functions/Get-DbaCpuRingBuffer.ps1
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function Get-DbaCpuRingBuffer { <# .SYNOPSIS Collects CPU data from sys.dm_os_ring_buffers. Works on SQL Server 2005 and above. .DESCRIPTION This command is based off of Glen Berry's diagnostic query for average CPU The sys.dm_os_ring_buffers stores the average CPU utilization history by the current instance of SQL Server, plus the summed average CPU utilization by all other processes on your machine are captured in one minute increments for the past 256 minutes. Reference: https://www.sqlskills.com/blogs/glenn/sql-server-diagnostic-information-queries-detailed-day-16// .PARAMETER SqlInstance Allows you to specify a comma separated list of servers to query. .PARAMETER SqlCredential Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use: $cred = Get-Credential, this pass this $cred to the param. Windows Authentication will be used if DestinationSqlCredential is not specified. To connect as a different Windows user, run PowerShell as that user. .PARAMETER CollectionMinutes Allows you to specify a Collection Period in Minutes. Default is 60 minutes .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: CPU 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-DbaCpuRingBuffer .EXAMPLE PS C:\> Get-DbaCpuRingBuffer -SqlInstance sql2008, sqlserver2012 Gets CPU Statistics from sys.dm_os_ring_buffers for servers sql2008 and sqlserver2012 for last 60 minutes. .EXAMPLE PS C:\> Get-DbaCpuRingBuffer -SqlInstance sql2008 -CollectionMinutes 240 Gets CPU Statistics from sys.dm_os_ring_buffers for server sql2008 for last 240 minutes .EXAMPLE PS C:\> $output = Get-DbaCpuRingBuffer -SqlInstance sql2008 -CollectionMinutes 240 | Select * | ConvertTo-DbaDataTable Gets CPU Statistics from sys.dm_os_ring_buffers for server sql2008 for last 240 minutes into a Data Table. .EXAMPLE PS C:\> 'sql2008','sql2012' | Get-DbaCpuRingBuffer Gets CPU Statistics from sys.dm_os_ring_buffers for servers sql2008 and sqlserver2012 .EXAMPLE PS C:\> $cred = Get-Credential sqladmin PS C:\> Get-DbaCpuRingBuffer -SqlInstance sql2008 -SqlCredential $cred Connects using sqladmin credential and returns CPU Statistics from sys.dm_os_ring_buffers from sql2008 #> [CmdletBinding()] Param ( [parameter(Mandatory, ValueFromPipeline)] [Alias("ServerInstance", "SqlServer", "SqlServers")] [DbaInstance[]]$SqlInstance, [PSCredential]$SqlCredential, [int]$CollectionMinutes = 60, [Alias('Silent')] [switch]$EnableException ) process { if (Test-FunctionInterrupt) { return } foreach ($instance in $SqlInstance) { Write-Message -Level Verbose -Message "Attempting to connect to $instance" try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 9 } catch { Stop-Function -Message "Error occured while establishing connection to $instance" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } if ($server.VersionMajor -gt 9) { $currentTimestamp = ($server.Query("SELECT cpu_ticks / CONVERT (float, ( cpu_ticks / ms_ticks )) as TimeStamp FROM sys.dm_os_sys_info"))[0] } else { $currentTimestamp = ($server.Query("SELECT cpu_ticks / CONVERT(FLOAT, cpu_ticks_in_ms) as TimeStamp FROM sys.dm_os_sys_info"))[0] } Write-Message -Level Verbose -Message "Using current timestampe of $currentTimestamp" $sql = "With RingBufferSchedulerMonitor as ( SELECT timestamp, CONVERT(xml, record) AS record FROM sys.dm_os_ring_buffers WHERE (ring_buffer_type = N'RING_BUFFER_SCHEDULER_MONITOR') AND (record LIKE '%%') ), RingBufferSchedulerMonitorValues as ( SELECT record.value('(./Record/@id)[1]', 'int') AS record_id, record.value('(./Record/SchedulerMonitorEvent/SystemHealth/SystemIdle)[1]', 'int') AS SystemIdle, record.value('(./Record/SchedulerMonitorEvent/SystemHealth/ProcessUtilization)[1]', 'int') AS SQLProcessUtilization, timestamp, DATEADD(ss, (-1 * ($currentTimestamp - [timestamp]))/1000, GETDATE()) AS EventTime FROM RingBufferSchedulerMonitor ) Select SERVERPROPERTY('ServerName') as ServerName, record_id, EventTime, SQLProcessUtilization, SystemIdle, 100 - SystemIdle - SQLProcessUtilization AS OtherProcessUtilization From RingBufferSchedulerMonitorValues WHERE EventTime> DATEADD(MINUTE, -$CollectionMinutes, GETDATE()) ;" Write-Message -Level Verbose -Message "Executing Sql Staement: $sql" foreach ($row in $server.Query($sql)) { [PSCustomObject]@{ ComputerName = $server.NetName InstanceName = $server.ServiceName SqlInstance = $server.DomainInstanceName RecordId = $row.record_id EventTime = $row.EventTime SQLProcessUtilization = $row.SQLProcessUtilization OtherProcessUtilization = $row.OtherProcessUtilization SystemIdle = $row.SystemIdle } } } } } |