| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Request_rate |
Rate of requests
to the ColdFusion server |
Reqs/Sec
|
A high request
rate is an indicator of server overload. By comparing the request
rates across application servers, an operator can gauge the
effectiveness of load balancers (if any) that are in use |
| DB_access_rate |
Rate of database
accesses issued by applications executing on the ColdFusion server |
Reqs/Sec
|
An unusually low
or high rate of database accesses from one or more applications hosted
on the ColdFusion application server may provide hints on anomalies
with the applications |
| Data_xmit_rate |
KBytes/sec
transferred by the application server in response to incoming requests |
KB/Sec
|
A sudden change
in data transmit rate can be indicative of a change in the
characteristics of key applications hosted on the engine |
| Data_recvd_rate |
KBytes/sec
received by the application server |
KB/Sec
|
A sudden increase
or decrease in data rate to the application server is indicative of
either an increase or decrease in popularity of applications hosted on
the ColdFusion application server |
| Requests_queued |
Number of
requests queued waiting for service from the ColdFusion application
server. |
Number
|
An increase in
requests queued can indicate a bottleneck at the application server.
The problem may be caused either because of an application server
problem, a problem with specific applications hosted on the ColdFusion
server, or because of backend problems (e.g., with the database
server, payment gateway, etc.). |
| Requests_running |
Number of
requests currently being processed by the application server. |
Number
|
An increase in
requests running may indicate an increase in user workload (to be
sure, correlate this value with the data transmit and receive rates).
Alternatively, a slowdown at the application server may also cause the
requests that are simultaneously executing to increase. |
| Requests_timeout_rate |
Rate at which
requests are timing out while waiting for service from the ColdFusion
server. |
Reqs/Sec
|
An increase in
the time out rate of requests is a clear indication of a problem with
one or more applications executing on a ColdFusion server. Requests
may time out because of an application problem, because of failure to
access external servers (e.g., databases, payment gateways), or
because of server overload. By
determining whether all of the web transactions that use the
ColdFusion server are experiencing problems, an operator can determine
if the problem is related to the application server or with specific
applications. |
| Avg_queue_time |
Average time in
seconds spent by a request waiting for service by the ColdFusion
server. |
Secs
|
An increase in
queuing delay reflects a server bottleneck. |
| Avg_response_time |
Average time (in
seconds) for processing a request at the server. |
Secs
|
An increase in
response time can occur because there are too many simultaneous
requests or because of a bottleneck with any of the applications
executing on the server. |
| Avg_DB_time |
Average time (in
seconds) for database accesses from applications executing on the
ColdFusion server. |
Secs
|
A large value of
DB access time can be caused by poor query construction, bottlenecks
at the database server(s), etc. |