jerrypeng commented on code in PR #38430: URL: https://github.com/apache/spark/pull/38430#discussion_r1011239497
########## sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/HDFSMetadataLog.scala: ########## @@ -64,6 +67,17 @@ class HDFSMetadataLog[T <: AnyRef : ClassTag](sparkSession: SparkSession, path: fileManager.mkdirs(metadataPath) } + protected val metadataCacheEnabled: Boolean + = sparkSession.sessionState.conf.getConf(SQLConf.STREAMING_METADATA_CACHE_ENABLED) + + /** + * Cache the latest two batches. [[StreamExecution]] usually just accesses the latest two batches + * when committing offsets, this cache will save some file system operations. + */ + protected[sql] val batchCache = Collections.synchronizedMap(new LinkedHashMap[Long, T](2) { Review Comment: We could but the change is not really going to yield much difference. The memory foot print of this is minimal. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org