[GitHub] [spark] kiszk commented on a change in pull request #24577: [Spark-27664][CORE] file status cache perf issue/branch 2.4

[GitBox <gi...@apache.org>]

kiszk commented on a change in pull request #24577: [Spark-27664][CORE] file status cache perf issue/branch 2.4
URL: https://github.com/apache/spark/pull/24577#discussion_r283142463
 
 

 ##########
 File path: sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
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 @@ -542,6 +542,17 @@ 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:
   `single entry"` -> `single entry "`

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