anchor.diff:  mongodb.collection.storageSize,gauge,,byte,,Total storage space allocated to this collection for document storage.,0,mongodb,storage space of collection
   mongodb.collection.nindexes,gauge,,index,,Total number of indices on the collection.,0,mongodb,number of indices on collection
   mongodb.collection.indexSizes,gauge,,byte,,Size of index in bytes.,0,mongodb,index size
  -mongodb.collection.indexes.accesses.ops,gauge,,access,,Number of time the index was used.,0,mongodb,index usage
  +mongodb.collection.indexes.accesses.ops,gauge,,event,,Number of time the index was used.,0,mongodb,index usage
   mongodb.usage.commands.count,rate,,command,,Number of commands since server start,0,mongodb,
   mongodb.usage.commands.time,gauge,,microsecond,,Total time spent performing commands in microseconds,-1,mongodb,
   mongodb.usage.getmore.count,rate,,fetch,,Number of getmore since server start,0,mongodb,
  
positive.code: mongodb.metrics.repl.network.getmores.totalmillisps,gauge,,fraction,,Fraction of time (ms/s) required to collect data from getmore operations.,0,mongodb,repl network getmores totalmillis ps
  mongodb.metrics.repl.network.opsps,gauge,,operation,second,Number of operations read from the replication source per second.,0,mongodb,repl network ops ps
  mongodb.metrics.repl.network.readerscreatedps,gauge,,process,second,Number of oplog query processes created per second.,0,mongodb,repl network readerscreated ps
  mongodb.metrics.repl.preload.docs.numps,rate,,doc,,Number of documents loaded during the pre-fetch stage of replication.,0,mongodb,repl docs nums
  mongodb.metrics.repl.preload.docs.totalmillisps,rate,,millisecond,,Amount of time spent loading documents as part of the pre-fetch stage of replication.,0,mongodb,repl docs nums
  mongodb.metrics.repl.preload.indexes.numps,rate,,doc,,Number of index entries loaded by members before updating documents as part of the pre-fetch stage of replication.,0,mongodb,repl docs nums
  mongodb.metrics.repl.preload.indexes.totalmillisps,rate,,millisecond,,Amount of time spent loading documents as part of the pre-fetch stage of replication.,0,mongodb,repl docs nums
  mongodb.metrics.ttl.deleteddocumentsps,gauge,,document,second,Number of documents deleted from collections with a ttl index per second.,0,mongodb,ttl deleted docs ps
  mongodb.metrics.ttl.passesps,gauge,,operation,second,Number of times per second the background process removes documents from collections with a ttl index.,0,mongodb,ttl passes ps
  
negative.code: mongodb.replset.replicationlag,gauge,,second,,Delay between a write operation on the primary and its copy to a secondary.,-1,mongodb,replication lag
  mongodb.replset.state,gauge,,,,State of a replica that reflects its disposition within the set.,0,mongodb,replset state
  mongodb.replset.votefraction,gauge,,fraction,,Fraction of votes a server will cast in a replica set election.,0,mongodb,votes fraction
  mongodb.replset.votes,gauge,,item,,The number of votes a server will cast in a replica set election.,0,mongodb,replset votes
  mongodb.stats.datasize,gauge,,byte,,Total size of the data held in this database including the padding factor.,0,mongodb,stats datasize
  mongodb.stats.indexes,gauge,,index,,Total number of indexes across all collections in the database.,0,mongodb,stats indexes
  mongodb.stats.indexsize,gauge,,byte,,Total size of all indexes created on this database.,0,mongodb,stats indexsize
  