3.5.1 Matrix Server Administration Guide

Chapter 16: Performance Monitoring 267

The arguments are:

• --servers

ALL_SERVERS | <server_name_or_IP>

The server to be monitored. The default is all servers.

• --datasets <number of data sets> |

UNLIMITED

The number of datasets to be returned. The default is one. After the

specified number of data sets are returned, the Dashboard will

terminate.

•--noHeaders

Do not output column headers.

• --csv

Generate the report in a comma-separated format.

Performance Counters

The following information may be useful when interpreting the values

reported by the performance counters.

Average CPU utilization (%). This counter reports the time the CPU

spent doing work, either processing a hardware or software interrupt or

executing a kernel or user process. All other time is “idle” and is spent

either doing things that improve system performance (such as zeroing

out memory buffers) or doing nothing at all.

Average committed physical memory utilization (%). This counter

reports the total “committed” memory used in the system. The total

in-use memory is typically much higher. For this counter, “committed”

means that the kernel cannot easily free up this memory in order to give it

to another process. Either the memory is not freeable at all (it is fixed in

physical memory), or it can be freed only after being swapped out. In-use

memory, which is not reported, is almost always near 100% because the

kernel attempts to always use memory, but in ways that improve system

performance and can easily be reclaimed, such as a disk buffer cache. For

this counter, lower numbers are better because they indicate that the

kernel is under less pressure to balance memory resources.