Load Types; Output Variables - MACROMEDIA COLDFUSION 5-ADVANCED ADMINISTRATION Manual

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Load types

The probed JSP page is located at
getsimpleload.jsp
uses it to calculate the overall load based on the weighting of the two available
metrics set in the
For servers that process database-intensive requests,
indication of load because ColdFusion processes the threads that calculate
ROUND_TRIP_TIME
in mind, if you have a Web server that uses many concurrent connections to a
database, either use
or include a database call in
more indicative of actual conditions.

Output variables

During processing,
that are sent in response to the probe agent's HTTP query. This section describes
these variables.
. The probe agent responds to output generated by this page and
LOADTYPE
AVG_REQ_TIME
calculates load based on the average service request time. The
AVG_REQ_TIME
load is derived by dividing the request time by the maximum acceptable request
time. This is the default metric.
ROUND_TRIP_TIME
calculates load based on the round trip time for the request.
ROUND_TRIP_TIME
This metric leaves all load calculation in the hands of the probe agent.
differently than queued database connection requests. With this
AVG_REQ_TIME
getsimpleload.jsp
CCLOADVALUE
is the load calculated by
CCLOADVALUE
available load metrics. The load value identifies how busy the server is as a
percentage of its total capacity.
CCLOADMAX
is the maximum acceptable time (in milliseconds) for a request to
CCLOADMAX
complete and marks the "busy threshold" for this server. In other words, this is
the basis upon which a load percentage is calculated given the results of the
metric. The default maximum is 8 seconds (8000 ms), but this
AVG_REQ_TIME
value is arbitrary and should be customized to fit the capacity and expectations
of a particular Web site.
is one of two variables that you would typically change in
CCLOADMAX
getsimpleload.jsp
value of , then the server can take longer for each request (on average)
CCLOADMAX
before the server is declared busy. If you decrease
average request must be shorter before the server is declared busy.
<CC_install_directory>/btauxdir/
variable:
rather than
getsimpleload.jsp
generates three significant output variables
getsimpleload.jsp
to customize your server's load metrics. If you increase the
Chapter 15 Optimizing ClusterCATS
ROUND_TRIP_TIME
as your load type,
ROUND_TRIP_TIME
to make this load type's results
using one of the
, then the server's
CCLOADMAX
is not a good