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From Jason Rutherglen <>
Subject Re: Max Segmentation Size when Optimizing Index
Date Wed, 13 Jan 2010 21:43:00 GMT
Hi Trin,

There was recently a discussion about this, the max size is
for the before merge segments, rather than the resultant merged
segment (if that makes sense). It'd be great if we had a merge
policy that limited the resultant merged segment, though that'd
by a rough approximation at best.


On Wed, Jan 13, 2010 at 1:36 PM, Trin Chavalittumrong <> wrote:
> Hi,
> I am trying to optimize the index which would merge different segment
> together. Let say the index folder is 1Gb in total, I need each segmentation
> to be no larger than 200Mb. I tried to use *LogByteSizeMergePolicy *and
> setMaxMergeMB(100) to ensure no segment after merging would be 200Mb.
> However, I still see segment that are larger than 200Mb. I did call
> IndexWriter.optimize(20) to make sure there are enough number segmentation
> to allow each segment to be under 200Mb.
> Can someone let me know if I am using this right? Or any suggestion on how
> to tackle this would be helpful.
> Thanks,
> Trin

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