Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/17591#discussion_r110639538
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileStatusCache.scala
---
@@ -94,13 +94,25 @@ private class SharedInMemoryCache(maxSizeInBytes: Long)
extends Logging {
// Opaque object that uniquely identifies a shared cache user
private type ClientId = Object
+ /* [[Weigher]].weigh returns Int so we could only cache objects < 2GB
+ * instead, the weight is divided by this factor (which is smaller
+ * than the size of one [[FileStatus]]).
+ * so it will support objects up to 64GB in size.
+ */
+ private val weightScale = 32
--- End diff --
Rather than make it a member variable, just a local variable in the
initializer for cache?
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