Hello Ting, It is not possible to configure any time for weekly restarts in the Flexible Environment. These are no scheduled or predictable events. The environment does not perform maintenance on all your running instances at once, so there are always running instances left to serve traffic. If you have multiple instances, you can be sure that at least one of them, usually more, will remain active during maintenance on others. Overall, you should not fear maintenance-related restarts.
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