Time CPU Ready for terminal servers

I just started a job last week and my first task is to examine the virtual infrastructure. The first thing that stood out to me was our Terminal Server cluster configuration. For example, we have an ESXi host (in this cluster) with 12 physical processors and 24 logical processors. This host ESXi as eight Terminal Server computers virtual running on it. Seven of these Terminal servers have 12vCPUs EACH! The other has 8 vCPUs. When I look each time loan of virtual machines on average CPU during the week, averages of these varied from 10% on the lower end to 13% on the high end. Again, I take vCenter Performance averages. The maximum rates are much higher than that. The ratio goes down to about 3.8 vCPUs each logical processor.

I would like to know if this time there ready CPU seems high to someone else, and what have you seen that average delays in loan CPU in environments with Terminal servers of your VM? I know that the issue involved applications and environment everyone will be different, but I'm looking for a little guidance.

Thanks in advance!

Ouch.

I always raise an eyebrow, when someone mentions that they 'need' more than 2 vCPU on a server terminal server.
RDS and Citrix servers receive scale vs scale up.  Multiple virtual machines with 2-4 vCPU and 8-12 GB of memory.  Of course, there is that of outliers but servers Citrix typical application has hit a sweet spot in the Gb 2 vCPU/8-12 range.

3/1 the ratios are pretty typical.

Must love ESXtop. Discover the bible ESX here.

Esxtop statistical interpretation

I would say between 5-10 is getting 'high' % RDY.  But it is really end user experience as well.  Users experience performance problems?  The usual causes of high allowances are a lack of understand how to properly change a virtual machine for the workload.  Often other problems are the root cause, but virtual memory and CPU are the easiest thing to just throw to solve the problem. Networking and storage for example are often the root causes.

Other things, I'd be curious to know.

  • Did you by chance in a Resource Pool?
  • Are there limits to any CPU together on these virtual machines or you see no MLMTD % figures appearing for these virtual machines?
  • You see figures of the CSTP % for one of your virtual machines?

I just took a peek at a sample of about 20 servers Citrix on one of our guests and we see % times of the RDY to .0x to the values of X 1.4.

My suggestion would be to stop some VM, select hot and a sample group up to of 2vCPU and have users test performance while you keep a watchful eye on ESXtop.

I hope this helps!

Tags: VMware

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    $weekReadystat = $Groupedweekstats | Where {$_.} Name - eq "cpu.ready.summation"} | Select-Object - ExpandProperty group | Measure-object-value average | Select-Object - ExpandProperty average

    $weekreadyvalue = [math]: tour ($(($weekReadystat / (1800 * 1000)) * 100), 2)

    $Groupedmonthstats is entity-Stat-get $vm - Stat $Stattypes - beginning (get-date). AddDays(-30)-done (get-date) - IntervalMins 120 - Instance ""-ErrorAction SilentlyContinue | MetricId Group-Object

    $monthCPUAverageStat = '{0:N2}' f $($Groupedmonthstats |) Where {$_.} Name - eq "cpu.usage.average"} | Select-Object - ExpandProperty group | Measure-object-value average | Select - Object - ExpandProperty average)

    $monthCPUUsageMhzStat = '{0:N2}' f $($Groupedmonthstats |) Where {$_.} Name - eq "cpu.usagemhz.average"} | Select-Object - ExpandProperty group | Measure-object-value average | Select - Object - ExpandProperty average)

    $monthReadystat = $Groupedmonthstats | Where {$_.} Name - eq "cpu.ready.summation"} | Select-Object - ExpandProperty group | Measure-object-value average | Select-Object - ExpandProperty average

    $monthreadyvalue = [math]: tour ($(($monthReadystat / (7200 * 1000)) * 100), 2)

    $Groupedyearstats is entity-Stat-get $vm - Stat $Stattypes - beginning (get-date). AddDays(-365)-done (get-date) - IntervalMins 1440 - Instance ""-ErrorAction SilentlyContinue | MetricId Group-Object

    $yearCPUAverageStat = '{0:N2}' f $($Groupedyearstats |) Where {$_.} Name - eq "cpu.usage.average"} | Select-Object - ExpandProperty group | Measure-object-value average | Select - Object - ExpandProperty average)

    $yearCPUUsageMhzStat = '{0:N2}' f $($Groupedyearstats |) Where {$_.} Name - eq "cpu.usagemhz.average"} | Select-Object - ExpandProperty group | Measure-object-value average | Select - Object - ExpandProperty average)

    $yearReadystat = $Groupedyearstats | Where {$_.} Name - eq "cpu.ready.summation"} | Select-Object - ExpandProperty group | Measure-object-value average | Select-Object - ExpandProperty average

