Certainly!
You may still be able to mitigate this by lowering the max open files in your Mango/overrides/properties/env.properties file. In specific, the
#Set the number of files the database can have open at one time
db.nosql.maxOpenFiles=500
property. The comment is somewhat misleading, what this number really means is the maximum number of output streams that can be held open. Setting this to 0 would tell the database to always close files after every write, which would encourage flushing to disk (I believe MAPPED_BYTE_BUFFER streams may not be flushed until a subsequent garbage collection)
The downside would be that buffering is done for a reason, which is efficiency, especially when points are receiving fairly rapid writes. So, performance can be affected.