Interpreting ESXtop Statistics #vmware #esx. Introduction Section CPU Section Worlds and Groups Section PCPUs Section Global Statistics Section. VMware: Interpreting esxtop Statistics. Leave a reply Section Adapter, Device, VM screens Section I/O Throughput Statistics. The paper is titled “Interpreting esxtop Statistics“. “esxtop” is an utility provided by VMware which can be used to perform monitoring and.

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One VM has one corresponding group, so they are equivalent to per-VM statistics.

The frequency of a PCPU may be changed due to power management. CPU load accounts the run time and ready time for all the groups on the host. Table of Contents Section 1. Join Now Learn More. The “system” group contains the VMKernel system worlds.

Interpreting esxtop Statistics | VMware Communities | Infrastructure Land

Interactive command ‘d’ can be used to switch to the adapter screen, ‘u’ for the device screen, and ‘v’ for the vm screen. Why can’t we find any vmm worlds for a VM? Note that the free memory on all the nodes can be added up as the “free” memory in the PMEM line. Marco has been rewarded with the vExpert status from – We won’t discuss it further here.


This is because VMKernel needs to keep some amount of free memory for critical uses. It is displayed only when hyper-threading is used. It includes the roundtrip time between the HBA and the storage.

Gathering esxtop Statistics and doing cool stuff with it

It is likely due to hyper-threading. The client name can be used to identify the use of the port. Note that this is a per LUN maximum for the World.

See above for the internal use of this counter. ESX can make use of the HyperThreading technology, so, the performance counters takes HyperThreading into consideration as well.

Usually reservations are held for a very short time few hundred microseconds. The percentage of time spent by system services on behalf of the world. It is fine, if the difference is small. The possible system services are interrupt handlers, bottom halves, and system worlds. VMKernel then scales this number by the size of VM’s configured memory and averages it with previous samples. One way to read the batch mode output file is to load it in Windows perfmon.

All virtual disks in virtual machines are seen as virtual SCSI disks. You might want to check the QUED stats for devices, and worlds. Because sampling and averaging takes time, “TCHD” won’t be exact, but becomes more accurate over time.


If not, the time spent i. The percentage physical Interrpreting time accounted to the world. Basically, it is fine if you do not experience memory swapping or ballooning. Each queue has an associated latency, dictated by its size and whether the IO load is low or high, which affects the throughput and latency seen by applications inside VMs.

This usually means that you have memory resource contention. If free memory is inteprreting, you need to move VMs to other hosts or add statishics memory to the host. The World queue depth. This number may be different from guest working set estimate.

Creating Disk IO Excel graphics with ESXTOP

A large number of queued commands may be an indication that the storage system is overloaded. Because there are quite a number of instances related to disk statistics, let’s list a few examples below.

If this intermediate data also matches DAVG values, it is likely that the storage is under-configured for the application. This may happen even when there is plenty of free CPU cycles.