Uptime and downtime with 99.9 % SLA

2020 update: I have (finally) created a profile on LinkedIn. They seem to have a simple enough platform for writing simple (i.e. when LaTeX would be an overkill) articles, such as this one about the ultimate answer to monitoring uptime for websites, services and everything.

[ simple / flexible ]

Change SLA level: % (enter SLA level and hit the <enter> key)

SLA level of 99.9 % uptime/availability results in the following periods of allowed downtime/unavailability:

• Daily: 1m 26.4s
• Weekly: 10m 4.8s
• Monthly: 43m 49.7s
• Yearly: 8h 45m 57.0s

The SLA calculations assume a requirement of continuous uptime (i.e. 24/7 all year long) with additional approximations as described in the source.

Direct link to page with these results: uptime.is/99.9 (or uptime.is/three-nines)

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