Shrink worker pool if memory pressure too high. `WorkerLifecycleManager` catches workers in idle state too rarely, therefore I implemented strategy to shrink worker pools if the memory pressure is high even after evicting of idle workers. This strategy sets workers as `doomed` and on the next return to worker pool invalidates them and shrinks worker pool. To enable this strategy set flag `experimental_shrink_worker_pool`. This strategy is tested and could decrease worker memory usage twice without almost any wall time degradation. PiperOrigin-RevId: 522302353 Change-Id: I0c1d09cb3d70c711862dc87ca486bd5c978f0813
{Fast, Correct} - Choose two
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