6 lines
3.6 KiB
JSON
6 lines
3.6 KiB
JSON
{
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"id": "cdc9ce01-725c-4483-9d8e-b8f0d878066e",
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"prefix": "dmvTopWaits",
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"description": "Isolate top waits for server instance since last restart or wait statistics clear",
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"body": "WITH [Waits] \r\nAS (SELECT wait_type, wait_time_ms/ 1000.0 AS [WaitS],\r\n (wait_time_ms - signal_wait_time_ms) / 1000.0 AS [ResourceS],\r\n signal_wait_time_ms / 1000.0 AS [SignalS],\r\n waiting_tasks_count AS [WaitCount],\r\n 100.0 * wait_time_ms / SUM (wait_time_ms) OVER() AS [Percentage],\r\n ROW_NUMBER() OVER(ORDER BY wait_time_ms DESC) AS [RowNum]\r\n FROM sys.dm_os_wait_stats WITH (NOLOCK)\r\n WHERE [wait_type] NOT IN (\r\n N'BROKER_EVENTHANDLER', N'BROKER_RECEIVE_WAITFOR', N'BROKER_TASK_STOP',\r\n\t\tN'BROKER_TO_FLUSH', N'BROKER_TRANSMITTER', N'CHECKPOINT_QUEUE',\r\n N'CHKPT', N'CLR_AUTO_EVENT', N'CLR_MANUAL_EVENT', N'CLR_SEMAPHORE',\r\n N'DBMIRROR_DBM_EVENT', N'DBMIRROR_EVENTS_QUEUE', N'DBMIRROR_WORKER_QUEUE',\r\n\t\tN'DBMIRRORING_CMD', N'DIRTY_PAGE_POLL', N'DISPATCHER_QUEUE_SEMAPHORE',\r\n N'EXECSYNC', N'FSAGENT', N'FT_IFTS_SCHEDULER_IDLE_WAIT', N'FT_IFTSHC_MUTEX',\r\n N'HADR_CLUSAPI_CALL', N'HADR_FILESTREAM_IOMGR_IOCOMPLETION', N'HADR_LOGCAPTURE_WAIT', \r\n\t\tN'HADR_NOTIFICATION_DEQUEUE', N'HADR_TIMER_TASK', N'HADR_WORK_QUEUE',\r\n N'KSOURCE_WAKEUP', N'LAZYWRITER_SLEEP', N'LOGMGR_QUEUE', N'ONDEMAND_TASK_QUEUE',\r\n N'PWAIT_ALL_COMPONENTS_INITIALIZED', N'QDS_PERSIST_TASK_MAIN_LOOP_SLEEP',\r\n N'QDS_CLEANUP_STALE_QUERIES_TASK_MAIN_LOOP_SLEEP', N'REQUEST_FOR_DEADLOCK_SEARCH',\r\n\t\tN'RESOURCE_QUEUE', N'SERVER_IDLE_CHECK', N'SLEEP_BPOOL_FLUSH', N'SLEEP_DBSTARTUP',\r\n\t\tN'SLEEP_DCOMSTARTUP', N'SLEEP_MASTERDBREADY', N'SLEEP_MASTERMDREADY',\r\n N'SLEEP_MASTERUPGRADED', N'SLEEP_MSDBSTARTUP', N'SLEEP_SYSTEMTASK', N'SLEEP_TASK',\r\n N'SLEEP_TEMPDBSTARTUP', N'SNI_HTTP_ACCEPT', N'SP_SERVER_DIAGNOSTICS_SLEEP',\r\n\t\tN'SQLTRACE_BUFFER_FLUSH', N'SQLTRACE_INCREMENTAL_FLUSH_SLEEP', N'SQLTRACE_WAIT_ENTRIES',\r\n\t\tN'WAIT_FOR_RESULTS', N'WAITFOR', N'WAITFOR_TASKSHUTDOWN', N'WAIT_XTP_HOST_WAIT',\r\n\t\tN'WAIT_XTP_OFFLINE_CKPT_NEW_LOG', N'WAIT_XTP_CKPT_CLOSE', N'XE_DISPATCHER_JOIN',\r\n N'XE_DISPATCHER_WAIT', N'XE_TIMER_EVENT')\r\n AND waiting_tasks_count > 0)\r\nSELECT\r\n MAX (W1.wait_type) AS [WaitType],\r\n CAST (MAX (W1.WaitS) AS DECIMAL (16,2)) AS [Wait_Sec],\r\n CAST (MAX (W1.ResourceS) AS DECIMAL (16,2)) AS [Resource_Sec],\r\n CAST (MAX (W1.SignalS) AS DECIMAL (16,2)) AS [Signal_Sec],\r\n MAX (W1.WaitCount) AS [Wait Count],\r\n CAST (MAX (W1.Percentage) AS DECIMAL (5,2)) AS [Wait Percentage],\r\n CAST ((MAX (W1.WaitS) / MAX (W1.WaitCount)) AS DECIMAL (16,4)) AS [AvgWait_Sec],\r\n CAST ((MAX (W1.ResourceS) / MAX (W1.WaitCount)) AS DECIMAL (16,4)) AS [AvgRes_Sec],\r\n CAST ((MAX (W1.SignalS) / MAX (W1.WaitCount)) AS DECIMAL (16,4)) AS [AvgSig_Sec]\r\nFROM Waits AS W1\r\nINNER JOIN Waits AS W2\r\nON W2.RowNum <= W1.RowNum\r\nGROUP BY W1.RowNum\r\nHAVING SUM (W2.Percentage) - MAX (W1.Percentage) < 99 -- percentage threshold\r\nOPTION (RECOMPILE);\r\n\r\n-- The SQL Server Wait Type Repository\r\n-- http://blogs.msdn.com/b/psssql/archive/2009/11/03/the-sql-server-wait-type-repository.aspx\r\n\r\n-- Wait statistics, or please tell me where it hurts\r\n-- http://www.sqlskills.com/blogs/paul/wait-statistics-or-please-tell-me-where-it-hurts/\r\n\r\n-- SQL Server 2005 Performance Tuning using the Waits and Queues\r\n-- http://technet.microsoft.com/en-us/library/cc966413.aspx\r\n\r\n-- sys.dm_os_wait_stats (Transact-SQL)\r\n-- http://msdn.microsoft.com/en-us/library/ms179984(v=sql.105).aspx\r\n"
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} |