gatorsmile commented on a change in pull request #24585: [Spark-27664][CORE]
Performance issue while listing large number of files on an object store.
URL: https://github.com/apache/spark/pull/24585#discussion_r283115595
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
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@@ -585,6 +585,17 @@ object SQLConf {
.longConf
.createWithDefault(250 * 1024 * 1024)
+ val HIVE_FILESOURCE_FILE_CACHE_CONCURRENCY_LEVEL =
+ buildConf("spark.sql.hive.filesourceFileCacheConcurrencyLevel")
+ .doc("Provide concurrency level for underlying guava cache. The default
is 1." +
+ " Higher value may give better performance, when the number of " +
+ "entries in the cache is very large. This imposes a limit on the size
of single entry" +
Review comment:
Have you measured the perf overhead?
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