Installing and Configuring HP WebQoS Peak on Linux

Chapter 2 13
HP WebQoS Peak on Linux
What is HP WebQoS Peak on Linux?
When Does a Web Server Become Overloaded?
A web server becomes overloaded when there are too many requests for
the server to fulfill; the server runs out of resources. Requests may be
delayed or dropped. For example, a user involved in a long session may
experience poor performance or may have to reload a page more than
once for it to display.
How Does WebQoS Peak on Linux Work?
HP WebQoS Peak monitors the resources and the number of arriving
sessions on the web server. (Refer to the figure on the next page). Based
on available resources and how WebQoS is configured, it accepts, defers,
rejects or redirects a session, making sure the web server does not
become overloaded. It also allows an admitted session to be completed.
When the web server’s resources are available, WebQoS allows the
session to begin and fulfills all requests made during this session. It
monitors the time between requests as well as the length of the session.
If one of these variables exceeds the thresholds configured in WebQoS,
the session is terminated. Otherwise, all requests are fulfilled until the
session is completed.
When the web server’s resources are not available, WebQoS defers,
rejects, or redirects the session. The web administrator can choose to