functions/Get-DbaPlanCache.ps1
|
function Get-DbaPlanCache { <# .SYNOPSIS Provides information about adhoc and prepared plan cache usage .DESCRIPTION Checks ahoc and prepared plan cache for each database, if over 100 MBS you should consider you using Remove-DbaQueryPlan to clear the plan caches or turning on optimize for adhoc workloads configuration is running 2008 or later. References: https://www.sqlskills.com/blogs/kimberly/plan-cache-adhoc-workloads-and-clearing-the-single-use-plan-cache-bloat/ Note: This command returns results from all SQL server instances on the destination server but the process column is specific to -SqlInstance passed. .PARAMETER SqlInstance The target SQL Server instance. .PARAMETER SqlCredential Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential) .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: Memory Author: Tracy Boggiano, databasesuperhero.com dbatools PowerShell module (https://dbatools.io, clemaire@gmail.com) Copyright (C) 2016 Chrissy LeMaire License: GNU GPL v3 https://opensource.org/licenses/GPL-3.0 .LINK https://dbatools.io/Get-DbaPlanCache .EXAMPLE PS C:\> Get-DbaPlanCache -SqlInstance sql2017 Returns the single use plan cache usage information for SQL Server instance 2017 .EXAMPLE PS C:\> Get-DbaPlanCache -SqlInstance sql2017 Returns the single use plan cache usage information for SQL Server instance 2017 .EXAMPLE PS C:\> Get-DbaPlanCache -SqlInstance sql2017 -SqlCredential (Get-Credential sqladmin) Returns the single use plan cache usage information for SQL Server instance 2017 using login 'sqladmin' #> [CmdletBinding()] param ( [parameter(Mandatory, ValueFromPipeline)] [Alias("ServerInstance", "SqlServer", "SqlServers")] [DbaInstanceParameter[]]$SqlInstance, [PSCredential]$SqlCredential, [switch]$EnableException ) begin { $Sql = "SELECT SERVERPROPERTY('MachineName') AS ComputerName, ISNULL(SERVERPROPERTY('InstanceName'), 'MSSQLSERVER') AS InstanceName, SERVERPROPERTY('ServerName') AS SqlInstance, MB = SUM(CAST((CASE WHEN usecounts = 1 AND objtype IN ('Adhoc', 'Prepared') THEN size_in_bytes ELSE 0 END) AS DECIMAL(12, 2))) / 1024 / 1024, UseCount = SUM(CASE WHEN usecounts = 1 AND objtype IN ('Adhoc', 'Prepared') THEN 1 ELSE 0 END) FROM sys.dm_exec_cached_plans;" } process { foreach ($instance in $SqlInstance) { try { Write-Message -Level Verbose -Message "Connecting to $instance" $server = Connect-DbaInstance -SqlInstance $instance -SqlCredential $sqlcredential } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } $results = $server.Query($sql) $size = [dbasize]($results.MB*1024*1024) Add-Member -Force -InputObject $results -MemberType NoteProperty -Name Size -Value $size Select-DefaultView -InputObject $results -Property ComputerName, InstanceName, SqlInstance, Size, UseCount } } } |