Hi, Lucene consumes a lot of file descriptors when managing index. I would like to understand the basic math in estimating fd limits. Can you please let me know if the below is basically valid assumption?
- an "average" Lucene index can break down to 40-50 segments [1] - each segment can consists of around 10 to 15 files [2] This can be up to 750 individual files per Lucene index (non-optimized). That would mean 750 fd. Now, does segment merges add any counts to needed fd as well? I mean, if let's say 10 segments are being merged, how many fd this merge process needs? Does a single merge consume more fd then what is needed for the resulting segment? Thanks, Lukas [1] http://blog.mikemccandless.com/2011/02/visualizing-lucenes-segment-merges.html [2] http://lucene.apache.org/core/4_3_0/core/org/apache/lucene/codecs/lucene42/package-summary.html#Overview
