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LAN I/O Error Rate
•
Before the installation of a new software
This measurement shows the percentage of
application, you can install it in several trial
network packets sent and received that
PCs and monitor the PCs’ page swapping
contained errors.
rates to determine if more physical memory
is needed to successfully run that
This is useful for spotting network errors and
application.
for isolating problem areas. For example, a very
high error rate between a specific PC and a hub
•
If a PC user complains about a slow PC or
could point to a faulty network cable between
disruptive system errors, you can monitor
these two devices.
resources (such as memory and network
usage) on that remote PC to help track down
This measurement is available for PCs running
and resolve the problem.
either Windows NT or Windows 200 which have
the Microsoft SNMP Service installed. However,
in some cases, for Windows PCs without
Overhead Used by Resource
Microsoft SNMP, the Toptools Device Manager
Monitoring
may be able to calculate an approximate value
using the LAN card’s DMI instrumentation.
Since resource monitoring is done by the
remote PCs themselves, no network bandwidth
LAN Bandwidth Utilization
is used for this task. Furthermore, less than 1%
This measurement shows the percentage of the
of the processor time is used on the remote
LAN card’s transfer capacity that is actually
PCs.
being used.
Alert thresholds are also stored and managed
This information can help to optimize a network
by each remote PC. If alerts are generated, a
configuration, or can indicate network
small amount of network bandwidth is used to
undercapacity. If network bandwidth utilization
send the alert to the Device Manager.
is nearing saturation, this is a useful warning
If you are using the Device Manager to display a
that network facilities must be upgraded or
remote PC’s resource monitoring, requests are
reconfigured to provided more capacity in the
sent between these two devices on the network
areas where it is needed.
to keep the display up to date. However, even
The calculation of LAN bandwidth use is
this task requires very little network bandwidth.
available for PCs running either Windows NT or
There are two cases in which no monitoring is
Windows 2000 and with the Microsoft SNMP
done by the remote PCs, and therefore zero
Service installed. In some cases, for Windows
system capacity is used. Firstly, if resource
PCs without Microsoft SNMP, the Toptools
monitoring is disabled, and secondly, if the
Device Manager may be able to calculate an
remote PC goes into standby or sleep mode.
approximate value using the LAN card’s DMI
Toptools allows the PC to go into standby or
instrumentation.
sleep mode, rather than waking it up to
continue monitoring its resources. If the remote
Typical Uses of Resource Monitoring
PC goes into standby or sleep mode, it implies
that the PC is not currently being used and
•
You can set alerts to permanently monitor
there is no need to monitor resources.
the hard disk drive space on all systems. In
this way, you can ensure that there is
sufficient disk space on all devices for future
growth. A critical alert on a single PC may
prompt you to tell the user that they must
remove all unneeded files from their system.
Alerts are also useful for receiving early
warning of undercapacity, enabling you to
plan for major disk upgrades.
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