mongodb - Dropping Mongo collection not clearing disk space -


i have collection 750,000 documents, it's taking around 7gb on disk.

i've dropped collection, files (test.0...test.11) still on disk.

  • if delete them, loose collections, not 1 dropped
  • shouldn't mongo deleting them?

just noticed database stats have error.

{     "ok" : 0,     "errmsg" : "collection [test.loadtest-2016-02-06 15:05:34z] not found." }

you have dropped collection, not database containing it. dropping collection not compact data files, nor deleting document. if want compact database, either drop entirely , reimport it, or compact using repairdatabase (see docs). beware though, cannot compact database online think if have 1 node.

if have replica set, adding new nodes , removing old ones safest way of compacting database online. time time , it's easy.


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