    $yearreadyvalue = [math]: tour ($(($yearReadystat / (86400 * 1000)) * 100), 2)

    $data = New-Object psobject

    $data | Add-Member - MemberType NoteProperty-VM name-value $vm.name

    $data | Add-Member - MemberType NoteProperty-name VMTotalCPUs-value $VMCPUNumCpu

    $data | Add-Member - MemberType NoteProperty-name VMTotalCPUSockets-value $VMCPUSockets

    $data | Add-Member - MemberType NoteProperty-name VMTotalCPUCores-value $VMCPUCores

    $data | Add-Member - MemberType NoteProperty-Name ' in time real average usage % "-value $RealTimeCPUAverageStat

    $data | Add-Member - MemberType NoteProperty-name "Mhz real-time use" - value $RealTimeCPUUsageMhzStat

    $data | Add-Member - MemberType NoteProperty-Name "loans in time real %"-value $RealTimereadyvalue

    $data | Add-Member - MemberType NoteProperty-name ' day average use % "-value $dayCPUAverageStat

    $data | Add-Member - MemberType NoteProperty-name of the "day use Mhz"-value $dayCPUUsageMhzStat

    $data | Add-Member - MemberType NoteProperty-Name "ready day %"-value $dayreadyvalue

    $data | Add-Member - MemberType NoteProperty-"week average use name% '-value $weekCPUAverageStat

    $data | Add-Member - MemberType NoteProperty-Name "week use Mhz"-value $weekCPUUsageMhzStat

    $data | Add-Member - MemberType NoteProperty-"week loan name% '-value $weekreadyvalue

    $data | Add-Member - MemberType NoteProperty-' months average use name% '-value $monthCPUAverageStat

    $data | Add-Member - MemberType NoteProperty-Name "month use Mhz"-value $monthCPUUsageMhzStat

    $data | Add-Member - MemberType NoteProperty-' months loan name% '-value $monthreadyvalue

    $data | Add-Member - MemberType NoteProperty-name ' year average use % "-value $yearCPUAverageStat

    $data | Add-Member - MemberType NoteProperty-name ' year use Mhz "-value $yearCPUUsageMhzStat

    $data | Add-Member - MemberType NoteProperty-Name "ready year % '-value $yearreadyvalue

    $data | Add-Member - MemberType NoteProperty - name VMHost-$esxi.name value

    $data | Add-Member - MemberType NoteProperty-name VMHostCPUSockets-value $esxiCPUSockets

    $data | Add-Member - MemberType NoteProperty-name VMHostCPUCores-value $esxiCPUCores

    $data | Add-Member - MemberType NoteProperty-name TotalVMhostCPUs-value $TotalesxiCPUs

    $data

    } #foreach ($vm in $vmlist)

    } #foreach ($esxi in $(Get-VMHost $Name))

    } #process

    } #Function-prepare you

    Get-VMHost | Get ready

  • Question about on VM consolidation number and percentage of CPU Ready

    Hi people,

    I'm trying to consolidate as many VM in simple ESXi servers on HP on AMD Opteron blades with 32 CPU available logic (based on the number on the vSphere console)

    Can anyone here please share some thoughts and comments about what is the best indication to avoid adding more VMS that ESXi hosts can treat?

    I must ensure that the number of vCPU altogether exceed is not 32 logic processor available, or it can be more than that?

    Running a script powershell LucD to collect CPU ready percentage shows that some virtual machines had prepared more than 10% CPU (for the most part 2 x vCPU) up to 22% (this one with 8 x vCPU)

    Hello

    I had the same situation on HP Blade and DL serer with two different CPU vendors.

    Intel CPU based on my experiences, has better performance compared to AMD CPU when the CPU is too committed on ESXi server.

    I have HP BL460c G6 and G7 on one of our sites, the server has 12 physical and 24 cores logic core.

    I assigned four cores to each customers (to fix the voice problem) and virtual machines are working properly, RDY CPU is less than 5% in general and there is no performance problem.

    Each blade server hosts 20 VMs and total virtual cores are 80 cores, so we attribute 1:3 (Physics: virtual) core.

    On the other hand, I DL585 G7 on our sites some server has 64 physical cores (4 Sockets and each catches have 16 cores). Servers host 50 active VMs usually but RDY CPU is greater than 10% or 7% on them. Total virtual cores are 200 and CPU assignment ratio is 3.

    I think that, if you want to optimize performance on AMD CPU, 1:1 or 1:2 CPU assignment report is the best choice.

  • CPU.ready.summation of measurement when cpu.usage.average max

    Hi, I'm new in powercli,

    I use the following script to get cpu.usage.average mem.usage.average min, average, max, and the maximum of cpu.ready.summation

    I would like to correct also the cpu.ready.summation when the cpu.usage.average is max, and I can't!

