The Charts sub-tab allows you to
view a trend in performance for a host. Use the
Host selector to select the host of interest
and the Chart selector to
select the performance metrics to trend. You can also
select specific time interval (Chapter 10, Selecting a time period ) over which
to trend the data.
5.2.1. Physical host charts
If you select a physical host, the following charts are
available:
- CPU Utilization
-
The CPU utilization for each of the following
categories: user, nice, system, IO wait, IRQ,
Soft IRQ.
- CPU load
-
1 minute, 5 minute, and 15 minute load averages.
- Processes
-
Number of CPUs and number of processes running.
- Interrupts
-
Number of interrupts/s and number of context
switches/s.
- Memory usage
-
Memory usage for each of the following categories:
used, shared, buffers, cache, free.
- Memory paging
-
Pages/s in and out.
- Memory swapping
-
Pages/s swapped in and out.
- Disk IO
-
Bytes/s read and written.
- Disk usage
-
Disk space used and free.
- Network bytes
-
Bytes/s received and sent over the network
interfaces.
- Network packets
-
Packet/s received and sent for each of the
following categories: packets, drops, errors.
5.2.2. Virtual host charts
If you select a virtual machine, the following charts are
available:
- vCPU utilization
-
% time that the CPU is busy.
- vMemory usage
-
Memory used and free.
- vDisk IO
-
Bytes/s read and written.
- vDisk usage
-
Disk space allocated and available.
- Network bytes
-
Bytes/s received and sent over the network
interfaces.
- Network packets
-
Packet/s received and sent for each of the
following categories: packets, drops, errors.
5.2.3. Using the legend to select one counter
Sometimes one performance counter value can be much
smaller than the other performance counters, making it
hard to see the the smaller counter value trend.
In this case, you can remove counter trends from the chart
by clicking on the corresponding legend items.
For example, when viewing the
CPU Utilization chart, clicking with
the left
mouse button on User CPU % in the legend
will change the chart so that the User CPU % trend is removed
and the chart is rescaled making the other trend lines more
visible. You can remove all but one of the trend lines. You can
redisplay a trend line by clicking on the corresponding
legend item again.