WorkerStats.collect_time_in_ms
Epoch unix time of collection of metrics.
WorkerStats.last_action_start_time_in_ms
Epoch unix time of last action started on specific worker.
WorkerStats.prior_worker_memory_in_kb
Memory usage of the worker process prior to the invocation.
WorkerStats.worker_memory_in_kb
Memory usage of worker process at the end of the build.