Google doesn’t guarantee 100% up-time even if you use 2 instances or more, instead we do have an SLA agreement with the customers where we provide a monthly up-time percentage of a range between 99.00% – < 99.95% as mentioned in this <https://cloud.google.com/appengine/sla> document.
That being said, it is recommended to use automatic scaling <https://cloud.google.com/appengine/docs/flexible/nodejs/configuring-your-app-with-app-yaml#automatic_scaling> to ensure that your application is always serving with enough instances to meet your traffic needs. If you are using manual scaling, it is recommended to at least have two instances in case of automatic updates <https://cloud.google.com/appengine/docs/flexible/java/how-instances-are-managed#restarts>, and to follow the ‘Best Practices’ guide <https://cloud.google.com/appengine/docs/flexible/java/how-instances-are-managed#instance_uptime> to avoid instance downtime. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/5f9fee5f-6db0-4738-8511-3e91619bc6e3%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
