Cache docsets and docs at the SegmentReader level
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Key: SOLR-1308
URL: https://issues.apache.org/jira/browse/SOLR-1308
Project: Solr
Issue Type: Improvement
Affects Versions: 1.4
Reporter: Jason Rutherglen
Priority: Minor
Fix For: 1.5
Solr caches docsets and documents at the top level Multi*Reader
level. After a commit, the caches are flushed. Reloading the
caches in near realtime (i.e. commits every 1s - 2min)
unnecessarily consumes IO resources, especially for largish
indexes.
We can cache docsets and documents at the SegmentReader level.
The cache settings in SolrConfig can be applied to the
individual SR caches.
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