Esxtop allows monitoring and collection of data for all system resources: CPU, memory, disk and network. When used interactively, this data can be viewed on different types of screens; one each for CPU statistics, memory statistics, network statistics and disk adapter statistics. In addition to the disk adapter statistics in earlier versions, starting with ESX3.5, disk statistics at the device and VM level are also available. Starting with ESX 4.0, esxtop has an interrupt statistics screen. In the batch mode, data can be redirected to a file for offline uses.
Many esxtop statistics are computed as rates, e.g. CPU statistics %USED. A rate is computed based on the refresh interval, the time between successive snapshots. For example, %USED = ( CPU used time at snapshot 2 - CPU used time at snapshot 1 ) / time elapsed between snapshots. The default refresh interval can be changed by the command line option "-d", or the interactive command 's'. The return key can be pressed to force a refresh.
In each screen, data is presented at different levels of aggregation. It is possible to drill down to expanded views of this data. Each screen provides different expansion options.
It is possible to select all or some fields for which data collection is done. In the case of interactive use of esxtop, the order in which the selected fields are displayed can be selected.
In the following sections, this document will describe the esxtop statistics shown by each screen and their usage.
This document was syndicated from Interpreting esx top statistics.
VMware Certified Professionals (VCPs) and performance/capacity experts.
Section 1. Introduction
Section 2. CPU
Section 2.1 Worlds and Groups
Section 2.2 Global Statistics
Section 2.3 World Statistics
Section 3. Memory
Section 3.1 Machine Memory and Guest Physical Memory
Section 3.2 Global Statistics
Section 3.3 Group Statistics
Section 4 Disk
Section 4.1 Adapter, Device, VM screens
Section 4.2 Disk Statistics
Section 4.2.1 I/O Throughput Statistics
Section 4.2.2 Latency Statistics
Section 4.2.3 Queue Statistics
Section 4.2.4 Error Statistics
Section 4.2.5 PAE Statistics
Section 4.2.6 Split Statistics
Section 4.3 Batch Mode Output
Section 5 Network
Section 5.1 Port
Section 5.2 Port Statistics
Section 6. Interrupt
Section 7. Batch Mode
Interpreting esxtop statistics
The source document Interpreting esxtop Statistics was syndicated to VIOPS because it provides very useful data:
It explains the meaning and function of each statistic such as %WAIT.
For each statistic it also provides some Q&A
The last part of the document provides help on how to interpret the batch csv output.
This information is invaluable in managing ESX and should therefore be in the VCP tool bag - which is why VIOPS has highlighted this document via syndication.