functions/Get-DbaCpuUsage.ps1
|
function Get-DbaCpuUsage { <# .SYNOPSIS Provides detailed CPU usage information about a SQL Server's process .DESCRIPTION "If there are a lot of processes running on your instance and the CPU is very high, then it's hard to find the exact process eating up your CPU using just the SQL Server tools. One way to correlate the data between what is running within SQL Server and at the Windows level is to use SPID and KPID values to get the exact process." This command automates that process. References: https://www.mssqltips.com/sqlservertip/2454/how-to-find-out-how-much-cpu-a-sql-server-process-is-really-using/ Note: This command returns results from all SQL instances on the destination server but the process column is specific to -SqlInstance passed. .PARAMETER SqlInstance Allows you to specify a comma separated list of servers to query. .PARAMETER SqlCredential Allows you to login to the SQL instance using alternative credentials. .PARAMETER Credential Allows you to login to the Windows Server using alternative credentials. .PARAMETER Threshold CPU threshold. .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: Chrissy LeMaire (@cl), netnerds.net Website: https://dbatools.io Copyright (c) 2018 by dbatools, licensed under MIT License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Get-DbaCpuUsage .EXAMPLE PS C:\> Get-DbaCpuUsage -SqlInstance sql2017 Logs into the SQL Server instance "sql2017" and also the Computer itself (via WMI) to gather information .EXAMPLE PS C:\> $usage = Get-DbaCpuUsage -SqlInstance sql2017 PS C:\> $usage.Process Explores the processes (from Get-DbaProcess) associated with the usage results .EXAMPLE PS C:\> Get-DbaCpuUsage -SqlInstance sql2017 -SqlCredential (Get-Credential sqladmin) -Credential (Get-Credential ad\sqldba) Logs into the SQL instance using the SQL Login 'sqladmin' and then Windows instance as 'ad\sqldba' #> [CmdletBinding()] param ( [parameter(Mandatory, ValueFromPipeline)] [Alias("ServerInstance", "SqlServer", "SqlServers")] [DbaInstanceParameter[]]$SqlInstance, [PSCredential]$SqlCredential, [PSCredential]$Credential, [int]$Threshold = 0, [switch]$EnableException ) begin { # This can likely be enumerated but I don't know hows $threadstates = [pscustomobject]@{ 0 = 'Initialized. It is recognized by the microkernel.' 1 = 'Ready. It is prepared to run on the next available processor.' 2 = 'Running. It is executing.' 3 = 'Standby. It is about to run. Only one thread may be in this state at a time.' 4 = 'Terminated. It is finished executing.' 5 = 'Waiting. It is not ready for the processor. When ready, it will be rescheduled.' 6 = 'Transition. The thread is waiting for resources other than the processor.' 7 = 'Unknown. The thread state is unknown.' } $threadwaitreasons = [pscustomobject]@{ 0 = 'Executive' 1 = 'FreePage' 2 = 'PageIn' 3 = 'PoolAllocation' 4 = 'ExecutionDelay' 5 = 'FreePage' 6 = 'PageIn' 7 = 'Executive' 8 = 'FreePage' 9 = 'PageIn' 10 = 'PoolAllocation' 11 = 'ExecutionDelay' 12 = 'FreePage' 13 = 'PageIn' 14 = 'EventPairHigh' 15 = 'EventPairLow' 16 = 'LPCReceive' 17 = 'LPCReply' 18 = 'VirtualMemory' 19 = 'PageOut' 20 = 'Unknown' } } process { foreach ($instance in $SqlInstance) { try { Write-Message -Level Verbose -Message "Connecting to $instance" $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $sqlcredential } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } $processes = Get-DbaProcess -SqlInstance $server $threads = Get-DbaCmObject -ComputerName $instance.ComputerName -ClassName Win32_PerfFormattedData_PerfProc_Thread -Credential $Credential | Where-Object { $_.Name -like 'sql*' -and $_.PercentProcessorTime -ge $Threshold } if ($server.VersionMajor -eq 8) { $spidcollection = $server.Query("select spid, kpid from sysprocesses") } else { $spidcollection = $server.Query("select t.os_thread_id as kpid, s.session_id as spid from sys.dm_exec_sessions s join sys.dm_exec_requests er on s.session_id = er.session_id join sys.dm_os_workers w on er.task_address = w.task_address join sys.dm_os_threads t on w.thread_address = t.thread_address") } foreach ($thread in $threads) { $spid = ($spidcollection | Where-Object kpid -eq $thread.IDThread).spid $process = $processes | Where-Object spid -eq $spid $threadwaitreason = $thread.ThreadWaitReason $threadstate = $thread.ThreadState $ThreadStateValue = $threadstates.$threadstate $ThreadWaitReasonValue = $threadwaitreasons.$threadwaitreason Add-Member -Force -InputObject $thread -MemberType NoteProperty -Name ComputerName -value $server.ComputerName Add-Member -Force -InputObject $thread -MemberType NoteProperty -Name InstanceName -value $server.ServiceName Add-Member -Force -InputObject $thread -MemberType NoteProperty -Name SqlInstance -value $server.DomainInstanceName Add-Member -Force -InputObject $thread -MemberType NoteProperty -Name Processes -Value ($processes | Where-Object HostProcessID -eq $thread.IDProcess) Add-Member -Force -InputObject $thread -MemberType NoteProperty -Name ThreadStateValue -Value $ThreadStateValue Add-Member -Force -InputObject $thread -MemberType NoteProperty -Name ThreadWaitReasonValue -Value $ThreadWaitReasonValue Add-Member -Force -InputObject $thread -MemberType NoteProperty -Name Process -Value $process Add-Member -Force -InputObject $thread -MemberType NoteProperty -Name Query -Value $process.LastQuery Add-Member -Force -InputObject $thread -MemberType NoteProperty -Name Spid -Value $spid Select-DefaultView -InputObject $thread -Property ComputerName, InstanceName, SqlInstance, Name, ContextSwitchesPersec, ElapsedTime, IDProcess, Spid, PercentPrivilegedTime, PercentProcessorTime, PercentUserTime, PriorityBase, PriorityCurrent, StartAddress, ThreadStateValue, ThreadWaitReasonValue, Process, Query } } } } |