spark-sql-streaming-StateStoreMetrics.adoc

StateStoreMetrics

StateStoreMetrics holds the metrics of a state store:

• Total number of keys

• Memory used (in bytes)

• StateStoreCustomMetrics with their current values (Map[StateStoreCustomMetric, Long])

StateStoreMetrics is used (and created) when:

• StateStore is requested for the metrics

• StateStoreHandler is requested for the metrics

• SymmetricHashJoinStateManager is requested for the metrics