User manual

Cache statistics
Cobalt CacheRaQ 4 User Manual 45
Cache statistics
The CacheRaQ 4’s caching software records information on all HTTP requests it
receives. Statistics are calculated nightly from this data and are available on a
daily basis for the current month and the preceding month.
To use the Cache Statistics page, you first set the parameters for the statistics you
want to view and then you generate the statistics.
• Select the type of statistics you want to display: summary statistics, all
clients, a specific client, all servers or a specific server. For more information
on the last four options, see “Usage statistics” on page 47.
You can also choose to have all servers from the same domain listed as one
server. For example, www10.cobalt.com, www42.cobalt.com, and
www53.cobalt.com would all be listed under the single entry cobalt.com. To
enable this option, click the check box Combine server names into single
domain.
• Sort the result by bytes or by requests.
• Indicate the number of results to return.
• Specify a time period for which you want to see the statistics. You can select
an arbitrary combination of days from the last two months for which you
want to see statistics. You can also enter a time value (in minutes, seconds or
hours) to have statistics calculated for the immediate past for the amount of
time you have specified (up to the start of the current day).
There are two main types of statistics available: summary statistics and usage
statistics.
Summary Statistics
This option displays the following information for the time period you specify:
• Number of clients. This is the number of unique client IP addresses that
made requests through the CacheRaQ 4.
• Number of cache hits. A cache hit is a request in which the requested
document was delivered from the cache — the document did not have to be
retrieved from the original server.
• Number of cache misses. A cache miss is a request in which the requested
document was not in the cache and had to be retrieved from the original
server.
• Total number of documents sent to clients
• Number of bytes sent to clients from cache hits