What is the bar graph?
It's a way to eyeball uptime of a particular grabber. Each vertical band is a single grab. It's "scrunched" down to ~200px wide, but the actual image may be even bigger. Right-click it and
view it alone to see the full size image. It acts as a visual log file. Color codes are as follows:
If a bar is solid yellow, it means that we got no meaningful data from that grabber for a long time! We should consider removing it from the list.
- green indicates an active (changing) successful image retrieval
- red indicates an inactive (unchanging) successful image retrieval
- yellow indicates an inability to retrieve an image. This might be no response, or a 404 page.
A grabber with mixed red and green at regular intervals means it's not uploading a new image every 10 minutes. Some slow grabbers (i.e., 2hr grabbers) do this.
2016-07-28: I updated the code to only create bars from the last week of data (1,000 grabs)