Stats to return from db

[tomijaga]

Index stats

• Cardinality of each field
• % of total entries populating an index
  • Our indexes have a value for every entry in the db. If the field doesnot exist for that entry then the value set#Null`

collection stats

• Avg document size
• memory usage
• percentage of memory consumed by indexes

Query Stats

Stats returned in the response of every query

• instructions - instructions used in executing the query
• total - The total number of records that would be returned from the query if the data was not paginated. This might also be optional as this requires additional computation
• indexes_used - indexes used for the query. Should also show which parts of the query was executed on these indexes
• query_plan - the query plan generated for the query