How to check app pool last recycled

Question

is it possible to check when i recycled the app pool last time, i want to check the date when my app pool was last recycled, is there anything in IIS i can get this info.

Answer 1

Get the worker process uptime(Recommended):

$poolName = 
$poolProcess =(gwmi -NS 'root\WebAdministration' -class 'WorkerProcess' | select AppPoolName,ProcessId | Where-Object { $_.AppPoolName -eq $poolName } )

$lastStartTime=(Get-Process -Id $poolProcess.ProcessId).StartTime
write-output $lastStartTime

For it to work, make sure you have 'IIS management scripts and tools' enabled.

Second, way is using Event log, if enabled

Get-Eventlog -LogName system -Newest 1 -Source "WAS" -Message "*recycle of all worker processes in application pool '$poolName'*")

With Get-Eventlog you can use -After/-Before argument to further limit the result.

To check if Application pool is recycled in last 'X' minutes, following powershell snippet can be used:

function isRecycledInLastNMinutes($appPoolName, $lminutes){
    $beforeDate = Get-Date -format 'u'
    $afterDate = $beforeDate.addMinutes(-$lminutes)
    $result = (Get-Eventlog -LogName system -Newest 1 -Source "WAS" -After $afterDate -Before $beforeDate -Message "*recycle of all worker processes in application pool '$appPoolName'*")
    if( $result.length -eq 1){
        return $true
    }else{
        retrun $false
    }
}