Simon Willnauer created LUCENE-9539:
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Summary: Improve memory footprint of SortingCodecReader
Key: LUCENE-9539
URL: https://issues.apache.org/jira/browse/LUCENE-9539
Project: Lucene - Core
Issue Type: Improvement
Reporter: Simon Willnauer
SortingCodecReader is a very memory heavy since it needs to re-sort and load
large parts of the index into memory. We can try to make it more efficient by
using more compact internal data-structures, remove the caches it uses provided
we define it's usage as a merge only reader wrapper. Ultimately we need to find
a way to allow the reader or some other structure to minimize its heap memory.
One way is to slice existing readers and merge them in multiple steps. There
will be multiple steps towards a more useable version of this class.
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