As a Web performance analyst, this is the sort of graph that melts your mind and makes you want to scream at the gods|goddesses to rain a plague of locusts on the offending System|Network|Web Site Administrators.
This is a classic display of the “run in circles, scream and shout” problem identification and resolution process.
One-half of the Opera Web servers at http://www.opera.com/ are not responding.
They have three separate public IP addresses, and it is clear that behind those IPs are many more NAT|VIP machines that respond to requests.
Did I mention that one-half of the machines at all three IP addresses are not responding to HTTP requests?
Has anyone at Opera noticed this?
Sometimes I feel like even the echoes aren’t listening anymore.