Proxy Cache Array Monitoring

The Proxy Cache Array Monitoring page presents status of and statistics for the proxy cache service provided by the array.

To Load the Proxy Cache Array Monitoring Page

1. In the Proxy Cache Administration page, click Proxy Cache Monitoring.

   A page such as that shown in Figure 15-3 is displayed.

   Figure 15-3 Proxy Cache Array Monitoring Page

   
   

When you load the Proxy Cache Array Monitoring page, a snapshot of current array activity is displayed. If you want periodic updates, specify a number of minutes in the "Refresh" field at the bottom of the page. Click Reset (next to OK) to return the refresh value to 0.

Click Reset Counter to return the URLs/sec and Hits/sec numbers in the Delta column, to zero.

The Proxy Cache Array Statistics table has a row for each host in the array. If a host is down, the row for that host flashes and displays in red. In the flashing row is displayed the cause of the host being absent from the array or a message "status unknown."

The Proxy Cache Array Monitoring page has a single table, Proxy Cache Array Statistics. The fields in this table are as follows:

Host Name

The host name associated with the array member and, also, associated with the host address (see next item). The Host Name entry is a link to a Proxy Cache Monitoring for Host page, described below.

In the current release, for a host name link to work, the host name must be resolveable by the name service(s) configured on the server.

Host Addr

The IP address of the array member. That is, the address associated with the host name.

State

The state of the service address associated with the proxy cache service on a host.

Load and Capacity

Divide the load by the capacity to arrive at a percentage that indicates the resources consumed on a host.

Under the Totals (since start) heading:

# URLs accessed

The number of requests for URLs fielded by the Netra Proxy Cache server.

# Hits

The number of URL requests for which the Netra Proxy Cache server was able to return an object from its own cache or the cache of another array member.

% Hits

The number of hits divided by the number of URLs accessed. This number tells you the extent to which the Netra Proxy Cache server is able to respond to URL requests from local caches.

Under the Delta (since reset counter) heading:

URLs/sec

The rate at which URL requests are being fielded by the Netra Proxy Cache Server, since the reset counter was last set to zero.

Hits/sec

The rate at which the Netra Proxy Cache Server was able to find requested objects in a local cache, since the reset counter was last set to zero.

% Hits

The number of hits divided by the number of URLs accessed, since the reset counter was last set to zero.

The row Totals for all Array Members gives the same types of statistics as described above, for all array members. This row gives you a picture of the proxy cache performance of the entire array.