Tornado

6
Browser
6.11 Browser Displays and Target Link Speed
If your communications link to the target is slow (a serial line, for example), use
the browser judiciously. The traffic back and forth to the target grows with the
number of objects displayed, and with the update frequency. This traffic may
seriously slow down overall Tornado performance, on slow links. If you
experience this problem, try displaying fewer objects, updating browser displays
on request instead of periodically, or setting updates to a longer interval.
6
6.12 Troubleshooting with the Browser
Many problem conditions in target applications become much clearer with the
browser’s visual feedback on the state of tasks and critical objects in the target. The
examples in this section illustrate some of the possibilities.
6.12.1 Memory Leaks
The browser makes memory leaks easy to notice, through the memoryconsumption
bar graphs in the main browser window: if the allocated portion of
memory grows continually, you have a problem. The memory-consumption graph
in Figure 6-21 corresponds to a memory leak in an application that has run long
enough to almost completely run out of memory.
Figure 6-21
A Memory Leak as Seen in the Browser
227