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I had deployed a Azure API Management service in Developer Pricing tier. But it is going into frequent Maintenance plan. So, I changed my pricing tier to Basic. So, How much of downtime will be there after changing the tier? And also, the basic pricing tier denoting 99.95% SLA. Is that means my service's Uptime is 99.5%?

Could anybody give clarification on this?

Srivatsava T
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    Refer the table in this document to understand the downtime according to the SLA percentage- SLA Downtime per week Downtime per month Downtime per year 99% 1.68 hours 7.2 hours 3.65 days 99.9% 10.1 minutes 43.2 minutes 8.76 hours 99.95% 5 minutes 21.6 minutes 4.38 hours 99.99% 1.01 minutes 4.32 minutes 52.56 minutes 99.999% 6 seconds 25.9 seconds 5.26 minutes > Document link - https://learn.microsoft.com/en-us/azure/architecture/framework/resiliency/business-metrics – SiddheshDesai Apr 18 '23 at 14:04
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    99.95% is the availability of the APIM for Basic tier – SiddheshDesai Apr 18 '23 at 14:05
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    Refer this document to improve the Reliability and uptime of APIm instance -https://learn.microsoft.com/en-us/azure/api-management/high-availability – SiddheshDesai Apr 18 '23 at 14:05

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That is correct but keep in mind that when your service goes to an upgrade or update the service will be working with half of its capacity so if that is not enough to serve your load to the APIM service you may experience soma availability issue.

The Basic tier can have maximum 2 units each unit has 2 Small VMs which are limited in capacity.

Mo Haidar
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