Thanks for pointing to it, but it is so obvious: 1. "Buffer" is used as a RAM storage for index updates 2. "int" has 2 x Gb different values (2^^32) 3. We can have _up_to_ 2Gb of _Documents_ (stored as key->value pairs, inverted index)
In case of 5 fields which I have, I need 5 arrays (up to 2Gb of size for each) to store inverted pointers, so that there is no any theoretical limit: > Also, from the javadoc in IndexWriter: > > * <p> <b>NOTE</b>: because IndexWriter uses > * <code>int</code>s when managing its internal storage, > * the absolute maximum value for this setting is somewhat > * less than 2048 MB. The precise limit depends on > * various factors, such as how large your documents are, > * how many fields have norms, etc., so it's best to set > * this value comfortably under 2048.</p> Note also, I use norms etc...
