Originally posted here: https://groups.google.com/forum/?hl=en&fromgroups=#!topic/mongodb-user/T-NpDM6G0aM

Sun Feb 17 04:11:31 [conn218] update doc_metadata.metadata query:

{ entities.index: "philip morris/company", communityId: ObjectId('4c927585d591d31d7b37097a')) }

update: { $set:

{ entities.$.totalfrequency: 117, entities.$.doccount: 72 }

} nscanned:107 nmoved:55 nupdated:72 numYields: 32 locks(micros) w:59851387 30783ms

I'm trying to understand why nmoved>0 when my objects are all pre-populated as numeric (longs, via the Java driver)

The thread includes some relevant gists:
https://gist.github.com/Alex-Ikanow/4979336 - collection stats
https://gist.github.com/Alex-Ikanow/4979375 - example object

One thing I noticed in the example object is that some of the numbers are wrapped in NumberLong and some aren't - what determines this?