On 1/7/10 11:23 AM, Otis Gospodnetic wrote:
Merge factor controls how many segments are merged at once. The default is 10.
The maxMergeMB setting sets the max size for a given segment to be
included in a merge.
I wonder if renaming that to maxSegSizeMergeMB would make it more obvious what
this does?
Personally, +1 on the new naming , as it seems self explanatory than
maxMergeMB .
Otis
--
Sematext -- http://sematext.com/ -- Solr - Lucene - Nutch
Roughly, the upper bound on merged segments is the sum of their sizes.
So the rough upper bound on any segment's size is mergeFactor * maxMergeMB.
Mike
On Thu, Jan 7, 2010 at 11:04 AM, Dvora wrote:
Can you explain how the combination of merge factor and max merge size
control the size of files?
For example, if one would like to limit the files size to 3,4 or 7MB - how
these parameters values can be predicted?
Michael McCandless-2 wrote:
This tells the IndexWriter NOT to merge any segment that's over 1.0 MB
in size. With a default merge factor of 10, this should "generally"
mean you don't get a segment over 10MB, though it may not be a hard
guarantee (you can lower the 1.0 if you still see a segment over 10
MB).
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