![]() ![]() $DataSet.Tables | Export-Csv -Delimiter ' ' -Path "$OuputFolder\lock_waits_$(get-date -f yyyy-MM-dd-HH.mm.ss).csv" -NoTypeInformation #Create the objects that will be used to run the queries $SqlConnection.ConnectionString = "Server = $SQLServer Database = $SQLDBName User ID = $SQLUsername Password = $SQLPassword" $SqlQuer圓 = "select CURRENT_TIMESTAMP as timestamp, as server_name, DB_NAME() as database_name, as session_id " #Dummy query to test if queries are running successfully, in case the previous ones do not return data INNER JOIN sys.dm_tran_locks locks on osw.blocking_session_id = locks.request_session_id or (osw.session_id = locks.request_session_id and osw.blocking_session_id is not null) ![]() , locks.resource_type, locks.resource_subtype Select DB_NAME(locks.resource_database_id) AS database_name #To get the locks that are being held by the sessions that are blocking and being blocked OUTER APPLY sys.dm_exec_input_buffer(osw.blocking_session_id,0) as blocker_sqltext2 " OUTER APPLY sys.dm_exec_sql_text(blocker_req.sql_handle) AS blocker_sqltext LEFT JOIN sys.dm_tran_session_transactions blocker_tran on blocker_ssion_id =osw.blocking_session_id LEFT JOIN sys.dm_exec_sessions blocker_ses on blocker_ses.session_id = osw.blocking_session_id ![]() LEFT JOIN sys.dm_exec_requests blocker_req on blocker_req.session_id = osw.blocking_session_id INNER JOIN dbo.sysprocesses blocker_proc on osw.blocking_session_id = blocker_proc.spid LEFT JOIN sys.dm_tran_session_transactions blocked_tran on blocked_ssion_id =req.session_id INNER JOIN sys.dm_os_waiting_tasks osw on osw.session_id = req.session_id INNER JOIN sys.dm_tran_locks dtl on dtl.request_session_id = req.session_id INNER JOIN sys.dm_exec_sessions ses on ses.session_id = req.session_idĬROSS APPLY sys.dm_exec_sql_text(req.sql_handle) AS sqltext , osw.resource_description AS taskResourceDescription , dtl.resource_subtype AS lockResourceSubType , blocker_ansaction_id blocker_transaction_id , blocker_proc.open_tran blocker_open_tran , blocker_proc.last_batch blocker_last_batch , blocker_proc.lastwaittype blocker_last_waittype , blocker_req.total_elapsed_time AS blocker_totalElapsedTime , blocker_req.cpu_time AS blocker_cpuTime , REPLACE(REPLACE(iif(blocker_sqltext.TEXT is NULL,blocker_sqltext2.event_info,blocker_sqltext.TEXT), CHAR(13), ' '), CHAR(10), ' ') AS blocker_last_query ![]() , CASE blocker_ses.transaction_isolation_level , blocker_ses.program_name blocker_programName , osw.blocking_session_id AS blocker_SessionID , blocked_ansaction_id blocked_transaction_id , req.total_elapsed_time AS blocked_totalElapsedTime , REPLACE(REPLACE(sqltext.TEXT, CHAR(13), ' '), CHAR(10), ' ') AS blocked_last_query , DB_NAME(dtl.resource_database_id) AS database_name $SqlQuery = "SELECT current_timestamp as #To get information about sessions that are blocking and being blocked It will create CSVs with the result of the queries in the $OutputFolder. Note: It is necessary to set values for the highlighted variables. You can use the PowerShell script below, while attempting to connect, to identify the session that is causing the block: If one of the queries performed by SSMS is blocked, you may face a lock time-out in the connection: Sometimes, this issue could happen to performance issues.When you connect to the database using SQL Server Management Studio (SSMS), It will perform several queries to gather the information necessary for the user interface. Finally, after this 10 seconds we are going to receive this error message meanwhile we don't execute the commit transaction of the execution of CREATE TABLE.Following our article here: Lesson Learned #22: How to identify blocking issues? - Microsoft Community Hub you could find the blocking issue: As sys.tables is now blocking by a previous CREATE TABLE instrucction we have to wait to release this blocking.Following the instrucctions, SSMS specified SET LOCK TIMEOUT 10000 and after it try to execute the query: SELECT SCHEMA_NAME(tbl.schema_id) AS, tbl.name AS, tbl.object_id AS FROM sys.tables AS tbl ORDER BY ASC, ASC.Third, go to the Object Explorer and try to expand tables and after around 10 seconds you are going to have the error message:įirst, let's investigate what is doing SQL Server Management Studio to fill up the list of the tables, using SQL Server Profiler of Azure Data Studio. Second, modify the SET LOCK TIMEOUT in SQL Server Management Studio->Tools->Options->Query Execution->SQL Server->Advanced change the SET LOCK TIMEOUT from -1 to 10000 miliseconds. The first thing is to run a transaction without adding commit transaction, for example: Following I would like to share with you some details about this issue and how to find and fix it. (.Net SqlClient Data Provider) using SQL Server Management Studio. Today, we got a service request that our customer got the following error message: Lock request time out period exceeded. ![]()
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