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Performance Metrics - 2009

Percentage of time that a request for a page is returned within three seconds from on campus (target: 99.9%)

Month %
Jan '09* 98.8%
Feb '09 99.81%
Mar '09 100%
Apr '09 99.96%
May '09 99.98%
Jun '09 99.92%
Jul '09 99.92%
Aug '09 99.87%
Sep '09 99.82%
Oct '09** 99.49%
Nov '09 99.73%
Dec '09 99.91%

* This drop was caused by a combination of a network failure, which caused a small percentage of requests to take ~3.5 seconds, over a period of about 3 weeks, and a 4-hour outage of web-sign-on.

** This drop was caused by an extended period of downtime (1am-5am) caused in turn by a failure to recover from a brief network outage. The cause of this failure has now been identified and corrected

Availability off-campus, as measured by Pingdom.com (30 second timeout, from at least 2 out of 10 locations ) (no target set)

Month %
Jan '09 99.71%
Feb '09 99.93%
Mar '09 99.87%
Apr '09 99.95%
May '09 99.90%
Jun '09 99.93%
Jul '09 100%
Aug '09 99.98
Sept '09 100%
Oct '09 99.75%
Nov '09 99.93%
Dec '09 99.98%

Percentage of time that a request for a websignon UserLookup request is returned within 5 seconds from within our datacenter* (target: 99.5%)

Month %
Jan '09 99.51%
Feb '09 99.99%
Mar '09 100%
Apr '09 100%
May '09 99.98%
Jun '09 100%
Jul '09 99.88%
Aug '09 100%
Sep '09 99.95%
Oct '09 99.98%
Nov '09 100%
Dec '09 100%

* This might seem contrived. But 5 seconds is the threshold at which other applications will time-out a request to websignon, and since the vast majority of WSOS-enabled apps live in our datacentres, that's where we should measure from.