This is a quick post to blog a script that allows spinlock statistics to be captured for a defined period of time (as I need to reference it in my next post). Enjoy!<\/p>\n
\r\nIF EXISTS (SELECT * FROM [tempdb].[sys].[objects]\r\n\tWHERE [name] = N'##TempSpinlockStats1')\r\n\tDROP TABLE [##TempSpinlockStats1];\r\n\r\nIF EXISTS (SELECT * FROM [tempdb].[sys].[objects]\r\n\tWHERE [name] = N'##TempSpinlockStats2')\r\n\tDROP TABLE [##TempSpinlockStats2];\r\nGO\r\n\r\n-- Baseline\r\nSELECT * INTO [##TempSpinlockStats1]\r\nFROM sys.dm_os_spinlock_stats\r\nWHERE [collisions] > 0\r\nORDER BY [name];\r\nGO\r\n\r\n-- Now wait...\r\nWAITFOR DELAY '00:00:05';\r\nGO\r\n\r\n-- Capture updated stats\r\nSELECT * INTO [##TempSpinlockStats2]\r\nFROM sys.dm_os_spinlock_stats\r\nWHERE [collisions] > 0\r\nORDER BY [name];\r\nGO\r\n\r\n-- Diff them\r\nSELECT\r\n\t\t'***' AS [New],\r\n\t\t[ts2].[name] AS [Spinlock],\r\n\t\t[ts2].[collisions] AS [DiffCollisions],\r\n\t\t[ts2].[spins] AS [DiffSpins],\r\n\t\t[ts2].[spins_per_collision] AS [SpinsPerCollision],\r\n\t\t[ts2].[sleep_time] AS [DiffSleepTime],\r\n\t\t[ts2].[backoffs] AS [DiffBackoffs]\r\n\tFROM [##TempSpinlockStats2] [ts2]\r\n\tLEFT OUTER JOIN [##TempSpinlockStats1] [ts1]\r\n\t\tON [ts2].[name] = [ts1].[name]\r\n\tWHERE [ts1].[name] IS NULL\r\nUNION\r\nSELECT\r\n\t\t'' AS [New],\r\n\t\t[ts2].[name] AS [Spinlock],\r\n\t\t[ts2].[collisions] - [ts1].[collisions] AS [DiffCollisions],\r\n\t\t[ts2].[spins] - [ts1].[spins] AS [DiffSpins],\r\n\t\tCASE ([ts2].[spins] - [ts1].[spins]) WHEN 0 THEN 0\r\n\t\t\tELSE ([ts2].[spins] - [ts1].[spins]) \/\r\n\t\t\t\t([ts2].[collisions] - [ts1].[collisions]) END\r\n\t\t\t\tAS [SpinsPerCollision],\r\n\t\t[ts2].[sleep_time] - [ts1].[sleep_time] AS [DiffSleepTime],\r\n\t\t[ts2].[backoffs] - [ts1].[backoffs] AS [DiffBackoffs]\r\n\tFROM [##TempSpinlockStats2] [ts2]\r\n\tLEFT OUTER JOIN [##TempSpinlockStats1] [ts1]\r\n\t\tON [ts2].[name] = [ts1].[name]\r\n\tWHERE [ts1].[name] IS NOT NULL\r\n\tAND [ts2].[collisions] - [ts1].[collisions] > 0\r\nORDER BY [New] DESC, [Spinlock] ASC;\r\nGO\r\n<\/pre>\nExample output (trimmed to fit here):<\/p>\n
\r\nNew Spinlock DiffCollisions DiffSpins SpinsPerCollision DiffSleepTime DiffBackoffs\r\n---- ---------------------- ---------------- ----------- ----------------- --------------- ------------\r\n ALLOC_CACHES_HASH 999 257750 258 0 5\r\n BLOCKER_ENUM 103 27250 264 0 2\r\n CMED_HASH_SET 286 71500 250 0 0\r\n COMPPLAN_SKELETON 148 37000 250 0 0\r\n DBTABLE 14 3500 250 0 0\r\n FGCB_PRP_FILL 4 1000 250 0 0\r\n FREE_SPACE_CACHE_ENTRY 983 255250 259 0 7\r\n LOGCACHE_ACCESS 3353 314628 93 0 2241\r\n LOGFLUSHQ 797 206250 258 0 10\r\n OPT_IDX_STATS 147 36750 250 0 0\r\n RESQUEUE 23 5750 250 0 0\r\n SECURITY_CACHE 106 26500 250 0 0\r\n SOS_CACHESTORE 235 60750 258 0 3\r\n SOS_OBJECT_STORE 55 13750 250 0 0\r\n SOS_SCHEDULER 219 54750 250 0 0\r\n SOS_SUSPEND_QUEUE 72 18000 250 0 0\r\n SOS_TASK 69 18750 271 0 2\r\n SQL_MGR 394 98500 250 0 0\r\n XDES 52 13000 250 0 0\r\n XDESMGR 840 341500 406 0 16\r\n XTS_MGR 165 42750 259 0 2\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"This is a quick post to blog a script that allows spinlock statistics to be captured for a defined period of time (as I need to reference it in my next post). Enjoy! IF EXISTS (SELECT * FROM [tempdb].[sys].[objects] WHERE [name] = N’##TempSpinlockStats1′) DROP TABLE [##TempSpinlockStats1]; IF EXISTS (SELECT * FROM [tempdb].[sys].[objects] WHERE [name] = […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66,84,101],"tags":[],"class_list":["post-4649","post","type-post","status-publish","format-standard","hentry","category-performance-tuning","category-spinlocks","category-wait-stats"],"yoast_head":"\n
Capturing spinlock statistics for a period of time - Paul S. Randal<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sqlskills.com\/blogs\/paul\/capturing-spinlock-statistics-for-a-period-of-time\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Capturing spinlock statistics for a period of time - Paul S. Randal\" \/>\n<meta property=\"og:description\" content=\"This is a quick post to blog a script that allows spinlock statistics to be captured for a defined period of time (as I need to reference it in my next post). Enjoy! 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