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From Walter Underwood <>
Subject Re: index size before and after commit
Date Thu, 01 Oct 2009 14:08:32 GMT
Here is how you need 3X. First, index everything and optimize. Then  
delete everything and reindex without any merges.

You have one full-size index containing only deleted docs, one full- 
size index containing reindexed docs, and need that much space for a  
third index.

Honestly, disk is cheap, and there is no way to make Lucene work  
reliably with less disk. 1TB is a few hundred dollars. You have a free  
search engine, buy some disk.


On Oct 1, 2009, at 6:25 AM, Grant Ingersoll wrote:

>> 151GB or as little as from 183GB to 182GB.  Is that size after a  
>> commit close to the size the index would be after an optimize?  For  
>> that matter, are there cases where optimization can take more than  
>> 2x?  I've heard of cases but have not observed them in my system.
> I seem to recall a case where it can be 3x, but I don't know that it  
> has been observed much.

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