Platonides wrote:
Those links seem to not being working.
There is some tracking data; see the links from: http://meta.wikimedia.org/wiki/Wikimedia_servers#Status_and_problems
One link there works: http://ganglia.wikimedia.org/
But that was enough, at least for symptoms. I have no idea what it means. There's no corresponding admin log for 2:30 UTC....
"New Squids", a clear notch (drastic drop of CPU, load, and network traffic, almost to zero).
"Apaches", a corresponding halving of CPU, load, and output (but not input) network traffic.
"MySQL", vast increase (3-5 times) of load, doubling of CPU, but no change in network traffic (that comes a couple of hours later, probably unrelated, the admin log shows a copy of db2 to db3).
The MySQL servers that account for the change are ariel, db1, db2, db3, and db4, with a smaller bump at samuel. The others seem unaffected.