Start by writing a Mongo query, for example: {'id':'foo'} or { } to get all the documents.
Errors

Execute a query to see the results

Results
Query Stats

Query Statistics
METRIC | VALUE
--- | ---
Request Charge |
Showing Results |
Retrieved document count Total number of retrieved documents |
Retrieved document size Total size of retrieved documents in bytes | bytes
Output document count Number of output documents |
Output document size Total size of output documents in bytes | bytes
Index hit document count Total number of documents matched by the filter |
Index lookup time Time spent in physical index layer | ms
Document load time Time spent in loading documents | ms
Query engine execution time Time spent by the query engine to execute the query expression (excludes other execution times like load documents or write results) | ms
System function execution time Total time spent executing system (built-in) functions | ms
User defined function execution time Total time spent executing user-defined functions | ms
Document write time Time spent to write query result set to response buffer | ms
Round Trips |
Activity id |  |

Per-partition query metrics (CSV)
More details