Segment Count of my Index is greater than the Configured MergeFactor

[RadhaJayalakshmi]

Hi,
I am using Solr 4.5.1. In that i have created an Index 114.8 MB. Also i have
the following index  configuration
           <indexConfig>
                <maxIndexingThreads>8</maxIndexingThreads>
                <ramBufferSizeMB>100</ramBufferSizeMB>
                <mergeFactor>10</mergeFactor>
        </indexConfig>

I have given the ramBufferSizeMB of 100 and mergefactor of 10. So this
means, that after indexing is completed. i should see <=10 segments. Thats
my assumption and even documentation says that.

But, after the indexing is completed, i went into Solr Dashboard, and
selected the collection, for which indexing is completed. It is showing a
Segment count of 13. 
How is this possible? As i have given mergefactor 0f 10, at any point of
time, there should not be more than 9 segments in the index.

I want to understand why 13 segments are created in my index??
Could appreciate if i can get response ASAP

Thanks
Radha




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