HP Cache Server Appliance Administrator Guide

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This appendix describes the statistics on the following Traffic Manager Monitor pages:
• The Dashboard page‚ on page 120
• The Node page‚ on page 121
• The Graphs page‚ on page 121
• The Protocols page‚ on page 122
• The Cache page‚ on page 125
• The Other page‚ on page 126
• The MRTG page‚ on page 127
The Dashboard page
The following table describes the statistics on the Dashboard.
A Traffic Manager Statistics
Statistic/Field Description
Node Name The name of the Traffic Server node. If the node is in a cluster, the names of
all the nodes in the cluster are displayed.
On/Off The green On light Indicates that the traffic_server process is running (caching
and proxying services are running).
The green Off light indicates that the traffic_server process is not running.
Alarms The green OK light indicates that no alarms are currently present on the node.
The red light with an exclamation point indicates that alarms are present on
the node.
The yellow light with exclamation point indicates that there is a cluster
problem.
Objects Served The total number of objects served by the node.
Transactions per second The number of transactions per second processed by the node.
More Detail
Cache Hit Rate The percentage of HTTP requests served from the cache, averaged over the
past 10 seconds. This value is refreshed every 10 seconds.
Cache Hit Rate, Fresh The percentage of HTTP requests for fresh objects in the cache, averaged over
the past 10 seconds.
Cache Hit Rate, Refresh The percentage of HTTP requests for expired objects that are revalidated, turn
out to be still fresh, and served to clients; averaged over the past 10 seconds.
Errors The percentage of HTTP requests that end in early hangups.
Aborts The percentage of aborted HTTP requests.
Active Clients/servers The current number of open HTTP client connections/open HTTP server
connections.
Average Fresh Hit The amount of time it takes Traffic Server to serve an HTTP request for an
object that is fresh in the cache, averaged over 10 seconds.
Average Cached Miss The amount of time it takes Traffic Server to serve an HTTP request for an
object that is not in the cache, averaged over 10 seconds.
Client Throughput The HTTP throughput, in MB per second.