Suspect changes from [#6392] like https://sourceforge.net/p/allura/pastebin/5241fe8d1be1ce40366e7b29 are at fault.
Seeing a lot of queries like:
Tue Sep 24 20:52:23.721 [conn5127276] query pyforge.project_role query: { project_id: ObjectId('50c218025fcbc909b58b271b'), name: "*anonymous" } ntoreturn:0 ntoskip:0 nscanned:1591 keyUpdates:0 numYields: 10 locks(micros) r:1780438 nreturned:1 reslen:108 1094ms
Which is an unindexed query and perhaps not even a necessary query, when it is *anonymous
allura:tv/6709