May 17, 2026, 11:40 PM

2026-05-18 06:40:19 +00:00
commit 64944cf004
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+/********************************************************************************************
+
+***  Blocking and deadlock monitor ***
+------------------------------------------------
+
+I have prepared this script to monitor blocking  sessions with sp_whoisactive,
+So first you need tocreate sp_whoisactive stored procedure, 
+please downad it from the link,
+
+https://github.com/SqlAdmin/AwesomeSQLServer/blob/master/T-SQL%20Scripts/sp_whoisactive.sql
+
+*******************************************************************************************/ 
+
+
+-- To get overall info about current sessions
+
+EXEC sp_whoisactive
+---------------------------------------
+/*** 1. Monitor blocking session ***/
+---------------------------------------
+
+EXEC sp_WhoIsActive @find_block_leaders = 1,
+                    @output_column_list = '[dd%][session_id][database_name][login_name] [sql_text][wait_info][blocking_session_id][blocked_session_count]',
+                    @sort_order = '[start_time] ASC';
+
+
+---------------------------------------
+/*** 2. Monitor deadlocking session ***/
+---------------------------------------
+
+WITH [Blocking]
+AS (SELECT
+  w.[session_id],
+  s.[original_login_name],
+  s.[login_name],
+  w.[wait_duration_ms],
+  w.[wait_type],
+  r.[status],
+  r.[wait_resource],
+  w.[resource_description],
+  s.[program_name],
+  w.[blocking_session_id],
+  s.[host_name],
+  r.[command],
+  r.[percent_complete],
+  r.[cpu_time],
+  r.[total_elapsed_time],
+  r.[reads],
+  r.[writes],
+  r.[logical_reads],
+  r.[row_count],
+  q.[text],
+  q.[dbid],
+  p.[query_plan],
+  r.[plan_handle]
+FROM [sys].[dm_os_waiting_tasks] w
+INNER JOIN [sys].[dm_exec_sessions] s
+  ON w.[session_id] = s.[session_id]
+INNER JOIN [sys].[dm_exec_requests] r
+  ON s.[session_id] = r.[session_id]
+CROSS APPLY [sys].[dm_exec_sql_text](r.[plan_handle]) q
+CROSS APPLY [sys].[dm_exec_query_plan](r.[plan_handle]) p
+WHERE w.[session_id] > 50
+AND w.[wait_type] NOT IN ('DBMIRROR_DBM_EVENT'
+, 'ASYNC_NETWORK_IO'))
+SELECT
+  b.[session_id] AS [WaitingSessionID],
+  b.[blocking_session_id] AS [BlockingSessionID],
+  b.[login_name] AS [WaitingUserSessionLogin],
+  s1.[login_name] AS [BlockingUserSessionLogin],
+  b.[original_login_name] AS [WaitingUserConnectionLogin],
+  s1.[original_login_name] AS [BlockingSessionConnectionLogin],
+  b.[wait_duration_ms] AS [WaitDuration],
+  b.[wait_type] AS [WaitType],
+  t.[request_mode] AS [WaitRequestMode],
+  UPPER(b.[status]) AS [WaitingProcessStatus],
+  UPPER(s1.[status]) AS [BlockingSessionStatus],
+  b.[wait_resource] AS [WaitResource],
+  t.[resource_type] AS [WaitResourceType],
+  t.[resource_database_id] AS [WaitResourceDatabaseID],
+  DB_NAME(t.[resource_database_id]) AS [WaitResourceDatabaseName],
+  b.[resource_description] AS [WaitResourceDescription],
+  b.[program_name] AS [WaitingSessionProgramName],
+  s1.[program_name] AS [BlockingSessionProgramName],
+  b.[host_name] AS [WaitingHost],
+  s1.[host_name] AS [BlockingHost],
+  b.[command] AS [WaitingCommandType],
+  b.[text] AS [WaitingCommandText],
+  b.[row_count] AS [WaitingCommandRowCount],
+  b.[percent_complete] AS [WaitingCommandPercentComplete],
+  b.[cpu_time] AS [WaitingCommandCPUTime],
+  b.[total_elapsed_time] AS [WaitingCommandTotalElapsedTime],
+  b.[reads] AS [WaitingCommandReads],
+  b.[writes] AS [WaitingCommandWrites],
+  b.[logical_reads] AS [WaitingCommandLogicalReads],
+  b.[query_plan] AS [WaitingCommandQueryPlan],
+  b.[plan_handle] AS [WaitingCommandPlanHandle]
+FROM [Blocking] b
+INNER JOIN [sys].[dm_exec_sessions] s1
+  ON b.[blocking_session_id] = s1.[session_id]
+INNER JOIN [sys].[dm_tran_locks] t
+  ON t.[request_session_id] = b.[session_id]
+WHERE t.[request_status] = 'WAIT'
+GO