rezasafi edited a comment on issue #24132: [SPARK-27189][CORE] Add executor-level memory usage metrics to the metrics system URL: https://github.com/apache/spark/pull/24132#issuecomment-477341237 The only reasons that in https://github.com/apache/spark/pull/23306, I went for the complex approach were: - We didn't want to reintroduce again existing metrics. So the only focus was on Procfs metrics - We didn't want to rely on heartbeat while Metrics system has its own puling period setting etc. I think #23306 is better, because of the caching. It may alleviate the problem of unified sampling, because we won't compute the metrics at defined intervals. It won't totally resolve the issue though. I think to actually resolve that some more sophisticated solutions is needed.
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