Before you can investigate server latency, you need to have created an Analytics
profile that is logging statistics internally on the BIG-IP®
system. In the profile, the statistics gathering configuration must have
Server Latency selected as one of the collected metrics. The
Analytics profile must be associated with one or more virtual servers, or an iApps™
application service. To view Analytics statistics properly, Adobe Flash Player must be
installed on the computer where you plan to view them.
You can review statistics concerning server latency on the Analytics charts.
Server latency is how long it takes (in milliseconds ) from the time a
request reaches the BIG-IP system, for it to proceed to the web application server, and
return a response to the BIG-IP system.
On the Main tab, click
The Analytics Overview screen opens.
From the Latency menu, click Server Latency.
A chart shows the server latency for all applications and virtual servers associated with all Analytics profiles.
To view server latency for a specific application, in the Details table, select
only that application.
The charts show latency only for the selected application.
To view server latency for a specific virtual server:
In the View By list, select
The charts show latency for all virtual servers.
In the Details list near the charts, click the virtual server you are
The charts show latency only for the selected virtual server.
If further investigation is needed, in the View By
setting, select other entities to view charts that show latency for other
collected entities included in the Analytics profile, for example, specific pool
members, URLs, countries, or client IP addresses.
Tip: If you are concerned about server latency, you can configure the
Analytics profile so that it sends an alert when the average server latency exceeds
a number of milliseconds for some period of time.