
+         [W1].[WaitCount],
+         [W1].[Percentage]
+HAVING SUM([W2].[Percentage]) - [W1].[Percentage] < 95; -- percentage threshold
+GO
+
+-- Cleanup
+IF EXISTS (SELECT
+    *
+  FROM [tempdb].[sys].[objects]
+  WHERE [name] = N'##SQLskillsStats1')
+  DROP TABLE [##SQLskillsStats1];
+
+IF EXISTS (SELECT
+    *
+  FROM [tempdb].[sys].[objects]
+  WHERE [name] = N'##SQLskillsStats2')
+  DROP TABLE [##SQLskillsStats2];
+GO