kaihe created LUCENE-9297:
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Summary: Index has about 600+ columns，average size of doc is
relatively big, Lucene firstly obtain the original doc from disk and then merge
the old and the updating coulmns to a new one,finally flush to disk.The dsik io
usage rate of our 150+ nodes always reach
Key: LUCENE-9297
URL: https://issues.apache.org/jira/browse/LUCENE-9297
Project: Lucene - Core
Issue Type: New Feature
Reporter: kaihe
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