(DIR) Return Create A Forum - Home --------------------------------------------------------- ExcelSoft Database Professionals (HTM) https://esdbp.createaforum.com --------------------------------------------------------- ***************************************************** (DIR) Return to: Scripts ***************************************************** #Post#: 107-------------------------------------------------- Wait Status Information Capture By: srinivasma_exceldbp Date: November 24, 2014, 11:31 pm --------------------------------------------------------- /* The script does the following: Capture Wait Status Information on the server Creates two temporary tables Captures the output from sys.dm_os_wait_stats into the first table Waits for a configurable delay (30 minutes in the example) Captures the output from sys.dm_os_wait_stats into the second table */ IF EXISTS (SELECT * FROM [tempdb].[sys].[objects] WHERE [name] = N'##Stats1') DROP TABLE [##Stats1]; IF EXISTS (SELECT * FROM [tempdb].[sys].[objects] WHERE [name] = N'##Stats2') DROP TABLE [##Stats2]; GO SELECT [wait_type], [waiting_tasks_count], [wait_time_ms], [max_wait_time_ms], [signal_wait_time_ms] INTO ##Stats1 FROM sys.dm_os_wait_stats; GO WAITFOR DELAY '00:30:00'; -- 30 minutes delay GO SELECT [wait_type], [waiting_tasks_count], [wait_time_ms], [max_wait_time_ms], [signal_wait_time_ms] INTO ##Stats2 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 [##Stats2] AS [ts2] LEFT OUTER JOIN [##Stats1] 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 [##Stats2] AS [ts2] LEFT OUTER JOIN [##Stats1] 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_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'##Stats1') DROP TABLE [##Stats1]; IF EXISTS (SELECT * FROM [tempdb].[sys].[objects] WHERE [name] = N'##Stats2') DROP TABLE [##Stats2]; GO *****************************************************