functions/Get-DbaSpinLockStatistic.ps1
function Get-DbaSpinLockStatistic { <# .SYNOPSIS Displays information from sys.dm_os_spinlock_stats. Works on SQL Server 2008 and above. .DESCRIPTION This command is based off of Paul Randal's post "Advanced SQL Server performance tuning" Returns: SpinLockName Collisions Spins SpinsPerCollision SleepTime Backoffs Reference: https://www.sqlskills.com/blogs/paul/advanced-performance-troubleshooting-waits-latches-spinlocks/ .PARAMETER SqlInstance The SQL Server instance. Server version must be SQL Server version 2008 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 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: Diagnostic, SpinLockStatistics, Waits Author: Patrick Flynn (@sqllensman) Website: https://dbatools.io Copyright: (c) 2018 by dbatools, licensed under MIT License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Get-DbaSpinLockStatistic .EXAMPLE PS C:\> Get-DbaSpinLockStatistic -SqlInstance sql2008, sqlserver2012 Get SpinLock Statistics for servers sql2008 and sqlserver2012. .EXAMPLE PS C:\> $output = Get-DbaSpinLockStatistic -SqlInstance sql2008 | Select-Object * | ConvertTo-DbaDataTable Collects all SpinLock Statistics on server sql2008 into a Data Table. .EXAMPLE PS C:\> 'sql2008','sqlserver2012' | Get-DbaSpinLockStatistic Get SpinLock Statistics for servers sql2008 and sqlserver2012 via pipline .EXAMPLE PS C:\> $cred = Get-Credential sqladmin PS C:\> Get-DbaSpinLockStatistic -SqlInstance sql2008 -SqlCredential $cred Connects using sqladmin credential and returns SpinLock Statistics from sql2008 #> [CmdletBinding()] Param ( [parameter(Mandatory, ValueFromPipeline)] [DbaInstance[]]$SqlInstance, [PSCredential]$SqlCredential, [switch]$EnableException ) BEGIN { $sql = "SELECT name, collisions, spins, spins_per_collision, sleep_time, backoffs FROM sys.dm_os_spinlock_stats;" Write-Message -Level Debug -Message $sql } process { if (Test-FunctionInterrupt) { return } foreach ($instance in $SqlInstance) { try { $server = Connect-DbaInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 10 } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } foreach ($row in $server.Query($sql)) { [PSCustomObject]@{ ComputerName = $server.ComputerName InstanceName = $server.ServiceName SqlInstance = $server.DomainInstanceName SpinLockName = $row.name Collisions = $row.collisions Spins = $row.spins SpinsPerCollision = $row.spins_per_collision SleepTime = $row.sleep_time Backoffs = $row.backoffs } } } } } # 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