Specifications

Plotting Site Performance History
Equalizer Installation and Administration Guide 113
• Site Returned shows the number of clients directed to this site. You can compare this number
with the values for other sites to determine the relative number of users sent to each site. If a
value for one site is zero and the others are non-zero, consider why the zero site has no traffic.
• Returned as Default indicates the number of clients directed to the default site.
• Average Ping Time shows the average triangulation time for all clients successfully
contacted from this site. This represents all of the triangulation probes—whether or not this
site was selected to process the request. This value gives you an idea of the network latency
from this site to the user population. You can compare this value with the same value for other
sites.
Plotting Site Performance History
If you have installed Envoy, the Plot Site feature enables you to view a graphical representation of
the performance history for the selected site. To plot the performance history for a site, follow these
steps:
1. Log into the Equalizer Administration Interface in either view or edit mode.
2. In the left frame, click the name of the site whose history you want to view. The Site
Parameters appear in the right frame.
3. Select Plot Site History from the local menu in the Site Parameters frame. The graphical
history for the selected site appears in the right frame.
By default, Equalizer plots the Request Rate and Resource Down values for the previous 30
minutes. To change the information plotted, select the categories and duration to be plotted; then
click the Plot button. (To zoom in on a portion of the graph, click the area in which you are
interested.)
You can plot the following six values for a site:
• Probes Missed is the number of requests in which an agent failed to reply to Equalizer’s
probes.
• Triangulation Errors shows the number of ICMP ECHO requests that the agent at this site
sent to clients and for which the agent received no response.
• Resource Down indicates that the target resource failed to respond during the period plotted.
• Site Chosen shows the number of times that Equalizer returned this site in response to a client
query.
• Network Latency shows the average network distance, in milliseconds, between the agent at
this site and the clients that made DNS requests.
• Resource Load is the relative workload of this site during the plotted period.
Configuring Plot Logs
A global parameter, log hours, controls the size and number of plot logs that Equalizer uses to
collect the data for plotting performance graphs. This parameter is set in the modifying system
parameters screen, displayed by selecting Equalizer > Global Configuration from the main menu
of the Equalizer Administrative Interface.