functions/Get-DbaWaitingTask.ps1
|
function Get-DbaWaitingTask { <# .SYNOPSIS Displays waiting task. .DESCRIPTION This command is based on waiting task T-SQL script published by Paul Randal. Reference: https://www.sqlskills.com/blogs/paul/updated-sys-dm_os_waiting_tasks-script-2/ .PARAMETER SqlInstance The target SQL Server instance or instances. Server version must be SQL Server version XXXX or higher. .PARAMETER SqlCredential Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential). Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported. For MFA support, please use Connect-DbaInstance. .PARAMETER Spid Find the waiting task of one or more specific process ids .PARAMETER IncludeSystemSpid If this switch is enabled, the output will include the system sessions. .PARAMETER EnableException By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message. This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting. Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch. .NOTES Tags: Waits,Task,WaitTask Author: Shawn Melton (@wsmelton), https://wsmelton.github.io Website: https://dbatools.io Copyright: (c) 2018 by dbatools, licensed under MIT License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Get-DbaWaitingTask .EXAMPLE PS C:\> Get-DbaWaitingTask -SqlInstance sqlserver2014a Returns the waiting task for all sessions on sqlserver2014a .EXAMPLE PS C:\> Get-DbaWaitingTask -SqlInstance sqlserver2014a -IncludeSystemSpid Returns the waiting task for all sessions (user and system) on sqlserver2014a #> [CmdletBinding()] param ( [parameter(Mandatory, ValueFromPipeline)] [DbaInstance[]]$SqlInstance, [PSCredential]$SqlCredential, [parameter(ValueFromPipelineByPropertyName)] [object[]]$Spid, [switch]$IncludeSystemSpid, [switch]$EnableException ) begin { $sql = " SELECT [owt].[session_id] AS [Spid], [owt].[exec_context_id] AS [Thread], [ot].[scheduler_id] AS [Scheduler], [owt].[wait_duration_ms] AS [WaitMs], [owt].[wait_type] AS [WaitType], [owt].[blocking_session_id] AS [BlockingSpid], [owt].[resource_description] AS [ResourceDesc], CASE [owt].[wait_type] WHEN N'CXPACKET' THEN RIGHT ([owt].[resource_description], CHARINDEX (N'=', REVERSE ([owt].[resource_description])) - 1) ELSE NULL END AS [NodeId], [eqmg].[dop] AS [Dop], [er].[database_id] AS [DbId], [est].text AS [SqlText], [eqp].[query_plan] AS [QueryPlan], CAST ('https://www.sqlskills.com/help/waits/' + [owt].[wait_type] as XML) AS [URL] FROM sys.dm_os_waiting_tasks [owt] INNER JOIN sys.dm_os_tasks [ot] ON [owt].[waiting_task_address] = [ot].[task_address] INNER JOIN sys.dm_exec_sessions [es] ON [owt].[session_id] = [es].[session_id] INNER JOIN sys.dm_exec_requests [er] ON [es].[session_id] = [er].[session_id] FULL JOIN sys.dm_exec_query_memory_grants [eqmg] ON [owt].[session_id] = [eqmg].[session_id] OUTER APPLY sys.dm_exec_sql_text ([er].[sql_handle]) [est] OUTER APPLY sys.dm_exec_query_plan ([er].[plan_handle]) [eqp] WHERE [es].[is_user_process] = $(if (Test-Bound 'IncludeSystemSpid') {0} else {1}) ORDER BY [owt].[session_id], [owt].[exec_context_id] OPTION(RECOMPILE);" } process { foreach ($instance in $SqlInstance) { try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 9 } catch { Stop-Function -Message "Error occurred while establishing connection to $instance" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } $results = $server.Query($sql) foreach ($row in $results) { if (Test-Bound 'Spid') { if ($row.Spid -notin $Spid) { continue } } [PSCustomObject]@{ ComputerName = $server.ComputerName InstanceName = $server.ServiceName SqlInstance = $server.DomainInstanceName Spid = $row.Spid Thread = $row.Thread Scheduler = $row.Scheduler WaitMs = $row.WaitMs WaitType = $row.WaitType BlockingSpid = $row.BlockingSpid ResourceDesc = $row.ResourceDesc NodeId = $row.NodeId Dop = $row.Dop DbId = $row.DbId SqlText = $row.SqlText QueryPlan = $row.QueryPlan InfoUrl = $row.InfoUrl } | Select-DefaultView -ExcludeProperty 'SqlText', 'QueryPlan', 'InfoUrl' } } } } |