--- prelude: > This release features switch to Oslo Futurist library for asynchronous thread execution and periodic tasks. Main benefit is that periodic tasks are now executed truly in parallel, and not sequentially in one green thread. upgrade: - Configuration option "workers_pool_size" can no longer be less or equal to 2. Please set it to greater value (the default is 100) before update. deprecations: - Configuration option "periodic_interval" is deprecated. - Using "driver_periodic_task" decorator is deprecated. Please update your out-of-tree drivers to use "periodics.periodic" decorator from Futurist library. fixes: - Periodic tasks are no longer executed all in one thread.