On Sun, 27 Mar 2011 06:33:18 -0400, January Sharp wrote:
Hi,
We installed Squid 3.1.10 three days ago, and lots of clients are
using it. Being a complete newbie to this, may I ask a question.
What is best statistic to use to find out the general, overall
improvement of our clients' web surfing with vs. without squid. That
is, when I report to my management, "Our users are able to surf X%
faster since we installed squid".
Is this X available or computable from the information in the General
Runtime Information page of the Cache Mgr? Or somewhere else in Cache
Mgr?
I am guessing it is 1 - (Cache Misses Median Service Times / HTTP
Requests (All) Median Service Times). Is this correct?
Any of the metrics which provide both HIT and MISS details can be used
as performance gain measures.
Speed improvements are complex. For absolute statements like that you
will have to combine the HIT service time with a non-proxied service
time. Mediated in some calculation against the request HIT ratio.
The results are rarely what you expect. Adding a non-caching proxy
usually results in speed LOSS from the overheads, but not always.
The other metric used are Byte Hit ratios/totals. Combined with your
upstream bandwidth costs that measures a direct $$ figure in the budget.
Amos
