When the index has more than 1 segment, norms take 2 bytes of RAM per norm not 1
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Key: LUCENE-1023
URL: https://issues.apache.org/jira/browse/LUCENE-1023
Project: Lucene - Java
Issue Type: Bug
Components: Index
Affects Versions: 2.2, 2.1, 2.0.0, 1.9, 2.0.1, 2.3
Reporter: Michael McCandless
Assignee: Michael McCandless
Priority: Minor
When norms are loaded for an index with multiple segments,
MultiSegmentReader caches a byte array for all norms (concatenated
from all segments), and SegmentReader also caches a byte array for its
norms. I think MultiSegmentReader should somehow tell SegmentReader
not cache its own norms. For a large index this will save quite a bit
of memory (1 byte per document per field-with-norms).
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