Kimahriman opened a new pull request, #46627:
URL: https://github.com/apache/spark/pull/46627
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### What changes were proposed in this pull request?
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Files don't need to be cached for reuse in `FileStreamSource` when using
`Trigger.AvailableNow` because all files are already cached for the lifetime of
the query in `allFilesForTriggerAvailableNow`.
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As reported in https://issues.apache.org/jira/browse/SPARK-44924 (with a PR
to address https://github.com/apache/spark/pull/45362), the hard coded cap of
10k files being cached can cause problems when using a maxFilesPerTrigger >
10k. It causes every other batch to be 10k files, which can greatly limit the
throughput of a new streaming trying to catch up.
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Every other streaming batch won't be 10k files if using Trigger.AvailableNow
and maxFilesPerTrigger greater than 10k.
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New UT
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No
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