Brocade Web Tools Administrator's Guide v6.1.0 (53-1000606-02, June 2008)

Web Tools Administrator’s Guide 25

53-1000606-02

Refresh rates

Different panels of Web Tools refresh at different rates.

The refresh, or polling, rates listed in this section and throughout the book indicate the time

between the end of one polling and the start of the next, and not how often the screen is refreshed.

A refresh rate of 15 seconds does not ensure that a refresh occurs every 15 seconds. It ensures

that the time between each refresh activity is no more than 15 seconds.

Autorefresh intervals might be not be exactly 15 seconds. The refresh rate varies depending on the

activity in the fabric and on the host system you are using. Following are some variables you should

consider when refreshing the fabric:

• Retrieval time increases when you are in a large fabric as there is more data to fetch from the

switch(s).

• Processor speed of the system you are using may slow down the refresh rate.

• OS-Job Scheduling if you are using a host-system in the data center impacts the refresh rate.

• JVM-Performance can contribute to causing interval differences between what is on-screen

and how long it is actually taking.

For these reasons, the time displayed in the port statistics tab might not be refreshed as expected.

The counter time indicates only that “this statistics data is retrieved from the switch in this time.”

To ensure the correct information, the time field is updated along with the port statistics data after

every refresh.

The refresh rates are different for each module. Table 3 lists polling rates by module. Though these

rates are sample rates, they correctly illustrate variance in the refresh rates throughout Web Tools.

TABLE 3 Polling rates

Module Polling Rate

Name Server User-defined; 15 sec minimum

Zoning Database 60 sec

Fabric Watch 15 sec

Performance Monitor 30 sec

Port Management 60 sec

FC Routing 30–90 sec, depending on network traffic