functions/Clear-DbaWaitStatistics.ps1
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function Clear-DbaWaitStatistics { <# .SYNOPSIS Clears wait statistics .DESCRIPTION Reset the aggregated statistics - basically just executes DBCC SQLPERF (N'sys.dm_os_wait_stats', CLEAR) .PARAMETER SqlInstance Allows you to specify a comma separated list of servers to query. .PARAMETER SqlCredential Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential) .PARAMETER WhatIf If this switch is enabled, no actions are performed but informational messages will be displayed that explain what would happen if the command were to run. .PARAMETER Confirm If this switch is enabled, you will be prompted for confirmation before executing any operations that change state. .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: WaitStatistic, Waits Author: Chrissy LeMaire (@cl) Website: https://dbatools.io Copyright: (C) Chrissy LeMaire, clemaire@gmail.com License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Clear-DbaWaitStatistics .EXAMPLE PS C:\> Clear-DbaWaitStatistics -SqlInstance sql2008, sqlserver2012 After confirmation, clears wait stats on servers sql2008 and sqlserver2012 .EXAMPLE PS C:\> Clear-DbaWaitStatistics -SqlInstance sql2008, sqlserver2012 -Confirm:$false Clears wait stats on servers sql2008 and sqlserver2012, without prompting #> [CmdletBinding(ConfirmImpact = 'High', SupportsShouldProcess)] param ( [parameter(Position = 0, Mandatory, ValueFromPipeline)] [Alias("ServerInstance", "SqlServer", "SqlServers")] [DbaInstance[]]$SqlInstance, [PSCredential]$SqlCredential, [Alias('Silent')] [switch]$EnableException ) process { foreach ($instance in $SqlInstance) { Write-Message -Level Verbose -Message "Connecting to $instance" try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 9 } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } if ($Pscmdlet.ShouldProcess($instance, "Performing CLEAR of sys.dm_os_wait_stats")) { try { $server.Query("DBCC SQLPERF (N'sys.dm_os_wait_stats', CLEAR);") $status = "Success" } catch { $status = $_.Exception } [PSCustomObject]@{ ComputerName = $server.ComputerName InstanceName = $server.ServiceName SqlInstance = $server.DomainInstanceName Status = $status } } } } } |