Definitely take a look at Mongo's recommendations: http://docs.mongodb.org/manual/administration/monitoring/#diagnosing-performance-issues http://docs.mongodb.o

Definitely take a look at Mongo's recommendations: http://docs.mongodb.org/manual/administration/monitoring/#diagnosing-performance-issues http://docs.mongodb.org/manual/administration/monitoring/#di... This has gotten much better since I last used mongo heavily. I ended up using the slow query log, but it looks like the tooling has improved significantly and now there is a list of common problems