NRTCachingDirectory class information

[ba...@oracle.com]

Hi,-

  Related to my previous thread: Warming up index files via cat to make 
it in memory index


I found out about this class in the Book Lucene 4 Cookbook by Edwood Ng.


May i please ask about any pointers, best practices paper or any Lucene 
documentation for

comparing this NRTCachingDirectory class for performance?

https://lucene.apache.org/core/8_5_2/core/org/apache/lucene/store/NRTCachingDirectory.html


In the docs link above, there is a statement like this:

This will cache all newly flushed segments, all merges whose expected 
segment size is <= 5 MB, unless the net cached bytes exceeds 60 MB at 
which point all writes will not be cached (until the net bytes falls 
below 60 MB).


Is there also a Lucene doc where the indexing is described during query 
(search) process?

Best regards


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