    Here is my script:

    $allvms = @)
    $vms = get - Vm
    {foreach ($vm to $vms)
    $vmstat = "" | Select VmName, MemMax, MemAvg, MemMin, CPUMax, CPUAvg, CPUMin, CPURDYMax
    $vmstat. VmName = $vm.name
    $statcpu = get-Stat-entity ($vm) - start (get-date). AddDays(-1)-Finish (Get-Date) - MaxSamples 10000 - Intervalmins 30 - stat cpu.usage.average
    $statmem = get-Stat-entity ($vm) - start (get-date). AddDays(-1)-Finish (Get-Date) - MaxSamples 10000 - Intervalmins 30 - stat mem.usage.average
    $statcpurdy = get-Stat-entity ($vm) - start (get-date). AddDays(-1)-Finish (Get-Date) - MaxSamples 10000 - Intervalmins 30 - stat cpu.ready.summation
    $cpu = $statcpu | Measure-object-property value - average - Maximum - Minimum
    $mem = $statmem | Measure-object-property value - average - Maximum - Minimum
    $cpurdy = $statcpurdy | Measure-object-property value - average - Maximum - Minimum
    $vmstat. CPUMax = $cpu. Maximum
    $vmstat. CPUAvg = $cpu. Average
    $vmstat. CPUMin = $cpu. Minimum
    $vmstat. MemMax = $mem. Maximum
    $vmstat. MemAvg = $mem. Average
    $vmstat. MemMin = $mem. Minimum
    $vmstat. CPURDYMax = $cpurdy. Maximum
    $allvms += $vmstat
    }
    $allvms | Select VmName, MemMax, MemAvg, MemMin, CPUMax, CPUAvg, CPUMin, CPURDYMax | Export-Csv "c:\extract.csv" - noTypeInformation

    Best regards.

    OK, I hope that I finally got.

    Try this version. It indicates the maximum percentage of loan for the day.

    $allvms = @()
    $vms = Get-Vm  $start = (Get-Date).AddDays(-1)
    $metrics = "cpu.usage.average","mem.usage.average","cpu.ready.summation"
    Get-Stat -Entity $vms -Start $start -Stat $metrics |
    Group-Object -Property {$_.Entity.Name} | %{
      $cpu = $_.Group | where {$_.MetricId -eq "cpu.usage.average" -and $_.Instance -eq ""} | Measure-Object -Property value -Average -Maximum -Minimum  $mem = $_.Group | where {$_.MetricId -eq "mem.usage.average"} | Measure-Object -Property value -Average -Maximum -Minimum  $vmstat = "" | Select Time,VmName, MemMax, MemAvg, MemMin, CPUMax, CPUAvg, CPUMin, CPURDYMaxPercent  $vmstat.VmName = $_.Group[0].Entity.Name  $vmstat.Time = $_.Group | Sort-Object -Property Timestamp | Select -First 1 | Select -ExpandProperty Timestamp  $vmstat.CPUMax = $cpu.Maximum  $vmstat.CPUAvg = $cpu.Average  $vmstat.CPUMin = $cpu.Minimum  $vmstat.MemMax = $mem.Maximum  $vmstat.MemAvg = $mem.Average  $vmstat.MemMin = $mem.Minimum  $vmstat.CPURDYMaxPercent = &{
        ($_.Group | where {$_.MetricId -eq "cpu.ready.summation" -and $_.Instance -eq ""} |
        Sort-Object -Property Value -Descending |    Select -First 1 |
        Select -ExpandProperty Value)/$interval  }
      $allvms += $vmstat}
    $allvms | Select Time,VmName, MemMax, MemAvg, MemMin, CPUMax, CPUAvg, CPUMin, CPURDYMaxPercent |
    Export-Csv "c:\extract.csv" -noTypeInformation -UseCulture
    
  • The loan time CPU and reservations

    Hi all

    Is there a corellation between CPU ready time and CPU reserves? Is it normal that time of CPU ready to abandon if CPU reservations are defined? Shouldn't the time loan CPU be influenced only by the total number of vCPUs assigned to virtual machines and physical processors in the host?

    Thank you

    Dan

    Depends on how many vCPUs are in your virtual machine.  The new processors from Intel and AMD, act as NUMA systems.  Since they have the controller onboard memory, local memory is faster than remote memory.  Each processor has a memory attached to it, so the local memory for the processor is "faster" than the memory attached to another treatment on the system.  ESX will typically do a good job for you to manage, but personally, I would get as many cores as I can, more bang for your buck.  If you run vSMP large vm, then these two systems should perform similarly.

    vExpert

    VMware communities moderator

    -KjB

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