LucaCanali opened a new pull request #24132: [SPARK-27189][CORE] Add executor-level memory usage metrics to the metrics system URL: https://github.com/apache/spark/pull/24132 ## What changes were proposed in this pull request? This PR proposes to add instrumentation of memory usage via the Spark Dropwizard/Codahale metrics system. Memory usage metrics are available via the Executor metrics, recently implemented as detailed in https://issues.apache.org/jira/browse/SPARK-23206. Additional note: [SPARK-26357] has some overlap with the changes proposed in this PR. Making metrics usage metrics available via the Spark Dropwzard metrics system allow to improve Spark performance/workload dashboards and study memory usage, as in the example graph https://issues.apache.org/jira/secure/attachment/12962810/Example_dashboard_Spark_Memory_Metrics.PNG ## How was this patch tested? Tested on YARN cluster and with an existing setup for a Spark dashboard based on InfluxDB and Grafana.
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