Github user ericl commented on a diff in the pull request:
https://github.com/apache/spark/pull/16135#discussion_r91828375
--- Diff:
core/src/main/scala/org/apache/spark/metrics/source/StaticSources.scala ---
@@ -97,6 +97,12 @@ object HiveCatalogMetrics extends Source {
MetricRegistry.name("parallelListingJobCount"))
/**
+ * Tracks the total number of cachedDataSourceTables hits.
+ */
+ val METRIC_DATASOUCE_TABLE_CACHE_HITS = metricRegistry.counter(
+ MetricRegistry.name("dataSourceTableCacheHits"))
--- End diff --
Could we use one of the other metrics, rather than add a new one?
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